Bench Grinder: Grinding Wheel Wobbles
Wobbly wheels on your bench grinder is a common problem and can present dangers. If this is the case, check these parts: the collar, grinding wheel, shaft, and shaft nut. Before sourcing outside help, use our troubleshooting guide to help you complete your own DIY repair - It might be easier than you think. Always reference your owner's manual for instructions specifically tailored to your model.
Nuts
If the shaft nut in your bench grinder is loose, it will not be able to secure the grinding wheel, which will make it wobble. If this happens, make sure to replace the nut to fix this problem.
Shafts
The shaft is a vital part of your bench grinder and if it is bent it can cause the grinding wheels to lose balance and wobble. It is important to replace the shaft and install it the right way to stabilize the wheel and prevent it from wobbling or making odd noises.
Wheels
If the grinding wheel in your bench grinder has a worn-out shaft adapter, it will begin to wobble and move around. Replace the grinding wheel to fix this problem by first removing the safety guard. Remove main body of the appliance by unscrewing the screws located in various spots. Locate the shaft and use a wrench to remove the nut and washer. Replace the new wheel in the same position as the old one. To install the new wheel, slide it to the furthest position and reassemble. Tip: test the wheel by switching the bench grinder on and listening for any unusual movement or sounds. ... Read more
Collar
If the collar, also known as the flange, is loose and not secured tightly against the grinding wheel, it can cause the grinding wheel to wobble. Replace the collar to fix this problem.