Selection of lubricant for wheel bearings. What a lubricant is better for hub bearings than mamber bearings

The wheel bearings (SP) are obliged to be in perfect condition, since the overall condition of the car and the comfort in control directly depends on this node. Quite often about the presence of the hub driver remembers only when it makes itself felt as a squeal. In fact, the hubs are one of those driving components of the car, which are required to be lubricated and checked at maintenance, usually TO-2.

From ignorance, it is necessary to lubricate the hub bearings and how often it is to do, today many car enthusiasts suffer. This part of the car assumes a fairly high load, which should be further further, but this function is slightly blocked when the friction is made between the shaft and the wheel bearing. Any friction has a negative, destructive nature, since the assemblies of the unit are wearing, so almost everything is necessary to lubricate. The benefit that the point is corrected, although it requires a speedy elimination.

If there was a non-standard sound, especially squealing in the area of \u200b\u200bthe leading wheels, then the trip should be postponed, especially long, until the item is lubricated.

Overview of lubricants with pluses and minuses.

The question is whether it is possible to lubricate the hub bearing will not even rise, since the answer is obvious - yes. Another more important nuance, which is really worth paying attention, while the primary is, is it better to lubricate the hub bearings?

Today there are a lot of lubricants today, each different from other additives, adding and the most base, so there is no longer the same. It is important to note, since there should be no mixing of several types of lubricants in the bearing.

In general, it is necessary to disassemble what means to lubricate the hub bearing, initially determined with the genus of the main substance:

1. Solidal. Surely most car enthusiasts have a similar substance in the garage and it is quite suitable for the task, it is not necessary without deficiencies. The advantages are in a low price and high level of resistance to moisture, but the temperature characteristics are not too impressive. Another modification of solidol is CONSTALIN, which has opposite characteristics;

1. Litola. The most popular I. effective lubricants. Now they are easily accessible and cheap, while the variety of lithol products is very large. Such oils are perfectly coping with lubricant loaded nodes, do not affect moisture and heat-resistant. Additionally, anti-corrosion additives are used;

1. Molybdenum. Also an excellent option, as it has all the above parameters, but also form a small, protective layer, preventing looting;

1. High temperature. It is infrequently required, they are also performed on the basis of litol, but withstand much higher temperatures, sometimes up to 1000 degrees. This effect is achieved due to the introduction of nickel and copper powders.

Choosing from the manufacturers of lubricants, the look is very scattered, but we advise you to turn to more well-known, eminent brands. Good product from Mobil, it is most often used. It is widely used, as it maintains a strong load on the car. You probably met such lubrication, it has blue.

Lubrication based on Molybdenum from Castrol is often recommended for vehicles that are experienced loads. The fact is that molybdenum envelops the driving parts with a dry layer and due to the additional protection of the mechanisms. It is also characteristic of the whole class what this option protects from scaling.

Divinol lubricants have increased plasticity. It is also very flexible to use, as performance characteristics are suitable for most cars.

Products from Molykote are also quite high-quality, so in the assortment there is a heat-resistant lubricant that does not react with most materials. Especially interesting is the version of Molykote BR 2 Plus, as it allows you to protect bearings from wear.

How to lubricate the hub bearing (removing, without removing) - instructions.

First of all, with a question, how to lubricate the hub bearing without removing it? Of course this is an option for those who just do not have the opportunity to remove this detail or time does not allow it to do. An important condition for this procedure is that the lubricant must necessarily be the same in the bearing itself and added. Usually, it is certainly difficult to learn the previous lubricant, so you still have to remove the hub.

So, how to lubricate the front hub bearing, without recroving it:

1. Need to install a car on the handbrake;
2. Lift the car in;
3. Remove the wheel, then the metal cap closes the hub;
4. Now it is necessary to remove the lock fixed ring using a screwdriver or subtle passage;
5. After that, access to the bearing is available, here it is necessary to add lubricants, then scroll through the hub.

Now it is known how to lubricate this node, but the way is much worse than the full analysis and further lubrication. In fact, in the previous embodiment, half of the procedure has already been performed from a full parsing of the hub, so you can simply add instructions.

1. After release from the fixture ring, it is necessary to remove the hub itself, and the brake disc should be kept;
2. Now it is worth leaving the bearing, it is done using the appropriate head and hammer;
3. Then it is necessary to clean the resulting part from the previous lubricant, probably it is very little or no, is not at all, it is performed using gasoline;
4. Visually check the integrity of the device and the absence of wear, then add the selected lubricant;
5. Scroll slightly and you can collect the hub.

Video instruction.

Above the process of lubrication of the front wheel, how to lubricate the rear wheel bearing, or rather the main differences from the previous version will look further. Immediately it is necessary to make a reservation that in some cars the rear joint venture is completely unlated, and in the rest simply there is no direct access to it.

The process of parsing and removing the hub is approximately the same, it is impossible to extract the bearing itself. It is located in a closed block. It is necessary to promote, hide the lid to remove it. Next will need a syringe, better with a long nose. In the gap, which is located at the edges we carry the syringe with lubricant and squeeze up to filling the bearing, it should also scroll periodically.

Stories of car owners.

Valery:

"I wondered if it was necessary to lubricate the hub bearing before installing, because it should be prepared for use. I decided that the manufacturer himself was puzzled by this problem, but, as practice showed - no, the next day I had to disassemble everything and lubricate again. "

The owner of the VAZ 2114:

"He began to observe that a certain squeal occurs emanating from the rear wheel. There was a similar sound only when the speed developed about 90 km, nor below, neither above was not the above. Reaching and removing the rear hub, it became obviously an extremely small lubricant content, added and everything became fine. "

Kirill:

"Once lubricated the bearing and everything began to work as a watch, but after a while the problem returned, and soon. Again I had to disassemble the wheel and, when the hub got to the fixed ring, everything became obvious, it was poorly fixed and because of this, the lubricant went out, and the bearings got stuck garbage. I cleaned, smeared and swallow began to fly again. "

Surely every owner of the vehicle would like to know what better lubricant For the bearings of the hub, for it is very important. Cars produced today are able to accelerate to unusually high speeds. In this case, it is important that all nodes and mechanisms function as reliably as possible. Separate attention should be paid to the wheel hubs.

So that they were operated as long as possible, you should use those lubricantswho recommends the plant where cars gathered. Today, the choice of such materials is great, which makes it possible to find an equivalent replacement for less money.

general information

Before determining the best lubricant, you need to find out several important moments. Of course, each owner of the car should examine the order of servicing his "iron horse". Friction nodes cannot be in operation of more than 40,000 mileage kilometers. Observing all the conditions, when using the simplest lubrication, you can significantly increase the life of the bearing.

When choosing the required lubricant, it should be relying on the following indicators:

What use lubricant? Although on sale there is a huge amount of such products, when buying, pay attention to the fact that it meets some requirements:

The appropriate level of viscosity and strength.

The ability to qualityly lubricate rubbing surfaces.

Ability to withstand strong temperature differences.

Stability to all types of load during operation.

Resistance to wear.

Resistance to corrosion processes.

The optimal choice for the front and rear hubs

Depending on the car drive, the large load is always on the leading axis. This suggests that all the details and mechanisms participating in the work will wear out somewhat faster. For example, if the front wheels are driven, you need to closely monitor how the front hub functions. Everything rests on the use of a certain type of lubricant. It is recommended to use here lithium lubricantFor it has the highest rates regarding the opposition of moisture, corrosion and temperature drops. You can pay attention to this type of lubricant as a consistent. It is good because it creates a special oil film, due to which the friction force is reduced between the individual element of the bearing.

