Which grease is suitable for the lubrication and protection of rolling bearings?

Go to the bearing store to sell on behalf of you. To look at light load rolling bearings use ordinary 2 or 3 Li.

The purpose of bearing grease is to prevent direct contact between metals and reduce friction and wear inside the bearing through the lubrication formed between the rolling and sliding of the bearing. So what is the role of bearing grease?

The effects of grease on bearings are as follows:

1. Reduce friction and wear, lubricate the parts of the rolling elements and retainers in contact with each other, and prevent friction and wear between metals.

2. Extend the service life of the bearing, the bearing is easy to fatigue the life of the bearing in high-speed operation, and the use of good lubricating grease can prolong the service life of the bearing.

3 Cooling bearings, cooling friction is occurring (generated?) ), or externally induced heat, can lead to the aging of the bearing. Grease prevents overheating of bearings and the aging of the grease itself.

4. In terms of working conditions, such as high and low temperature, corrosive environment, humid environment, water shower environment, etc., these are easy to lead to the generation of foreign bodies, rust of bearings, corrosion of own bearings, etc. Excellent grease prevents foreign matter from entering the interior and preventing rust and corrosion of the bearing.

It is generally lubricating.

The difference between rolling bearing grease and bearing grease is that the grease is paste, and the grease is based on the industrial lubricant with a thickener. The lubricating oil is oily, the lubricating oil has strong fluidity and slightly higher volatility. Grease is generally used on metal surfaces to fill voids and prevent rust.

Lubricating oil can be used in various types of machinery, mainly for lubrication, cooling, rust prevention, cleaning, sealing and buffering. I hope it can help you. If my answer is helpful to you, please give a thumbs up (in the lower left corner), I look forward to your like, your efforts are very important to me, and your support is also the motivation for my progress.

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Select the right grease according to the working conditions, and choose well-known brands with guaranteed quality, such as Krupp Kluber, Shanghai Tiger Head Hotolube, Dr. Bosh, etc.: give you a few common models for our Xu Gong maintenance bearings:

1) For high-speed bearings, fully synthetic high-speed bearing grease is selected;

2) High-temperature bearings, fully synthetic high-temperature motor bearing grease, fully synthetic high-temperature high-speed bearing grease;

3) Heavy-duty bearings, using fully synthetic high-temperature heavy-duty bearing grease;

4) For small and medium-sized bearings or noise reduction, fully synthetic noise-reducing bearing grease is selected;

5) In the water shower environment, fully synthetic water-resistant bearing grease is selected;

In the case of sealed bearings, the appropriate grease is already filled at the time of production; In the case of open bearings, seals are installed to prevent grease leakage, but they are gradually reduced due to a small amount of leakage during use, and they need to be replenished continuously.

It has been proven that the amount of grease injected into the bearing will have a certain impact on its operation. Too little grease injection is easy to cause insufficient lubrication, and in serious cases, it leads to dry friction, generates high heat, and scraps the bearing in a very short time due to wear, which may have a serious impact on the entire equipment. Excessive grease injection will lead to greater rolling resistance of the bearing rolling element, higher grease temperature in the bearing, when reaching its dropping point, it will be turned into liquid and lost, and finally the serious consequences of the above-mentioned grease injection amount too little, and the leakage of grease will cause both waste and environmental pollution.

2. The principle of grease injection is stipulated.

The principle of grease injection: the less the better under the premise of ensuring the full lubrication of the bearing.

Through the summary of practical experience, the following principles are more appropriate.

For open bearings, the appropriate amount of grease injection should be based on the volume of the cavity of the bearing chamber (the part of the air occupied by the internal space contained by the two bearing covers and bearings after the installation is completed, see the blank part except the bearing balls in Figure 2) and the speed of the bearing used (for AC motors, the number of poles can also be used instead of the speed) to briefly calculate the amount of grease

There are many types of sliding bearings, manufacturing materials, credit conditions and importance are quite different, so the requirements for lubricants are different, and the following Chongqing auto parts only make a brief introduction to the lubricants commonly used in sliding bearings. (1) Lubricating oil. Lubricating oil is the most widely used lubricant in plain bearings, and most of the lubricants currently used are mineral oil.

