Improper assembly of the bearing outer race with the bearing housing bore or the bearing inner race with the shaft.
During assembly, the inner bore was not polished and measured, and a new bearing was installed. After the test run, an excessive temperature rise was detected. During disassembly and inspection, it was found that the bearing housing bore was deformed, causing the outer race of the bearing to be compressed, thereby reducing the radial clearance of the bearing, uneven rotation of the rolling elements, and increased wear. The clearance between the inner race of the bearing and the shaft was too large, allowing the inner race to rotate along with the rolling elements and the shaft, resulting in friction that caused the bearing to heat up and vibrate.
Improper control of bearing heating temperature during assembly.
When the temperature of the bearing heater exceeds the safe limit during the heating process, it can cause tempering, which reduces hardness and precision. This increase in bearing temperature can lead to accelerated wear and damage.
Improper adjustment of bearing clearances during assembly.
In practical operations, many machines can only be adjusted by feel, and gaps that are too large or too small often 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 will increase, and the stiffness will decrease, which can lead to abnormal operation in the production process. Abnormal sounds can even cause severe vibration or damage to the cage.
