Improper assembly of the outer race of the bearing with the bearing housing bore or the inner race of the bearing with the shaft.
During assembly, the inner holes were not polished and measured, and then new bearings were assembled. Post-testing, excessive temperature increase was observed. Upon disassembly and inspection, it was found that the bearing housing bore was deformed, causing the outer ring of the bearing to be compressed, leading to reduced radial clearance of the bearing, uneven rotation of the rolling elements, and increased wear. The inner race of the bearing had excessive clearance from the shaft, rotating along with the rolling elements and the shaft, and friction caused the bearing to heat up and vibrate.
Improper control of bearing heating temperature during the assembly process.
When the temperature of the bearing heater exceeds the optimal level during the heating process, it can lead to tempering, which reduces hardness and precision. This escalation in bearing temperature can result in increased wear and damage to the bearings.
Improper adjustment of bearing clearance during assembly.
In practical operations, many devices can only be adjusted by feel, and gaps that are too large or too small fail to meet production requirements. If the axial gap is too small, it can easily cause bearing overheating, accelerate pitting, and even lead to the jamming or damage of rolling elements; if the axial gap is too large, the impact force of the moving parts increases, and the stiffness decreases, which can lead to abnormal production operations. Abnormal sounds can even cause severe vibration or damage the cage.