If we talk about what is better for hub bearings Rear, then it is also worth using one of the above options. However, you can still look at the calcium lubricant. The basis in this case is solidol. It has a high percentage of fatty and viscosity, and also protects perfectly from moisture and corrosion. Often use substances where sodium soap is taken as the basis. All in this version is good, except for one - inability to resist moisture.

The best lubricants

Still, what is better to lubricate? This paragraph should be considered several specific options with all their advantages and disadvantages.

• Castrol LMX. Used in Mercedes cars. The only minus users called high cost. To buy 300 grams of such a material, you will have to spend about 500 rubles. As for the operating parameters, they are all at a high level. Used not only in the automotive industry.
• Mobil1 was created in Germany. Reviews are exceptionally positive. The lifetime of bearing increases significantly. It is equally good for both the front hub and for the rear. Good suitable for riding in difficult road conditionsthat fully meets today's realities. You can purchase for 350 - 450 rubles (depending on the region).
• Molykote G - 4700. Among all the characteristics there is a fact that it is resistant to work in different temperature modes. It helps to significantly reduce wear of rubbing surfaces and prevents the aging of the metal. The price varies in the range of 400 rubles. The one who used it remained completely satisfied. It is noted that it is suitable as a domestic car and foreign.

Replacement procedure

Replace the lubricant is quite simple. It follows to start removing the wheel. Next pull the protective cap. As soon as it is done, you can freely get the bearing. Rafting remove old lubricants from it. The same operation should be done with the place where it was installed. Using new lubricant, abundantly "fill" it in the bearing, as well as where it will be. Put the cap, put on the wheel and you can go on the road.

If it is impossible to make it on your own, it is worth going to the car service.

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How to lubricate hub bearings

Details requiring the effect of wrappings are wear out, and the lubricant itself is age. This detail is the wheel bearing. It is necessary to lubricate it regularly (every 20-30 thousand km). It is also recommended together with lubricant to disassemble the hubs and the adjustment of the gaps. In our article you will find answers on "What is the best lubricant for the hub bearings".

Some cars have closed bearings, which does not allow all the operational period to interfere with their process. But it is nothing, because in such a type of vehicles is introduced durable "liquid". But there are both cars in which the owner can independently enter and add "liquid", and in such cars it is not easy to be provided, but also should be carried out regularly.

Give the bearing with the help of release

What lubrication to use and in what quantity

For lubrication, it is better to use solidol with a viscosity from 800 to 1500 P. You can also use DT - 1, all sorts of means with the addition of sulfide and graphite (for VAZ car). It is still recommended to choose the option that the manufacturer advises. Litol is also found, dispersol. But the only one who corresponds to all criteria is Molykote. In any conditions, this thing protects the bearings of the hub.

Tools

We will need:

• key to 7;
• funnel;
• lubrication.

Instruction

This procedure is very fast, easy and efficient.

In this article you learned how to lubricate bearings and which lubricant is better to use.

Video "How to lubricate the bearing"

I suggest you view the video in which it is shown how to lubricate the spare part and what processing agent. After reading our article, you learned how the bearings are lubricated and where it is located. For our work, you can thank us, leaving your feedback slightly lower. :)

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Lubricant for hub bearings - how does it function?

Probably, most drivers go on the principle of "from breakdown to breakage", without understanding that it would be possible to save on expensive spare parts. But additional traffic is not the worst, since the technical condition of the vehicle also determines the safety and driver, and its passengers. And my own health is much more important than any traffic.

Anyway, it is simply necessary to inspect the car on time and change its worn components. Especially, given that the device of many cars, it allows you to make such operations personally. The most important security condition for automotive management is a timely replaced lubricant for the hub bearings. Experts recommend to shoot hub bearings and change lubricant after a run of 20-30 thousand kilometers.

1. What should be the lubricant for the hub?

Almost all rotating vehicle components have bearing in their composition. No exception and hubs of automobile wheels. In a classical understanding (for example, in cars from the VAZ producer), the hubs on the front wheels have two roller bearings of the conical shape. At the same time, the bearing cones are "watching" in opposite sides and it allows you to control the degree of clamp using the adjusting nut. For example, if it happened so that the bearings were slightly worn out and a strong backlash appeared on wheels, it is possible to eliminate this backlash just taking a nut.

It is worth understanding that structural bearings in the hub are located in a closed cable (with something closed on both sides). And this space in the middle of the clip must always be filled with a special lubricant.

Now our market presents a great set of both brands and names of lubricants for bearing wheel hubs. Usually, lithol-24 lubricants are used and similar analogs or substitutes. But whatever lubricant does not choose the driver, it must comply with some requirements and have the corresponding auto parameters. So, what should be the lubricant for the hub?

When choosing and buying lubricants for hubs, be sure to take action on its characteristics:

1. Viscosity and strength are parameters that characterize the possibilities of lubricant to be held on the surfaces of the automotive parts, and cause lubricant fluidity. Usually, the higher the viscosity of the lubricant and the more the fluid, the better, because it will at the same time and cover all the surfaces of the bearings, and will not interfere with the movements of moving elements.

2. The ability of lubrication is a parameter that causes the maximum reduction of the friction force of the parts of the wheel hubs. This quality is extremely important for any lubricant, but it concerns the hubs, then it is simply indispensable here, since the movement of the entire car depends on the movement of the wheels. And, if the lubricant for the hub will have low lubricants, then the car will begin to move the jerks, which often leads to sad consequences.

3. Resistance to temperature changes - characterizes the possibilities of lubricant to save their parameters when changing the temperature mode. It is extremely important that with frosty winter days a lubricant thickening, and hot summer days - did not become too liquid and did not lose its viscosity properties. And in the first, and in the second case, it does not lead to anything good.

4. The stability of the properties of lubrication under mechanical and physicochemical effects is the property of lubrication makes it possible to preserve its internal structure with high impact from the outer environment (for example, the effects of parts of different designs).

5. Anti-wear properties - characteristics that cause lubrication capabilities to reduce and resist strong wear of parts. Of course, sooner or later, the details of the wheeled hubs are still wear out and it will be necessary to replace them, but with high-quality lubricant to do it much less often. And this is also an additional savings on components.

6. The ability to resist corrosion - characterizes the degree of protection of bearings and other parts of the hub from corrosion. This property is extremely important for all parts of the car, because corrosion is the main enemy of the metal.

If you choose the original lubricants from famous automakers, you can be sure that they have passed thorough tests and fully meet all the requirements. We recommend that you acquire such lubricants. Despite the fact that they will cost a little more expensive, in the future you will save on a complete replacement of hub bearings, which will be needed much faster if used by poor quality lubrication. Replacing lubricant for hubs is made after their complete dismantling and disassembly.

2. How to remove the hub to replace the lubrication of bearings.

How to remove the hub? This issue is somewhere asked all drivers who are used to performing independently inspection and maintenance of their vehicle. The order of dismantling and reverse installation of wheeled hubs is not complicated. After performing it once, you will easily repeat this process in the future when re-maintained. To remove the hub you will need such tools:

1. Standard List Autoinstruments, which will be found in any garage (different keys, hammers, etc.).

2. Vistak, equipped with vice.

3. Jack.

4. If you need to replace bearings, you will not be superfluous for bearings. But in the absence of such a removal, it will be possible to do with your garages from your garage.

