How to judge the ultimate temperature resistance of motor bearings？

Recently, a customer asked "how high is the ultimate temperature resistance of general motor bearings"? In fact, this problem needs to be analyzed from four aspects, namely the bearing body, cage, seals and grease. Because of it is different temperature limits for the four components. Let us make up for you to briefly talk about it.

First, the body of bearings

Bearing body is bearing inner ring, outer ring and rolling body. These parts are usually made of bearing steel and need to go through the corresponding heat treatment in the production process of motor bearings. Because of its size and accuracy will be relatively stable for the motor bearing in this temperature range. However, the size and stability of bearing parts may change if higher than this temperature. And the internal metal structure of the bearing will also change at the same time, which leads to corresponding changes in the hardness of the bearing.       But different manufacturers have certain differences in the default stable temperature of heat treatment for different types of motor bearings.It is recommended to consult corresponding manufacturers for detailed limits.

Second, the cages of bearings

The most commonly used cage materials for motor bearings are steel, copper (mainly brass) and nylon. Steel and brass material temperature limits do not need to be considered separately of the three materials, and can be almost equal to the temperature limits of the ring. The default temperature range for nylon cages is -30℃~120℃. It is necessary to change the motor bearing selection or other calculations to comprehensively consider its availability if the temperature is higher than this environment for a long time.

Third, the seals of bearings

Usually the seals of sealed bearings are more often used when there are no special requirements. The temperature range of seals made of this material is also between -30℃ and 120℃. Fluorine rubber seals can withstand temperature up to 180℃, but it is very expensive. (Please consult the corresponding manufacturer for the temperature limit of seals of other materials.)

Fourth, the grease

The viscosity of grease will be affected if the temperature of motor bearing rises. And it is necessary to carry out the corresponding check the grease after the viscosity change can meet the application condition. Generally, the temperature range of grease in sealed bearings is about -30℃~120℃. Technicians can choose to use low temperature grease, high temperature grease, wide temperature grease and so on according to working conditions.

Kent Bearing is an enterprise focusing on the research and manufacture of ball bearings with high precision and low noise, and has rich experience in the production and sales of bearings. At present, our products are widely used in motor, automobile, household appliances, power tools, garden tools, fitness equipment, medical equipment, water pumps, mechanical equipment and other fields. We have been well received by many customers adhering to the business philosophy of "the real quality is more durable, so that the bearing rotation is quieter". Welcome to inquiry and feel free let me know if you any interesting.