Operating The Bench Grinder; Grinding Speed Chart - Craftsman 152.21152 Owner's Manual

Fig. L
4.
5.
6.
7,
Allow the grinding wheels to come up to a steady
speed for at least one minute. The R.P.M.'s of the
Bench Grinder can be now increased to the desired
speed for the particular grinding operation by
rotating the Variable Speed Switch clockwise.
The Flexible Work Light may be turned "ON" if desired.
Adjust the eyeshields. Place the workpiece on the
appropriate tool rest for the desired operation.
Move the workpiece towards the grinding wheel
until it lightly touches. Move the workpiece back
and forth across the front surface of the grinding
wheel removing the amount of material desired.
The Bench Grinder is designed for hand held grinding,
sharpening, and cleaning operations.
ALWAYS WEAR EYE PROTECTION! Hot sparks are
produced during grinding operations.
Sharpening and removal of metal can be done on the
right side of the Bench Grinder using the grinding wheel.
Cleaning of metal surfaces can be done using the wire
wheel on the left side of the Bench Grinder.
GRINDING SPEED CHART
Low Speed 2000 RPM High Speed 3450 RPM
Light Duty Operations Heavy Duty/Normal Operations
Lightgrinding Heavy grinding
Sharpening Stock removal
Rust and paint removal Deburring
Lowered grinding temperature Buffing
1.
The Power Switch must be in the "OFF" position
(see Fig. L) and the Variable Speed Switch must be
turned to its slowest setting by being turned all the
way to the left until solid resistance is felt.
2. Stand to the side of the Bench Grinder and plug in
the power cord to a suitable power source.
3. Remain to the side of the Bench Grinder and turn it
"ON" by moving the power switch to the up position.
To avoid serious injury, never grind on the sides of
the grinding wheels.
8,
If the Drill Bit Sharpening Plate was installed earlier,
lay the drill bit flat in the "V" groove. Firmly hold on to
the drill bit shank. Slide the drill bit towards the
grinding wheel until it lightly touches. Keep the drill
bit flat to the plate and rotate the drill bit.
9. The operator may place the hot end of the
workpiece intothe water in the quench tray to cool it.
10.
After completing the grinding operations, turn "OFF"
the Bench Grinder by pushing down on the Power
Switch. CAUTION: It will take a few minutes for the
grinding wheels to come to a complete stop.
11. Turn the Variable Speed Switch counterclockwise to
return it to its slowest setting.
12. Turn "OFF" the Flexible Work Light.
CAUTION: The Flexible Work Light housing will
remain hot for a few minutes after turning it "OFF".
13. Avoid contact with housing until it is cool. Unplug the
Bench Grinder from the power source.
NOTE: To prevent unauthorized use of the Bench
Grinder, the power switch has a removable locking key.
With the power switch in the "OFF" position, pull the
locking key out. The Bench Grinder cannot be turned
"ON" with the key removed. Insert the locking key to
resume grinding operations.
11