We will also need some consumables:

1. New lubricant for wheel hubs.

2. Kerosene or gasoline for washing parts.

3. New nuts and set of glands for hubs.

4. Some amount of vet (preferably clean and light colors).

Let us turn to the process itself. The removal of the hubs is performed in this order:

1. Fix vehicle With the help of the parking brake.

2. Raise with a jack part of the car from the wheel side, in which you need to remove the hub.

3. Remove the automotive wheel.

4. Remove the metal cap hub.

5. Unscrew and suspend the caliper from the brake mechanism.

6. Unscrew the nave nuts, remove the stubborn puck and separator of the outer bearing.

7. Remove the hub directly. In this case, it is necessary to hold the brake disc so that it does not fall.

After the hub was removed, the bearings become accessible to work and follow the work should be performed on the workbench. It is worth noting that the glands behind the internal bearings must be changed each time the resource of their operation is much smaller than the resource of the bearings and the presence of lubrication in the hubs and its quality depends on this element. Do not worry, their cost is low, so it will not hurt the pocket. Check or replacement of bearings is performed in the following order:

1. Remove the glands.

2. Get the separator from the inner bearing.

3. Wipe the hub prepared by the rags, external closures and bearing separators, rinse all elements with gasoline and wipe carefully once again.

4. Inspect the surface of all working parts of the rollers and both bearings. It should be smooth and clean. If you suddenly detected damage (scratches, sinks and sowers), the bearings must be replaced. If such damage was not detected, you can move to lubrication of bearings.

5. Separators with rollers abundantly lubricate with lubricant and set to the previous place.

7. Between bearings pour lubrication (approximately 40 grams) and finally collect the hub in reverse order To disassembly.

With the back mounting of the wheel hub, it is very important to properly adjust all the nuts so that there is neither an excessive strong tightening nor excessively strong backlash.

3. How to choose the right lubricant for hub bearings?

With the replacement of lubrication everything is clear, because the procedure is simple and quite sat for any motorist. Probably, to spend this procedure much easier than choosing suitable lubricant. So, how to choose the right lubricant for wheeled hubs?

Many motorists, and the Master Specialists on Car Services are constantly arguing about what kind of lubricant is better. After all, in any car store you can find just a huge number of different lubricants only for hubs. And if you add another N-number of lubricants for the other components of the car, then this variety is not difficult and confused.

Litol-24 lubricant is a basic lubricant that guarantees the operation of the car's chassis on very good level. If you do not know which lubricant to choose, choose Litol-24. In any case, pay attention to the recommendations from manufacturers of your bearings (on packages there are species of what lubricant to use). So definitely you do not lose. We do not recommend experimenting with lubricant emulsions, designed not for hub bearings, but for other elements of the car. These lubricants perform other targets and in other conditions of use, so they can completely harm bearings.

Tip! When to replace the bearings lubrication, pay attention to how old lubricant looks like. If the old lubricant dried, crackled or rolled in the form of lumps, and the bearing rollers are completely dry, do not use such lubrication anymore. Replace it on another and preferably from another manufacturer. The responsible manufacturer will never allow their lubricants to behave in a similar way.

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How to choose the right lubricant for the rear and front hub bearings

The good technical condition of the nodes of the front and rear wheels is one of the main security conditions for a car. Bearings are considered one of the most important details of the hubs. During operation, they are subjected to serious loads, operate under the influence of the external environment and temperature differences. Despite this, few drivers regularly check their serviceability. Over their work, it is started to think only when they begin to knock very hard or, in general, encourage. And very well, if such happens not at a speed for 100 km / h. Almost no one makes a regular inspection of bearings, their lubricant. And it is necessary to do it quite often, at least once at 20-40 thousand km. A detailed examination of whether there is no violation of the geometry of the paths of internal and external rings, the backlash, or other deformations, damage, and the periodic lubrication of bearings will allow them to last long. In fact, if you correctly monitor and care for rolling knots, they regularly lubricate them, they will serve for years. However, how to properly lubricate and which lubricant for the wheel bearings is better to choose not all.

Replacing the lubrication of the wheel bearing

What lubricants are suitable for bearings?

The range of lubricants today is quite wide. Many believe that any lubricating composition that does not follow in the bearings. And this will be enough for their correct and durable work. However, it is not. The hub bearings are required special. Among other things, even different types Bearings require applications different species Lubricants. Plastic lubricants are suitable for bearings. The main purpose of plastic lubricants is a decrease, mitigation of the friction of metal elements with each other.

They create a stable film on the surface of parts, which reduces friction inside the bearing, increases its operating parameters and prevents rapid wear. Also, plastic lubricants show anti-corrosion properties and contribute to the discharge of excess heat from the bearing, seals the parts inside the bearing.

Plastic lubricants in their composition have several main components: directly lubricant, thickener and modifier. It is they determined in what purposes and under what conditions this lubricant is used.

Several varieties of plastic lubricants are applicable for bearings: lithium, calcium, sodium, high-temperature and molybdenum, which have a different composition, properties and scope of application.

Among the best today are molybdenum lubricants. Molybdenum disulfide salts, which are contained in vast quantities, reduce friction, and, accordingly, prevent premature wear. They, enveloping from the inside the wheel bearing, prevent the formation of the scope, corrosion damage to the metal. Molybdenum lubricant is enough for much large mileage, up to 100 thousand km, which corresponds to the service life of the bearing itself.

However, molybdenum lubricants have some drawbacks. First, it is very afraid of moisture, and if the hub is depressurized, then the lubricant is better changed. Secondly, they are quickly contaminated, abrasive particles can fall into them, for example, dust, which leads to friction. And thirdly, such lubricants are afraid of high temperatures. In addition, they are sufficiently notable compared to other species.

Calcium lubricants (solidol)

Calcium-based lubricants are traditionally used to lubricate rolling knots. This is one of the cheapest tools at the same time good performance characteristics. When mixing various brands of solids, their characteristics do not deteriorate, which you can not say about other types of lubricants, where often mixing is contraindicated. Solidols often choose car owners for bearings, especially for the rear hub node. In the front hub, which is usually more loaded and operates at higher temperatures, it can also be used, but it is necessary to take into account the fact that Solidol is very susceptible to overheats. At temperatures above 80 degrees it disintegrates.

Uniol

Unioles outwardly similar to ordinary solidol. They also contain calcium. However, they have a better heat resistance. Some unioles are added in small amounts of molybdenum, which improves their native properties and increases the wear resistance of parts during operation.

Constalins

In these lubricants, sodium soap appears as a thickener. Constal has a higher melting point than solidol, but it is not waterproof. It is easy enough to wash off the surface with the help ordinary waterWhat makes it use very limited. In addition, it is inclined to heat-condition, which makes it impossible to use in the front hub with disk brakes, because the temperature there often reaches 100 degrees, or even more.

Litola

Litol - oil lubricant for wheel bearings, which is traditionally used by motorists on all hub nodes. It has a sufficiently thick consistency, waterproof. It has excellent performance. It struggles with friction, prevents the accelerated wear of the details. Litz-lined bearing works long and stable, and you will be sure that your running will last long. Litola is enough for 100-110 km of run, although the mechanics still recommend it to change it periodically.

However, Litola has cons. It has low anti-corrosion indicators, which requires re-processing in case of depressurization of the hub. In addition, litol can dissolve polymers. Therefore, before lubricating the bearing with Litol, it is worth contacting the instruction manual for the machine, there may be a ban on its use.

