4.An undamaged wheel will emit a clear metal- lic ring or “ping” sound in each of these spots. A damaged wheel will respond with a dull thud that has no clear tone.
5.If you determine from the ring test that the wheel is damaged, DO NOT use it!
Replacing Wheels
The wheel guard assembly must be removed in order to mount or dismount a grinding wheel.
The hazards of using a damaged wheel include flying chunks of sharp abrasive material that could cause serious injury or death. Inspect every grinding wheel before it is mounted and DO NOT use a damaged grinding wheel!
To remove/mount a wheel:
1.DISCONNECT THE MACHINE FROM THE POWER SUPPLY!
2.Remove the three Phillips head screws and nuts that go through the outer guard. Take off the outer guard and the rim guard.
3.Use a wrench on the nut that holds the wheel on the arbor. Hold the wheel from turning with your other hand.
Note: The grinding wheel arbor has a left- handed thread, so loosening the nut will require turning it clockwise.
4.Remove the outer wheel flange and paper disc. Pull the wheel free from the arbor. There will also be a paper disc and a wheel flange on the back side of the wheel which should also be removed.
5.Mount the new wheel in the reverse order or as shown in Figure 12. Always make certain there is are paper or fiber discs between the wheel flanges and the wheel itself. Tighten the nut snugly but DO NOT
Paper/Fiber
Disc
Flange | Flange |
Wheel 
Paper/Fiber
Disc Nut
Figure 12. Wheel mounting order.
Omitting the paper discs during assembly can put undue stress on the wheel, causing it to crack and possibly fall apart! NEVER assemble a grinding wheel on the arbor without paper or fiber discs between the wheel and the flanges.
6.
7.Run a new wheel for at least one minute while standing clear of the line of rotation. If a wheel does have defects it will generally fail as soon as it gets up to full speed.
H7760 2" x 27" Belt Sander & 6" Grinder |