The motor is directly connected to the reducer via rolling keys; I want to know what causes this
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The motor is connected directly to the reducer via a rolling key; after installing a new key and running the equipment for 2 hours, abnormal noises appeared. I would like to know what could be causing this issue. Dozens of similar devices in the company are experiencing the same problem. The motor shaft has a diameter of 28 mm, and the key used is of 8*7 size
The continuous rolling of the key between the motor and the reducer may be caused by an inappropriate size of the key selected. If the key is too small or of poor quality, it is prone to key rolling. Furthermore, aging or damage to the bearings of the reducer can also cause noise problems. Regarding the specific situation you mentioned, since similar problems have occurred with devices of the same type, it is recommended that you first check whether there are any issues with the reducer bearings. At the same time, consider replacing the key with one that is larger in size and of better quality to see if that can resolve the issue. If the problem persists, it is recommended to consult a professional technician for a more thorough inspection and repair. .
If the clearance between the motor shaft and the reducer is large, it is not possible to check whether they are concentric during motor installation; moreover, there is a risk that the key may experience frictional forces or alternating stresses while in operation