1. Improper fit between bearing components during assembly
During the assembly process, without polishing the inner hole and measuring its dimensions, a new bearing was installed. After the test run, an excessive temperature rise was observed. When disassembling for inspection, it was found that the bearing seat hole was deformed, which squeezed the outer ring of the bearing, reducing the bearing's radial clearance. This led to uneven rotation of the rolling elements and increased wear. When the clearance between the bearing inner ring and the shaft is too large, the bearing inner ring rotates together with the rolling elements relative to the shaft, and the resulting friction causes the bearing to heat up and vibrate.
2. Incorrect control of bearing heating temperature during assembly
When the temperature of the bearing heater is set too high during the heating process, it can cause the bearing to undergo tempering, reducing its hardness and dimensional accuracy. This increases the bearing's operating temperature, leading to accelerated wear and potential damage.
3. Improper adjustment of bearing clearance during assembly
If the bearing clearance is adjusted too small, it can restrict the normal movement of the rolling elements, causing increased friction, heat generation, and premature wear. Conversely, if the clearance is too large, it may lead to unstable operation, excessive vibration, and reduced load - carrying capacity of the bearing.
