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DeWalt D28112 Instruction Manual page 14

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LOCK-ON BUTTON (FIG. 8}
D28402
The lock-on button (J) offers increased
comfort in extended use applications. To
lock the tool on, push the lock-off lever
(B) toward the back of the tool then
depress the paddle switch (A). With the
tool running, depress the lock-on button
(J). The tool will continue to run after the
paddle switch is released. To unlock the tool, depress and release the
paddle switch. This will cause the tool to stop.
A CAUTION: Allow the tool to reach full speed before touching tool
to the work surface. Lift the tool from the work surface before turning
the tool off.
SPINDLE LOCK (FIG. 9)
The spindle lock (C) is provided to prevent
FIG.9
the spindle from rotating when installing or
O
removing wheels. Operate the spindle lock
only when the tool is turned off, unplugged
from the power supply, and has come to a
complete stop. Do not engage the spindle
lock while the tool is operating
because
damage to the tool will result. To engage the
lock, depress the spindle lock button 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 5/8"-11
threaded spindle.
Thread of accessory must match thread of spindle.
1. Backing flange is retained to the grinder by an O-ring on the
spindle. Remove backing flange by pulling and twisting flange
away form the machine.
2. Thread the wheel on the spindle by hand.
3. Depress the spindle lock button and use a wrench to tighten the
hub of the wheel.
4. Reverse the above procedure to remove the wheel.
A CAUTION:
Failure to properly seat the wheel before turning the
tool on may result in damage to the tool or the wheel
MOUNTING
NON-HUBBED
WHEELS (FIG. 10, 11}
Depressed center Type 27 grinding wheels must be used with
included flanges. See page 9 of this manual for more information.
1. Install the unthreaded backing flange (G) on spindle (D) with the
raised section (pilot) against the wheel. Be sure the backing flange
recess is seated onto the flats of the spindle by pushing and
twisting the flange before placing wheel.
FIG.10
2. Place wheel against the backing flange, centering the wheel on
the raised section (pilot) of the backing flange.
3. While depressing the spindle lock button, thread the clamp nut
(H) on spindle. If the wheel you are installing is more than 1/8"
(3.17 mm) thick, place the threaded clamp nut on the spindle so
that the raised section (pilot) fits into the center of the wheel. If
the wheel you are installing is 1/8" (3.17 mm) thick or less, place
13

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