Troubleshooting
Problem: Grinder bit has become stuck onto the motor shaft
Solution 1: Loosen set screws and push the bit as far down the shaft as possible. Most often the
shaft above where the bit was mounted crusts with glass debris, coolant, hard water residue, etc.
Using a small piece of fine steel wool or scrubby, polish the end of the shaft all the way down to
where the bit rests.
Solution 2: If you can push the bit down as above, but you notice that there is a burr or scar on the
round side of the motor shaft caused by the set screw in the wrong position (it appears as a small
ring cut into the shaft), you will need to polish it out. This can often be done by using the same steel
wool mentioned above, but occasionally it requires stronger abrasives. Be very careful here! You
only want to remove the scar, you do not want to make the shaft smaller. It may be necessary to
use very fine grit emery cloth or sandpaper here. But again, be very careful, the motor shaft can
be easily damaged. Once the scar is polished out, remove the bit. Clean both the bit and shaft and
use lubricant. Never tighten the bit to the round side of the motor shaft.
Solution 3: If the bit is still stuck, use a plumbers helper or vice grip to remove the bit. If further
assistance is necessary, call Diamond Tech toll free at (800) 937-9593 for tech support or to obtain
a Return Authorization Number and further instructions to send your machine in for repair.
Additional Parts and Accessories
ITEM ITEM NUMBER
WORK SURFACE GRID 289
UNIVERSAL FACE SHIELD DM0750
EASY-ON
™
FOOT SWITCH FS0420
MAX SPLASH GUARD P203
GRINDER MOTOR 110V/220V P216/P216A
GRINDER CAPACITOR 110V/220V P221/P221A
SUPER SPONGE REPLACEMENTS 66SUPER
1/4" FAST BIT GH0230
1/4" STANDARD BIT GH0600
3/4" FAST BIT GH0360
3/4" STANDARD BIT GH0350
1" FAST BIT GH0290
1" STANDARD BIT GH0410
ANGLED BIT GH0300
REDUCING BIT GH0310
1" WORK SURFACE ADAPTOR P404
3/4" WORK SURFACE ADAPTOR P224
EASY-GLIDE
™
WORK SURFACE P402
RUBBER DRAIN STOPPER P228
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