Allowable operating temperature of precision rolling bearings

 

 

Abstract:

The operating temperature of BRZB precision rolling bearings depends on bearing material, preload, operating load, speed, lubrication, cooling, and ambient temperature. In general, the higher the load and speed, the higher the operating temperature of grease lubrication bearings.

Key words: Operating temperature; precision rolling bearings; grease lubrication bearings; high temperature bearings; precision angular contact ball bearings.

The operating temperature of BRZB precision rolling bearings depends on bearing material, preload, operating load, speed, lubrication, cooling, and ambient temperature. In general, the higher the load and speed, the higher the operating temperature of grease lubrication bearings.

 

BRZB precision rolling bearing rings can usually withstand temperature 150℃; while the phenolic resin cages can withstand the maximum temperature 120℃. Other bearings with copper or aluminum alloy cages can withstand the maximum temperature 150℃.

 

Without artificial cooling and external heat, the inner ring temperature is always higher than outer ring temperature. The temperature of rolling elements is higher than that of inner ring.

 

Overheating can change bearing internal state. For precision angular contact ball bearings in high speed, the temperature difference between inner ring and outer ring will cause the larger actual preload than assembly preload, and lead to premature abrasion, bearing stuck and even worse situation. Therefore, bearing operating temperature must be controlled.

 

According to the lubrication methods and cooling situation, the allowable operating temperature of oil mist and oil-air lubrication bearings is much higher than that of grease lubrication bearings.

 

If higher temperature bearings are requested, please contact us via email sales@brzbearing.com.