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M1104, M1105, M1106 Heavy-Duty Bench Grinder
MAINTENANCE
MAINTENANCE
Check for the following conditions and repair or
replace when necessary:
• Cracked or loose grinding wheel.
• Loose mounting bolts.
• Worn switch.
• Worn or damaged cords and plugs.
• Any other condition that could hamper the safe
operation of this machine.
This grinder has sealed bearings that require no user
lubrication.
The grinding wheel should be inspected before every
use. Use the ring test method noted in
Changing
Grinding Wheels
on Page 13 to verify the structural
integrity. Take care in storing grinding wheels to keep
them free from potential damage by being dropped, or
having other items drop on them.
Replace the wheel when the wheel diameter is reduced
to 4" for the M1104, 5" for the M1105, or 6
1
⁄2" for the
M1106. Operating at anything less than this diameter
does not allow the proper surface speed for grinding
or spacing of the tool rest and the eye shield, and the
grinding wheel may fly apart.
Depending on the type of grinding you do, the grinding
wheel may require periodic dressing. There are several
different types of wheel dressing devices available on
the market. Use a suitable diamond or silicon carbide
stick type dresser. Sweep it smoothly and evenly several
times across the face of the wheel. Dressing restores the
abrasive quality of the wheel surface, plus it will bring
the wheel edge back to a square form. Refer to the
instructions that accompany your dressing accessory for
complete detail on wheel dressing.
Lubrication & Cleaning
General
MAKE SURE that your machine is
unplugged during all maintenance pro
-
cedures! If this warning is ignored, seri
-
ous personal injury may occur.