How to measure the bearing temperature? What is the allowable temperature of the bearing?

Bearing temperature can be measured by using the method of thermometer or embedded temperature gauge. There is a good heat transfer between the gage and the inspected part, and all air gaps should be filled with the heat conduction paint.

Bearing the allowable temperature: sliding bearing oil temperature is less than or equal to 65 DEG C) is 80 DEG C; rolling bearings (less than or equal to environmental temperature of 40 DEG C) is 95 DEG.