Grinder: Motor Spins but Grinding Wheel Doesn't
If the motor spins but the grinding wheel doesn't on your grinder, chances are that one of these parts will need to be replaced: the gears, flange, spindle, and coupler. Read our troubleshooting guide for tips on how you can fix this common issue yourself as quickly and easily as possible. Refer to your owner's manual for specific instructions for your model.
Reinstall the retaining ring, followed by the bearing, using a socket that only makes contact with the inner bearing race to avoid damage. Tap into place with a hammer. With the spindle box assembly removed, you can inspect the armature gear inside the gear housing....
Reinstall the retaining ring, followed by the bearing, using a socket that only makes contact with the inner bearing race to avoid damage. Tap into place with a hammer. With the spindle box assembly removed, you can inspect the armature gear inside the gear housing.
To replace the armature gear, remove the housing off the grinder. Remove the retaining clip, or nut, and pull the gear off. Install the new armature gear and reinstall the retaining ring or nut. Reassemble the gear housing onto the grinder. Repack the spindle box with fresh grease and then reinstall the spindle box assembly to the gear box housing. Reattach the wheel cover and handle. Then, reinstall the grinder wheel, with flanges, and secure with the lock nut.
To replace a broken spindle, begin by removing the wheel cover and the handle. Remove the spindle box assembly from the gear box housing. Depending on your model, the bearing and gear placement may be in reversed position on the spindle. Remove the spindle bearing using a bearing separator or a bearing puller. Remove the retaining ring, wave washer – if your unit has one – and the spindle gear, with the woodruff key. Remove the spindle housing from the spindle, followed by the labyrinth ring.
Install the parts in reverse order onto the new spindle. Make sure the...
To replace a broken spindle, begin by removing the wheel cover and the handle. Remove the spindle box assembly from the gear box housing. Depending on your model, the bearing and gear placement may be in reversed position on the spindle. Remove the spindle bearing using a bearing separator or a bearing puller. Remove the retaining ring, wave washer – if your unit has one – and the spindle gear, with the woodruff key. Remove the spindle housing from the spindle, followed by the labyrinth ring.
Install the parts in reverse order onto the new spindle. Make sure the woodruff key stays in place when installing the spindle gear. When installing the bearing, place a socket that only makes contact with the inner race of the bearing to avoid damage. Tap in place with a hammer. Pack the spindle box assembly with new grease and then reattach the spindle assembly box to the gear box housing. Install the wheel cover and handle. Reinstall the inner flange, grinding wheel and outer flange onto the spindle and tighten with the lock nut.