M1104, M1105, M1106
MAINTENANCE
General
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.
Lubrication & Cleaning
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.
MAKE SURE that your machine is unplugged during all maintenance pro- cedures! If this warning is ignored, seri- ous personal injury may occur.