High temperature lubricants

They are used in rolling nodes when the car is used in extreme conditions. Nickel or copper powders are present in their composition. High-temperature can be lined with bearings in rolling nodes when the usual working temperature in the node significantly exceeds the usual 80-100 degrees, while such a means does not lose its operational performance at all. In addition, considering more complex operating conditions, there are a number of other requirements for high-temperature lubricants. They should not melt and flow when increasing the temperature, have chemical stability, not evaporate and have good mechanical strength.

How to choose a good lubricant?

Regardless of which of the above lubricant types, give preference to choose a really good tool worth considering also other lubricant characteristics.

1. It should be quite viscous and at the same time fluid. At the same time, it should not flow out of the bearing. A viscous and fluid tool will be able to cover everything inside the bearing, and at the same time will not make it difficult to move.
2. Lubricating characteristics. High lubricants are necessary to reduce friction inside the hub.
3. Resistance to low and high temperatures. It is very important that the lubricant inside the bearings does not frozen in the winter, and in the summer it was not melted and did not flow out.
4. Anti-wear properties, or the ability to prevent wear and failure of the bearing.
5. Stability of work under the influence of the external environment.
6. Anticorrosion properties. The tool not only should facilitate the movement of parts in the bearing, and also protect them from corrosive lesion.

conclusions

When choosing lubricant for bearings, it is worth considering a lot of parameters. This, the basic composition of the means, its characteristics, vehicle operating conditions, as well as many technical properties of the lubricant itself. Only choosing the lubricant correctly, you can be sure of the work of the hub nodes and the entire chassis. You will remember the rolling nodes not more than every 20-40 km of run, namely only with the next planned lubrication of bearings.

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What better use lubricant for wheel bearings

Choose the best: Lubrication for wheel bearings

Reliable, accurate and durable rolling bearings are in every rolling knot of the car. To such reliability you get used to very quickly, so the hub bearing sometimes remains overnight. And he reminds about himself only when he begins to trickly buzz. But if the driver has stopped with noise insulation of the cabin, then the bearing acts tougher. He just encourages, and good, if it happens not at a speed of 120 km / h.

In the photo bearing, which you need to adjust and lubricate in time, so that it does not swap while driving

Bearing is not much needed. Proper adjustment and timely lubrication. Then he will be almost eternal. At least most of them are designed for the full service life of the car. In the event that the bearing is made of high-quality steel and the lubricant for the wheel bearings corresponds to the working conditions. But the bearings themselves will not touch much, but they touch the lubricant thoroughly.

Types of consistant car lubricants

No, we are not going to drag your eyes and delve into the chemical processes and technology for the production of grease, just quite often have to hear the ignorant view that you can clog everything that does not fail. It is doubly insulting for the wheel bearing, because some classify consistant lubricants in color, like a ski clock. This is not at all the matter, so in a nutshell you will have to tell about the types of consistant lubricants, which can please in the wheel bearing, let's say, by negligence.

VideoTest Bearing Lubricants

All wheel bearings, regardless of their design, are lubricated only by plastic, or consistent lubricants. Liquid oil is almost impossible to lubricate the hub, as it would cause a double rise in price. The consistency lubricant plays the role and sealing material, at the same time having a protective effect on the bearing. Any plastic lubrication consists of three components - lubricating material, thickener and modifier, which determines the use of lubrication in certain conditions. Here are their main species and confuse them extremely undesirable.

Preservative lubricants

The simplest, they are blurred by water not immediately, but gradually, have lubricating functions, but first of all are intended for the conservation of metal parts, protection against corrosion.

Electrically conductive lubricants

Electric conductive lubricants are needed to maintain car electrical compounds

The name speaks for itself. They lubricate the terminals of batteries, relays, fuses and other electrical compounds that may suffer from corrosion.

High temperature lubricants

They add copper or nickel powders. Can keep temperatures up to 1000 degrees without loss of properties.

Lithium lubricants

Everything is clear here. These are lithols that are traditionally used when lubricating bearings.

Molybdenum lubricants

It is used for lubrication in moving compounds, form a thin protective layer on the surfaces of the rubbing parts, opposing the scope.

These are the main types of lubricants that are used when servicing the car, and it is impossible to confuse, since they, as it turned out, non-violent.

Briefly about wheel bearings

It is quite logical that in order to know what to lubricate, you need to know what to lubricate, since the hub bearings are different, and they also require a completely special approach. Nevertheless, there are one common feature for all bearings in the hubs - hellish working conditions. They must withstand huge loads, can heat up to high temperatures, but must be very reliable. Regardless of the rear or front, they are installed on the drive hubs, or on the slaves, they must provide minimal rolling resistance and have highest level reliability.

The hub bearing can be roller conical and ball. Each of their these types has its own minuses and advantages, but to understand what load is to experience the cage and ball or roller, let's just say that the wheel of about 60 million revolutions for 100 thousand km. And this corresponds to about 30 million rollers or balls. Naturally, with such a load, steel tired and without high-quality lubrication on the surface of the bearing rings and even on the balls can form microcracks, leading to the destruction of the hub bearing and sad consequences.

Hub bearings come in various types and require different types of lubrication

No less role in the life expectancy of the bearing than lubrication playing it proper installation. The conical bearings of the front hub of rear-wheel drive models of VAZ, Ford or Opel in no case should be adjusted to the eye or using a conductor from a tap pipe. If the instructions indicate that the tightening torque is so, it needs to be strictly observed, because how carefully nor lubricate and rinse the knot, the threw the bearing will overheat and swap sooner or later, and the poor will crumble. The moment of tightening the nut and for the bearing of the front leading drive hub is important. Two-row ball bearings are designed for such a tightening torque so that the balls rolling on their tracks absolutely without hints on the gap, but also not bored. At the eye, the tightening torque is practically impossible.

Lubrication for wheel bearings

40 thousand kilometers and no more - such a regulatory mileage for replacing lubrication of any of the wheel bearings. Observing it, hear the buzz in the hub is almost impossible, even if lubricated the bearing most ordinary lithium lubricant Litol 24. But there are quite a lot of lubricants, each of the companies producing operational materials, produces brands of plastic lubricants for any of the bearings. The recommended lubricant brand is mandatory indicated in the documentation for the car.

Basic criteria for selecting a certain type of lubricant - load on the bearing, speed of rotation, temperature and steel brand. As well as the degree of protectedness from moisture and dirt. So, for low-loaded wheel bearings, simple lithium lubricants with high-temperature indicators can be used. Less resistant to the temperature composition is simply leaving the bearing, and less resistant to water will be washed. Lubrication will lose its plastic properties and the bearing will have to work on dry.

What a lubricant is the best for a certain model of the car, the engineer has been best known to the approval of a bearing for use in the hub, so the amateurness in this matter is not entirely appropriate, and even more so it is impossible to lay the lubricant of another type. For example, the Castrol water-repellent grease on molybdenum Divinol is not only not recommended, but also is dangerous. They are designed for different working conditions, and the grease is not dependent on the manufacturer's brand. In the same way, as dangerously applying Mobil, intended for bookmarking in the rear bearings of the Chevrolet Nivrolet or UAZ Patriot, in the front hubs Toyota whole. Work, load, humidity - completely different.

When choosing a lubricant, it is necessary to take into account the steel brand, load, the speed of rotation of the bearing and the temperature regime

Finally - about doses. First, when the lubricant is replaced, the bearing must be thoroughly washed with gasoline from dirt, and secondly, it is harmful to looser to lubricant, and it is not necessary to preoccupy. Too much lubricant will cause unnecessary energy losses, the lubricant is expanding and extruded out, despite the fact that only 2% of the entire material works on the contact surface. If the dose is normal, then in the process of work will be rotated the lubricant, which will provide a long service life of the hub. Only considering all these nuances, we have a chance to never hear the road bearings and remember them only once every 30-40 thousand kilometers of good words and high-quality lubrication.

http://avtomotospec.ru.

