Use and Care Manual
11
4. In normal use, grinding wheels may become cracked, grooved, rounded at the edges, chipped, out of true or 
loaded with foreign material. Cracked wheels should be replaced IMMEDIATELY. While any of the other condi-
tions can be remedied with a dressing tool (included), new wheels sometimes require dressing to make them round.
5. If you must replace a wheel be sure to obtain one with a safe rated speed at least as high as the “NO LOAD” RPM 
marked on your grinder’s nameplate. Test new wheels for cracks and maintain the existing sequence of retaining 
hardware. Be sure the tool is unplugged before attempting repairs.
6. This unit has sealed lubrication within the bearings in the motor housing. No additional lubrication is required.
CHANGING THE GRINDING WHEELS
Grinding wheels should be inspected before each use. 
Store  the  grinding  wheels  to  prevent  them  from  the 
potential hazards of moisture, containments and other 
damage.
To replace a grinding wheel:
1. Disconnect the grinder from the power supply.
2. Rotate the eye shield out of the way in order to ac-
cess the tool rest.
3. Loosen the tool rest knob and position the tool rest 
away from the grinding wheel.
4. Remove the three screws (Fig. C - 1) found around 
the outside of the wheel guard in order to remove the 
wheel cover.
MAINTENANCE
5. Using a crescent wrench and the box end of the included wrench, remove the arbor hex nut (Fig. C - 2) found on 
the outside edge of the grinding wheel. 
NOTE: The left side hex nut is loosened by using a clockwise wrench rotation while the right side hex nut is loos-
ened with a counterclockwise rotation.
6. Remove the outer wheel flange (Fig. C - 3) and set it to the side. Now you can freely remove the old grinding 
wheel.
7. Replace the abrasive wheel with a new grinding wheel rated to safely operate at a higher RPM than the max speed 
of the grinder (over 3450 RPM). Make sure both the outer diameter and the arbor size of the replacement wheel 
adequately meet the standards of this grinder. Do not remove labels from the grinding wheels.
8. Once the wheel has been replaced, reattach the outer flange and the arbor hex nut. Do not overtighten any flanges 
or nuts, as this can dig into the abrasive wheel, creating a risk of injury.
9. Replace the wheel cover, the knobs, the tool rest and the eye shield. Make sure all guards, shields and tool rests 
are correctly positioned before operation. 
1
Fig. C
2
3










