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12
CAUTION: Make sure the wheel has come to a complete stop be fore setting the
tool down.
SPINDLE LOCK BUTTON (FIG. 9)
The spindle lock button (D) is provided to prevent the spindle
FIG. 9
D
from rotating when installing or removing wheels.
NOTICE: To reduce the risk of damage to the tool, do not
engage the spindle lock button while the tool is operating.
Damage to the tool will result and attached accessory may
spin off possibly resulting in injury.
To engage the lock, depress the spindle lock button (D) and
rotate the spindle until you are unable to rotate the spindle further.
Mounting and Using Depressed Center Grinding Wheels and
Sanding Flap Discs
MOUNTING AND REMOVING HUBBED WHEELS
Hubbed wheels install directly on the M14 x 2 threaded
spindle.
1. Thread the wheel on the spindle by hand, seating the
wheel against the spindle shoulder.
2. Depress the spindle lock button and use a wrench to
tighten the hub of the wheel.
3. Reverse the above procedure to remove the wheel.
CAUTION: Failure to properly seat the wheel against
the spindle shoulder before turning the tool on may result
in damage to the tool or the wheel.
MOUNTING NON-HUBBED WHEELS
Depressed center, Type 27 grinding wheels must be used
with available accessory flanges. See the chart on pages
10–11 of this manual for more information.
1. Install the metal backing flange (Q) on spindle (E)
against the spindle shoulder.
2. Place wheel against the backing flange, centering the wheel on the backing flange
pilot.
FIG. 10
Q
E
R
3. While depressing the spindle lock button, thread the clamp nut (R) on spindle,
piloting the raised hub on clamp nut in the center of grinding wheel.
4. Tighten the clamp nut with a wrench.
5. Reverse the above procedure to remove the wheel.
SURFACE GRINDING WITH GRINDING WHEELS
(FIG. 11)
1. Allow the tool to reach full speed before touching the tool to the work surface.
2. Apply minimum pressure to the work surface, allowing the tool to operate at high
speed. Grinding rate is greatest when the tool operates at high speed.
3. Maintain a 20° to 30° angle between the tool and work surface.
4. Continuously move the tool in a forward and back
FIG. 11
20˚–30˚
motion to avoid creating gouges in the work
surface.
5. Remove the tool from work surface before
turning tool off. Allow the wheel to stop
rotating before laying the tool down.
EDGE GRINDING WITH GRINDING WHEELS (FIG. 12)
WARNING: Wheels used for cutting and edge grinding
FIG. 12
may break or kickback if they bend or twist while the
tool is being used to do cut-off work or deep grinding.
To reduce the risk of serious injury, limit the use of these
wheels with a standard Type 27 guard to shallow cutting
and notching (less than 13 mm [1/2"] in depth). The
open side of the guard must be positioned away from
the operator. For deeper cutting with a Type 1 cut-off
wheel, use a closed Type 1 guard. Refer to pages 10–11
for more information.
1. Allow the tool to reach full speed before touching
the tool to the work surface.
2. Apply minimum pressure to the work surface, allowing the tool to operate at high
speed. Grinding rate is greatest when the tool operates at high speed.