The main indicators of lubricating oil are viscosity, oiliness, extreme pressure, chemical stability, etc., and when selecting lubricating oil, it is necessary to consider speed, load and working conditions. For bearings with large load and high temperature, lubricating oil with high viscosity should be selected, and lubricating oil with low viscosity should be used for bearings with small load and high speed. (2) Grease.

Grease is made by mixing lubricating oil with various thickeners (such as calcium, sodium, aluminum and other metal soaps). Grease is used to form a thin film to isolate the sliding surface. The grease seal is simple and does not need to be added frequently, and it is not easy to be lost.

However, the grease is easy to deteriorate, the friction loss is large, and there is no cooling effect, so it is often used in those occasions where the requirements are not high, it is difficult to supply oil frequently, or low-speed heavy load and infrequent use. (3) Solid lubricants. Commonly used solid lubricants are graphite, molybdenum monosulfide, PTFE and codinghexene.

It is usually a solid lubricant that is blended and lubricated Shan1To make the state, it can also be shamed to cover, sinter, and pour the friction table, and Di Qing will be used in the incarnation lubricant indentation molding into the bearing. Chongqing Auto Parts mentioned that solid lubricants can form a solid film on the friction table to reduce friction resistance, which is usually used in some occasions with special requirements, such as vacuum, high temperature, etc.

The specific problems need to be analyzed in detail, but first we recommend you to use Shell Jiadu S2 V220.

Shell Grate greases can help simplify product inventory with multi-purpose greases, as well as specialised greases (including advanced polyurea-based synthetics) and a range of open gear greases designed for the harshest extreme temperatures, longer service life applications. It can be used in metallurgy, mining, construction machinery, power plants, general manufacturing and auto parts industries. The star product of the Shell GADUS range, GADUS S2 V220 grease is a high-quality, multi-purpose extreme pressure grease formulated with high viscosity index mineral oil and lithium soap base, containing extreme pressure additives and other selected additives, and has extreme pressure (EP) protection.

At the right temperature, the wear resistance and long service life of the product can provide efficient protection for high-speed bearings. The most famous, and well-known to everyone, is that Shell is the first manufacturer in the world to provide lubricants for the A380, the largest passenger aircraft in the history of human aviation, including Jiadu grease.

The use of bearing oil, as well as turbine oil, guide oil, or grease depends on what kind of bearing you are, and the standard of lubricating oil it uses.

The grease selection of high-temperature bearing lubrication depends on the temperature range, and the composite soap grease can be used below 123; About 15 consider using polyurea, and the base oil should be synthetic; More than 18 consider using fluorolipease.

The selection of grease is usually based on four factors: speed, load, bearing size, bearing material, and the working load is limited by the size and speed of the bearing.

When the product of speed and bearing diameter is greater than 400,000, oil lubrication is usually used to lubricate the bearing with grease, pay attention to check the viscosity of the grease base oil, the low viscosity is used for light load, and the high viscosity is used for heavy load.

Answer: The amount of grease used depends on a number of factors, including housing design, bearing speed, characteristics of the grease selected, and ambient temperature. As a rule of thumb, grease should never be used if the operating speed exceeds the grease limit speed listed for the bearing, and once the grease is filled, it usually does not need to be replenished for a long time unless the operating conditions are quite harsh. Lubricating oil should be used if the operating speed exceeds the grease's limiting speed, and oil lubrication applications can be achieved in a number of ways:

Oil bath lubrication, drip lubrication, splash lubrication, circulating system, oil mist lubrication, jet lubrication and oil air lubrication methods. Which method to use depends on a variety of factors, including bearing speed and the application environment. 