Bearings are the most common nodes. They are widely used in various industrial equipment, machinery, passenger and trucks, sports inventory, etc. They received their prevalence due to the simplicity of the device and low cost.

During operation, various loads, speeds, high and low temperatures affect these nodes. Without proper maintenance, they quickly fail. Bearing lubrication allows you to reduce wear of nodes, protect them from temperature effects, corrosion and other factors that adversely affect performance and reliability.

Why do you need bearings?

Bearings are nodes that are part of the supports of rotating shafts and axes. They take axial and radial loads that are applied to the axis or shaft, and transmit them to other parts of the design, such as a housing or frame. They should also provide movement with minimal losses and hold the shaft in space. It is from the quality of the bearing depends on the efficiency, service life and performance of a particular equipment.

Two large groups of bearings are distinguished by the type of friction. These are rolling and slip nodes. A separate group is magnetic bearings.

Bearings Slip

Slip bearings are a housing with a hole in which the sleeve is pressed. The most common design consists of a detachable housing and a liner made most often from non-ferrous metal. The gap between the bearing sleeve hole and the shaft allows the shaft to rotate freely.

Depending on the operating conditions, the circumferential velocity of the trimps and the design, the following types of friction are distinguished: liquid, boundary, dry and gas-dynamic. In bearings, where the friction is liquid, at the time of starting the stage of the boundary.

Lubricant is one of the main conditions for reliable bearing. It provides the separation of moving parts, low friction, removes heat and protects against aggressive external influence. Liquid, plastic, solid and gaseous lubricants are isolated.

The highest operational properties The porous self-lubricating bearings are noted, which are manufactured by powder metallurgy. In the process of work, they are heated and highlights lubricant from the pores. So lubrication falls on the working surfaces. At rest, it absorbs back.

Sliding bearings can be separated from the form of the bearing opening (single or multi-surface, with or without displacement of surfaces or without a vehicle displacement, in the direction of load perception (radially resistant, axial, radial), in design (built-in, detachable, delicate) , by the number of oils (with one or several valves), adjustable and unregulated.

The advantages of sliding bearings include:

• Simple design
• Efficiency at large diameters of shafts
• The ability to withstand large vibration and shock loads
• Reliability in drives operating at high speeds
• Ability to adjust the gap
• Ability to install on crankshaft shafts of detachable bearings

Of the disadvantages, a reduced efficiency can be distinguished, high requirements for the purity of lubricant and temperature, uneven wear of the pin and bearing, big flow Lubricants, large friction losses when starting, relatively large axial sizes.

Rolling bearings

Rolling bearings operate mainly under rolling friction. They consist of 2 rings, rolling bodies, separator that separates the body of rolling apart from each other, holds at the same distance and directs their movement. Outside the inner ring and inside the outer ring are gutters for which the rolling bodies move.

In order to reduce the dimensions, as well as to increase stiffness and accuracy in some nodes, combined supports are involved. They are a gutter that are made directly on the surface of the cabinet part or on the shaft.

Some types of rolling bearings are produced without separator. They contain a large number of rolling bodies and differ with greater lifting capacity. The negative side of the absence of the separator is to reduce the limiting frequency of rotation due to the increased moments of resistance to rotation.

Rolling bearings are ball (radial, spherical, stubborn, radial-resistant, radial for body assemblies), roller with cylindrical (radial, resistant), conical (radial-resistant, resistant), spherical rollers (radial self-aligning, resistant self-aligning), With needle rollers (stubborn, radial, combined), radial toroidal, radial with twisted rollers, combined, roller and ballproof, reference rotary devices.

Compared to sliding bearings, rolling nodes have the following advantages:

• Lost friction losses
• Higher efficiency
• The moment of friction at the start is less than 10-20 times
• Easy service and replacement
• Lower lubrication consumption
• Low cost
• Easy repair equipment
• Saving non-ferrous metals that are needed in the production of bearings of sliding

The disadvantages of rolling bearings include the complexity of the installation and installation of nodes, noise during operation, unsuitability for operation at high vibration and shock loads, high cost for small batches, limited use in conditions of very high loads and high speeds, increased sensitivity to errors when installing.

Magnetic bearings

Magnetic bearings (suspensions) operate on the principle of levitation, which is created by magnetic and electric fields. Due to this, the suspension of the rotating shaft can be carried out without physical contact and ensure its rotation without wear and friction.

According to the principle of operation, magnetic bearings are divided into magnetohydrodynamic, superconducting, diamagnetic, conductive, induction, LC-resonance, electrostatic, active and permanent magnets. Today, active magnetic bearings (AMP) are most popular. These are mertonic controlled devices, where the position of the rotor stabilizes with the help of the forces of magnetic attraction, which acts on the rotor from the electromagnets. System automatic control Adjusts in them the current through the signals of the rotor movement sensors.

The complete contactless suspension of the rotor is carried out using one axial AMP and two radial, or two conical AMPs. That is why such a system contains bearings that are built into the case of the machine, and the electronic unit Control, which is connected to sensors and windings of electromagnets using wires. Signal processing can be both analog and digital.

The advantages of active magnetic bearings include:

• Relatively high load capacity
• The possibility of use at high speeds, low and high temperatures, vacuum, etc.
• High mechanical strength
• Ability to create non-contact sustainable body suspension
• The ability to change rigidity and damping widely

For the operation of active magnetic bearings, a complex and expensive equipment is required, as well as external source Energy. Unfortunately, all this greatly reduces the reliability and efficiency of the entire system. Therefore, passive magnetic bearings (PMP) are currently being developed. For example, high-energy permanent magnets Based on Neodymium-Bore (NDFEB), which do not require complex adjustment systems.

Scope of bearings

The scope of gliding bearings is due to the absence of the possibility of using rolling bearings. For example, they are widespread in the equipment with a high speed of rotation: in centrifuges, machines, etc. But in the conditions under which the bearings are operating, their service life is relatively small.

Also, sliding bearings are used in cases where the node must be collapsible, for example, bearing crankshaftWhen the node should work under the influence of high shock loads and / or have small geometric dimensions (starters). In agricultural machinery, the use of these bearings is due to operating conditions: aggressive media, heavy loads, low speeds, humidity.

They are indispensable in metalworking equipment. So in rolling mills instead of rolling bearings, textolite liners are used. This is due to the fact that the shaft to the liner must impose no less than 60%.

Rolling bearings are widely used in various electrical equipment. Unlike sliding nodes, they are less susceptible to wear. This is especially important for technology where small air gaps, smaller friction losses and long-term operation without replacing lubricant material.

In small electrical machines, closed bearings with one or two protective washers are used. This is due to the fact that they do not require special seals to hold the lubricant, since the seals are already built into the bearing itself.

In addition to various electrical machines, rolling bearings are used in the nodes of aviation technology, where there are no high specific loads, various speeds, automotive equipment (frost, hub, etc.), conveyor systems, shipping, agricultural special equipment, trucks, etc. .

Active magnetic bearings are used in turbocompressors, turbo flowers, turbocolecular pumps, electric shocks, turboctanders (cryogenic techniques), gas turbines and turboelectric units and inertial energy storage.

Service bearings

The main problem of bearing nodes is strength. Most often it is associated with the initial load, which is very difficult to install. During the period of hosting, the moment of resistance of the prejudged bearings is quickly reduced. Therefore, the initial load can only be monitored in new bearings. Nevertheless, damage may occur at low loads. This is due to the fact that rollers and balls are prone to slip instead of rolling.

