Grinding Wheels; Changing Grinding Wheels - Delta GR275 Instruction Manual

GRINdING WHEELS

The use of accessories and attachments not recommended by delta may result in risk of injuries.
Use attachments with this grinder that are rated for 3600 RPM or higher and are 6" (152 mm) in diameter with a 1/2"
(12.7 mm) arbor hole. Two aluminum oxide grinding wheels are supplied with your grinder - one 36 grit and one 60 grit.
For best grinding results, and to maintain good balance, always keep the wheels properly dressed. Do not force the
work against a cold wheel. Run the grinding wheel at idle speed for one full minute before applying the workpiece.
balanced wheels with your grinder to add years to the life of the bearings.
Always maintain a distance of 1/8" (3.2 mm) or less between the grinding wheel and the tool rest.
Adjust the tool rests and spark guards as the grinding wheels decrease in size with use.
dRESSING A GRINdING WHEEL
Use a suitable silicone carbide stick type dresser or the
wheel dresser provided with the grinder (Fig. 11). Bring
the dresser forward on the tool rest until it touches the
high point on the face of the wheel. Dress the wheel by
moving the dresser back and forth. Repeat this operation
until the face of the grinding wheel is clean and the corner
of the wheel is square.

CHANGING GRINdING WHEELS

disconnect the machine from the power source!
1. Remove the knobs (A) Fig. 12.
2. Rotate (toward the rear) and remove the wheel covers (B) Fig. 12.
3. Pull the two arbor nut wings out (A) inset Fig. 12). To loosen, place the supplied wrench (A) Fig. 13 on the flats of the
motor shaft. Brace it on the tool rest to keep the shaft from turning. Remove the arbor nut (B) by turning it toward the
front of the grinder.
Fig. 12
B
B
A
A
11
Fig. 11
A
Use
Fig. 13