Both required by the high-precision bearings for high speed bearing and required by the high temperature bearings, so when you consider its fit and clearance to take into consideration the following two points:
(1) when the room temperature rises to high temperature dimensional change and hardness changes;
(2) high speed centrifugal force caused by the forces of change and shape change.
In short, under the conditions of high speed, high temperature, from the selection of fit and clearance to strive to maintain the accuracy of bearing and work on performance, this is difficult.
Lubrication for operation and service life of the bearings have an extremely important effect, here to brief you choose general principle of grease. Grease is made of base oils, thickeners and additives, different types and a description of different grades of lubricating grease performance varied widely, allowing rotation limit of different, when you choose it is important to note. Grease performance mainly decided by the base oil, low viscosity base oil suitable for low temperature, high speed, high viscosity suitable for high temperature, high-load. Bearing lubrication performance thickening agent, thickening agent for water resistance determines the resistance of lubricating grease to water. In principle, different brands of lubricant cannot be mixed, and, even if it is the same the grease thickener, also will bring bad effects due to different additives.
Lubricate bearings, grease, the more the better, this is a common misconception. Bearings and bearing Interior too much grease will cause the excessive mixing of oils, which results in extremely high temperatures. Filling quantity of lubricant to the bearing with the bearing Interior 1/2~1/3, high speed should be reduced to one-third.
When installing not to direct hammering and non-bearing end bearing surface, should be to block, sleeve or other installation tools the bearing uniform force, not by rolling power installation. If the mounting surface coated with a lubricant will make installation more smooth. Interference combined with larger bearings placed in mineral oil should be heated to 80~90℃ as soon as possible after installation, strict control of oil temperature of not more than 100 ° c, to prevent the effect of tempering hardness reducing the impact and recovery. Removal is difficult, it is recommended that you use the removal tool to pull the inner ring at the same time carefully perfuse hot oil, heat the bearing inner ring expansion, making it more prone to shedding.

 


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