Under the usual operating conditions, the properly selected and properly used bearing with 90 percent probability will work all life. The chance of failure in this case is 10%. About 43% of bearings come into disrepair due to poor lubrication, 27% due to poor installation.

The fact is that even the highest quality steel cannot compensate for the shortcomings of the lubricant material and the deformation of the grip. Lubricant bearings of inadequate quality leads to overheating of the node and its encoding. In some cases, ignition may even occur.

The main reasons for the failure of bearings is bad lubricant, poor-quality installation, heavy conditions operation, disadvantages of seal, low quality bearing: low-grade steel, inaccurate geometry, defective seals and separators. It is because of the external factors there are about 90% of premature breakdowns.

The most common faults when operating bearing are extraneous noises when working, overheating, vibrations, leakage or contamination of lubricant material.

Noise When the bearing operation can be divided into a loud metal sound, a constant loud sound, intermittent sound. As a rule, they appear due to excessive loads acting on the node, improper assembly, lack or unsuitability of lubrication, contact of rotating parts, cracks, brinelling, peeling on tracks, too big clearance. To solve these problems, in some cases it is sufficient to adjust the landing or replace the lubricant material. But with serious damages it will be necessary to replace the bearing.

Overheating is due to too small clearance, large amounts of lubrication, its lack or contamination, improper assembly and damage to seals and surfaces. Vibrations arise due to brinelling, peeling, improper assembly and penetration of foreign particles. If the fault is caused by the first two reasons, then the bearing can be replaced. If the lubricant follows or discolorizes, this is the consequence of contamination by foreign particles and wear products, or the lubrication is not suitable for the operating conditions of the node.

Oddly enough, but most of the above problems can be solved using high-quality lubricants. Timely replacement of lubricant in bearings is able to increase the service life of the nodes, increase their reliability and efficiency. We'll figure it out lower than lubricating bearings.

Types of lubricants for bearings

Regular bearings maintenance is a pledge of their long, efficient and reliable operation. But it is impossible to just take and lay any lubricant to the node. It is necessary to be guided by certain parts of the manufacturer of the part. Lubricant is laid so that all the working surfaces of the bearing are covered: separator, rollers or balls, rolling tracks. Low-speed bearings are filled completely. In high-speed nodes, where the DN value exceeds 400000 rpm. The lubricant should take 1/4 of the space. In all other cases, it is laid on 1/3 of the volume.

Oils, plastic lubricants, solid lubricants and gases are used to maintain bearings.

Oil

Bearing oil is used in cases where nodes operate at high temperatures and speeds. It provides them with constant cooling by removing heat to the environment.

Highlight synthetic, semi-synthetic and mineral oils. Synthetic is based on polymers and various organic acid compounds. Today, the market presents polyalphaolefin (PJSC), polyglycol (Pag) and essential oils. Compared to mineral, they are practically not subject to viscosity changes in temperature drops and do not lose their characteristics in the aggressive environment.

Mineral oils are manufactured based on oil refining products. To enhance their working properties, various additives are introduced into the materials. Along with the synthetics, they are widely used in rolling and slip bearings.

The semi-synthetic is made on the basis of mineral and synthetic oils.

Oils perform several important features:

• Friction. Reduces friction force when contacting sliding or rotating surfaces
• Protective. Forms a protective film that protects against corrosion and mechanical damage
• Barrier. Protects the inner surface of the bearing from the penetration of mechanical particles and aggressive substances
• Thermostat. Reduces the probability of overheating by removal of heat outward

Despite the fact that for service it is necessary to use oil bearings recommended by the manufacturer, but it happens that the recommendations are not available and is unknown, which lubricant to use. In these cases, during the selection, it is necessary to proceed from the operating conditions.

In bearings that work at low temperatures, oils are recommended with a pour point by 15-20 ° C below operation conditions. For example, if the bearing operates at a temperature of -20 ˚С, the lubricant must withstand minimum -35 ° C. In this case, the viscosity of the product must be minimal. For lubrication of high-temperature nodes, viscous oils need to be applied.

The higher the angular speed of rotation of the bearing, the less should be the viscosity of the lubricant. If the bearing is operated with frequent starts, stops and reverses, oil should be more viscous.

Synthetic oils are mainly used in the sliding bearings. In rolling bearings, the viscosity of the material is determined by the design of the part. For example, in cylindrical and ball bearings, the viscosity of the oil should be at least 13 mm 2 / s, in spherical and conical - at least 20 mm 2 / s, in persistent - at least 13 mm 2 / s.

Oils in bearings come in several methods:

• Immersion (for low and medium speeds)
• Drip feed (for high-speed bearings)
• Oil fog (for high and super high speeds)
• Splashing (gearbox, gearboxes)
• Circulating lubrication system (high temperatures and speeds)
• Inkjet lubricant (ultrahigh speed)

Plastic lubricants

They are ointments that serve to reduce friction. Compared to oils, they are better held on vertical surfaces, do not come out of contact with interacting surfaces and sealed lubricated nodes.

Plastic lubricants are used if bearings work at small, medium, high speeds and / or shock loads. Unlike oils, plastic lubricants have a wider area of \u200b\u200bapplication and are suitable for practical for any operating conditions of nodes.

Depending on the factors of the bearing, it is distinguished:

• Universal lubricants
• High temperature lubricants For bearings
• Frost-resistant lubricants
• High Speed \u200b\u200bBearing Lubricants
• Lubricants for high and extreme high loads
• Food industry lubricants
• Lubricants for nodes working under the influence of chemically aggressive media
• Noise-canceling lubricants

Plastic lubricants at 70-90% consist of basic oil (Mineral, synthetic, semi-synthetic) and thickener 10-15%. Different soaps are used as thickeners, organic and inorganic products and solid hydrocarbons. It is they that allow lubrication at rest to behave as a solid, and under the influence of loads - as liquid.

In composition, plastic lubricants may be lithium, silicone, polyurea, etc.

Additives and various additives are up to 5% of the total mass of lubricant. It can be anti-nasal, antioxidative, anti-corrosion components, etc. Antifriction and sealing agents are added to the lubrication additional properties: zinc powders, copper or lead, graphite, molybdenum disulfide, etc.

According to the classification of NLGI, the consistency of lubricants is next:

• 000 - viscous and very thick oils
• 00 - very soft lubricants
• 0, 1 - Soft lubricants
• 2 - Vaseline-like
• 3 - almost solid
• 4 - grainy
• 5 - solid
• 6 - soyl-like

This classification applies only to import lubricants. In domestic materials, it is not used.

The type of lubricant thickener may be soap (based on carboxylic salts), hydrocarbon (based on tug-solid hydrocarbons), inorganic (based on silica gelt, graphite, asbestos, etc.) and organic (based on carbamide derivatives and crystalline polymers).

Solid lubricants

In its pure form, solid lubricants are used only in sliding bearings. They form a subtle dry layer that reduces wear and friction. Such materials are used in cases where oils and plastic lubricants do not comply with the operating conditions and requirements of equipment, for example in vacuum, radiation, etc. They are widespread in metallurgy, instrument making and mechanical engineering.

Polytetrafluoroethylene (PTFE, Teflon), graphite, Molybdenum disulfide (MOS 2) or soft metals (copper, zinc, etc.) are used as solid lubricants and coatings based on them.

