- The bearing is damaged. Should be replaced.
- Too little or too much grease in rolling bearings or impurities such as iron filings. The capacity of bearing grease should not exceed 70% of the total volume, and those with impurities should be replaced.
- The shaft and bearing fit too tightly or too loosely. When it is too tight, it should be re-grinded, and when it is too loose, the shaft should be set.
- The bearing and end cover are too tight or too loose. The bearing chamber is processed when it is too tight, and a steel sleeve is inserted in the end cover when it is too loose.
- Poor assembly of the motor end cover or bearing cover. Install the end cap or bearing cap stop, install it flat, and tighten the screws.
- The belt is too tight or the coupling is poorly assembled. Adjust the belt tension and correct the coupling.
- There is too little lubricating oil in the sliding bearing, there are impurities or the oil ring is stuck. Refuel, replace with new oil, repair or replace the oil ring.