Grizzly G7299, G7298 instruction manual Maintenance, General, Lubrication, Grinding Wheels

SECTION 6: MAINTENANCE

!Disconnect power to the machine when perform-

ing any maintenance, assembly or adjust- ments. Failure to do this may result in serious personal injury.

General

Always be aware of the condition of your grinder. Routinely check the condition of the following items and repair or replace as necessary:

•Loose mounting bolts

•Worn switch

•Worn or damaged cord

•Worn or damaged support bearings or guide bearings

¥Damaged grinding wheel

¥Any other condition that could hamper the safe operation of this machine.

NOTICE

If the grinder is unmounted from the work- bench for maintenance, the cooling tray can be easily damaged if the grinder is tipped for- ward.

Lubrication

Sealed and pre-lubricated ball bearings require no lubrication for the life of the bearings. All bear- ings are standard sizes, and replacements can be purchased from our parts department or a bearing supply store.

Grinding Wheels

The grinding wheel should be inspected before every use. Use the Òring testÓ method from page 12 ÒWheel MountingÓ instructions to verify the structural integrity. If using coolant during grind- ing, always run the wheel for 5-10 minutes at the end of the operation to remove any coolant from the wheel. Take care in storing grinding wheels to keep them free from potential damage by being dropped or having other items dropped on them.

Replace the wheel when the wheel diameter is reduced to 4" on the Model H4378 and 6" on the Model H4379. Operating at anything less than this diameter does not allow the proper alignment of the tool rest and the eye shield.

Depending on the type of grinding you do, the grinding wheel may require periodic dressing. There are several different types of wheel dress- ing devices available on the market. Use a suit- able diamond or silicon carbide stick type dress- er. 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 details on wheel dressing.

-14- H4378/H4379 Slimline Bench Grinder