Molybdenum disulfide is characterized by a low coefficient of friction and in the atmosphere, and in vacuo. In an inert atmosphere, it is thermostable at temperatures up to +1100 ° C, but in contact with air, the use of material is limited to temperatures +350 ° C ... + 400 ° C. MOS 2, in contrast to graphite and PTFE, has a higher lifting capacity. Also, the material when working in vacuum replaces graphite.

Graphite has a low friction coefficient and very high thermal stability (up to +2000 ° C). Adsorbed pairs in graphite significantly enhance its lubricating properties. But in a dry medium, for example, in vacuum, the use of graphite may be limited.

When using graphite at temperatures below -100 ° C, a compulsory receipt of adsorbed vapors should be ensured to a graphite lubricant layer, since under negative temperatures its friction coefficient increases.

Due to oxidation at temperatures +500 ° C ... + 600 ° C, graphite use is limited, but with the addition of inorganic additives can be used at temperatures up to +550 ° C. In a deep vacuum, the material loses its lubricating properties, resistance to radiation and chemical environments.

Polytetrafluoroethylene (PTFE) has a very low friction coefficient both in the atmosphere and vacuum. It can be used at temperatures from -100 ° C to +250 ° C. PTFE does not differ in durability and high lifting capacity as other materials. It is not used at high temperatures, as it has low heat transfer and thermal conductivity, but has high resistance to various aggressive environments.

Powders of soft metals, such as zinc, India, copper, silver, gold and lead have a low friction coefficient and in vacuo, and in the atmosphere. They are widely used at high temperatures up to +1000 ° C, as well as for lubricating elements with minimal slip.

Gases

Gas lubricants are lubricants in which the surface friction surfaces in relative movement are separated by gas. To do this, air, chladone, neon and nitrogen, as well as low grade gases, such as hydrogen are used. This species Lubricants are used in turbocompressors, gas turbines, ultracentrifugations, equipment for nuclear installations, friction nodes of accurate devices.

There are 3 types of gas lubrication:

• Gazodynamic
• Gazostatical
• Gazostatodynamic (hybrid)

The gas-dynamic lubricant shares the surfaces due to the pressure, which occurs in the gas layer due to the movement of surfaces. It is used in low-loaded and high-speed nodes, such as compressor bearings and rotary pumps, high-speed electric motors, ultracentrifugations.

Gazostatic lubricant shares surfaces that are in relative movement or rest due to gas. It enters the gap between the pressure surfaces in 0.3 MPa. This type of lubricant is used in the nodes of mechanical ultrasound generators, high-speed centrifuges, high-speed grinding heads.

Gazostatodynamic lubricant is universal. It combines the principles of operation of gas-dynamic and gas static lubrication.

Characteristics and properties of lubricants

Depending on the type and composition, all lubricants have certain properties. Nevertheless, the main characteristics of lubricants can be unified.

Let's start with the strength of the lubricant for bearings. The higher it is the less likely that the lubricant is squeezed out of the bearing. This property applies to plastic lubricants and oils. Solid lubricants and gases are deprived of this characteristic. Nevertheless, the lubricant should not have too high strength, as it will not be able to freely get into the friction zone.

The viscosity of the lubricant determines its consistency. It varies from very soft to soap-like in plastic lubricants, and from very liquid to very thick in oils. The viscosity is a non-permanent value, as it depends on the external factors: temperatures, deformation.

The heat resistance determines the upper limit of the working temperatures of the lubricant. What it is higher, the better the lubricant will operate at high temperatures. If the heat resistance is insufficient, the lubricant can find out from the friction zone, smoke and even ignite. Therefore, heat-resistant lubricants are the best solution for working at high temperatures.

Frost resistance determines the lower limit of operating temperatures. If it is insufficient, the lubricant thickens and makes it difficult to move the movement of the nodes. Low-temperature lubricants allow nodes uninterrupted to work at negative temperatures.

Mechanical stability determines the behavior of lubricants after deformation. The change in properties depends on how intense and long-term exposure they were subjected. Low mechanical stability lubricants are not recommended to be used in leakage nodes.

The ability of lubricants to preserve properties and composition as a result of oxidation, dispersion medium or evaporation depends on physicochemical stability.

The water resistance is the resistance of the lubricant to water: leaching, dissolving. Water resistant lubricants do not absorb water and do not enter into a chemical reaction with it.

Adhesion is a lubricant ability to hold on various surfaces. Materials with good adhesion sticky to the touch, difficult to wash off and erase.

Anti-corrosion properties, anti-corrosion properties allow lubricants to prevent jamming and lowering surfaces, reduce their wear and protect against corrosion exposure.

Top 5. Plastic Bearing Lubricants

The material is widely used in the friction nodes of the chassis of lifting and vehicles and cars, in the bearings of fans, electric motors, metalworking machines, mechanisms of general industrial equipment. It is also suitable for hubs of friction of conveyor systems, machines and installations in the cement, steel and mining industry.

In addition to bearings, lubricant can be used in guides, gear transmissions, slutsal connections and flexible shafts in shells.

EFELE MG-211 has an increased bearing capacity, high anti-corrosion and anti-wear properties. The material is resistant to watering with water and is characterized by good colloid stability, as well as a long service life. Can perform the function of antiavarian lubrication.

The material is designed for the friction nodes of the chassis of lifting vehicles and cars, bearings of electric motor and fans, spindle bearings, ball-screw gears, guide metalworking machines.

It can be used in the friction assemblies of conveyor systems, various open and closed gear transmissions, spline connections and flexible shafts in the shells.

Lubrication works in a wet environment, resistant to watering water. It has an increased bearing capacity, anti-corrosion and anti-wear properties, as well as anti-emergency lubrication properties and a long service life.

Lubrication is used in nodes and mechanisms of automotive equipment and industrial equipment. In particular, it is used to maintain bearings and sleeves, which work at elevated loads, high speeds, as well as shock loads.

The material has anti-corrosion and anti-wear properties, is not washed with water and resistant to its long-term effects. It is distinguished by a long service life and can be used in centralized lubricant supply systems.

Renolit EP 2.

Lubrication has oxidative and mechanical stability, anti-corrosion properties and long storage.

In addition to plastic lubricants, oils and coatings can be used to maintain bearings. Below are the popular materials used for bearings.

- This is an antifriction coating (AFP) based on graphite and molybdenum disulfide, which is cured at normal temperature. Material refers to dry lubricants, so used only in sliding bearings.

The coating has a high frost and heat resistance, resistant to chemically aggressive substances, radiation, vacuum. It is characterized by a high bearing ability, excellent adhesion, can be painted, facilitates installation and disassembly.

The material solves problems such as grappling, jackets, jamming, brinelling, hoppy movement, sticking dust and abrasives on the surface.

The solid sensor antifriction coating is an analogue of Molykote D-321R and can be replaced in any cases.

Having the same work properties, coating Modengy 1001 is much cheaper.

Modengy 1001 can be purchased in 90 ml aerosol cylinders and in a bank of 1 kg or a bucket of 4.5 kg.

Synthetic oils For moderately loaded rolling and slip bearings. Presented in several viscosity classes: 220, 320 and 460. They are compatible with other oils on a mineral and synthetic basis and do not require special procedures when replacing.

Oil B possess high lubricant properties, high viscosity index, excellent thermal and oxidative stability. They reliably protect against corrosion, wear, ensure the purity of bearings and have a long service life.

A coating based on a molybdenum disulfide with aqueous binder, curable at at room temperature. It can be applied in cases where it is impossible to lubricate with a plastic lubricant or oil. Divorced with water in the ratio to 1: 5.

In addition to sliding bearings, it can be used in chains that guide slides, open and closed gearboxes, hinges, levers and worm gears.

Bearings, invented more than a hundred years ago, became an indispensable detail in any rotating mechanism - they are able to significantly reduce friction compared to their analogues, as well as for individual components. The car also uses many bearings - among them it is necessary to note the details in the engine and transmission, as well as in the hubs of the wheel. The latter usually pay less attention to, considering them almost "eternal". However, it is better to abandon this approach, since the hub bearing swapping at a huge speed can cause a serious accident. To avoid such problems and ensure reliability of the chassis of the car, you should know what kind of lubricant for the hub bearings is better.

What lubricants can not be used?

First of all, it must be said that not every grease will be a good option to reduce the friction of the wheel bearings. This is due to the special conditions of operation of such a node - it moves with a very high speed and heats up to a high temperature. It is the last circumstance that is the reason for the refusal of lubricants based on synthetic hydrocarbons - they begin to collapse already when heated to 45-60 degrees. This group belongs silicone and vaseline compositions that are widely represented on russian market. Each motorist should be remembered that hydrocarbon lubricants are conservative and are not suitable for processing such high-loaded parts as the hub bearings.

It is also better not to acquire lubricant on a graphite basis, since it contains a sufficiently large number of abrasive particles leading to accelerated wear of the bearing housing. Graphite lubricants Used to process sediments or to protect against the corrosion of the springs. When packing such a fund into the wheel bearings, the repair of the chassis is to be done after 25-30 thousand kilometers, although the nominal service life of such parts reaches 100-120 thousand kilometers.

Quickly destroy the wheel bearings are capable and lubricant based on calcium or sodium. Such tools are able to effectively deal with friction, but they cannot prevent the spread of corrosion. At the same time, the exploitation of the wheel bearings is carried out in very difficult conditions, so they can quickly fail without proper protection. It is also worth abandoning the use of lubricants with iron and zinc, even if they are intended for bearings - most likely, such funds must be used in industrial equipment.

Best tools

Based on disulfide molybdenum

One of best tools, protecting wheel bearings from destruction, is a lubricant containing a large number of molybdenum disulfide. This metal salt is capable of significantly reduce friction force, reducing the wear rate of the entire node. In addition, lubricants made using such technology are able to stop the spread of corrosion due to the formation of a very dense indestructible film on the surface of the processed part. The service life is equal to the duration of the operation of the wheel bearings themselves - more than 100 thousand kilometers, so with a competent installation of any problems with chassis There will be no car.

Of course, even such high-tech lubricant can not do without certain disadvantages - first of all, they are presented with sensitivity to moisture. If the housing of the hub will be depositized, the lubricant is better to change, carefully checking the condition of the bearing, which may be irreversible damage. In addition, lubricants based on disulfide molybdenum are quickly contaminated, and when the abrasive particles appear in them, the efficiency of combating friction is significantly reduced.

The lubricant created using the molybdenum disulfide is also able to collapse at particularly high temperatures, although these indicators are much larger for it than for the previously mentioned hydrocarbon synthetic agents. Therefore, after a long ride at high speed, it is desirable to regularly lean the lids of the bearings housings to check their condition - the first indicator of their excessive wear will become a bluish color, after which the broken part will begin to manifest itself with a strong buzz. For processing hub bearings, you can use lubricant domestic production, for example, Fiol, and when it can be used, you can buy an more expensive tool SHRUS-4, although it will slightly decrease the service life of the node. If you prefer to use overseas manufacturers, pay special attention to the following brands:

• Texaco;
• Castrol (BP);
• ESSO;
• LIQUI MOLY;
• Mobil.

Based on lithium

Already a long time ago a universal grease was developed, which was based on lithium dissolved in organic acids. When foaming and adding a thickener, a yellowish substance is obtained, which is easily burdened with a finger or a special tool, but it does not fall out of the jar. Lithium lubricants are considered an ideal option to combat friction - they provide a significant reduction in loads, which leads to a decrease in the depreciation rate of individual parts. Due to this, the lifetime of the bearing during processing such a composition increases to the maximum, which allows you to get confidence in the reliability of the chassis of the car. TO strong sides Lithium-based funds include durability - the lubricant does not lose its properties and to 100-110 thousand mileage kilometers, although it is better to replace the part for security.

Due to this, lithium lubricants consider the ideal option to ensure the safety of bearings, although in some other areas the result with their help is not so good. The disadvantage of these funds is the average corrosion resistance in comparison with alternative compositions, therefore, with a violation of the tightness of the bearings, the lubricant material is also worth changed. In addition, the minus is the ability of organic acids based on lithium lubricants to dissolve some polymer compounds. Therefore, before purchasing such funds, pay attention to the instruction manual for the car - it is quite possible that you will find an indication of the inadmissibility of their application.

Now lithium-based lubricant is made only by several foreign companies, among which you need to name British Petroleum, Very Lube and Renolit. However, you can use to protect the wheel bearings and a relatively inexpensive domestic equivalent represented by the means called Litol-24. Unlike other compositions, Litol copes perfectly with elevated loads and high temperatures, providing maximum durability of parts. In addition to the big durability and, the advantage of domestic lubrication can be called widespread - it can be purchased in any car or construction store.

How to lubricate the hub bearing?

To apply lubricant on the hub bearing, you must first get to it. Before disassembling, you should put a car in a flat place and fix it to prevent accidental movement. Before removing the wheels, do not forget to loosen the hub bolt, turning it counterclockwise - if you forget to do it, you will have to spend a lot of extra time. When the bolt is weakened, lift the car to the jack and carefully dismantle the wheel, trying not to thread the threads of his bolts.

Gently unscrew the mounting bolts brake calipers And, holding shoes with hands, remove this item from the wheel hub. To get to the bearings, you may also need to dismantle the ball support and the rack - while you need to unscrew 2-4 bolts, which hold such components and gently take them to the side, not allowing strong blows and oscillations. In some cases, it is necessary to knock off the semi-axis - putting a wooden lining or a wide metal mandrel on it, apply a few non-links and then pull the edge of the hub with your hands.

You will also have to disassemble the hub itself - it is also done with the help of wide metal mandrels, although here you can already be slightly stronger. Reaching the bearing, bulk it using the mandrel size is smaller - be neat so as not to damage the housing housing. Please note that the hub bearing consists of two asymmetrical parts - remember their position to subsequently collect the node correctly. Taking the old parts of the bearing, check that the balls left the balls falling in the hub, as well as the old lubricant - for this you will need to wash the cavity, and then wipe it thoroughly with large paper napkins.

Lubrication of wheel bearings is usually made by hand - special tools are used extremely rare. In total, you will need to fill in one detail about 30-40 grams of thick material, carefully sealing it and watching the uniformity of application. Alternately, set the two parts of the bearing, simply lubricating them with a lack of packing. To significantly speed up the process and not damage the plastic protective casing of the part, use the old bearing instead of the mandrel and hit the hammer on it. Make the hub assembly in the reverse order.

Maximum reliability of the chassis

To decide which lubricant will be to protect the wheel bearings, be sure to pay attention to reading the instruction manual for the car. As a rule, the manufacturer indicates a type of composition that is allowed to use or even a specific product name. If there are no such indications, you can use lithium lubricant, which provides excellent protection against accelerated wear and corrosion. The domestic composition of Litol-24 and foreign analogues have almost the same efficacy of use, so you can not pay attention to the trademark when buying. In addition, an alternative option is a lubricant based on Molybdenum disulfide, although it is not so resistant to moisture and has some other features.