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inward. To stop the tool while operating in continuous mode,
press the rear part of the switch and release.
LOCK-ON BUTTON (D28114, D28144)
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.
CAUTION: Allow the tool to reach full speed before touching tool
to the work surface. Lift the tool from the work surface before turn-
ing the tool off.
SPINDLE LOCK
The spindle lock (C) is provided to prevent the spindle from rotat-
ing when installing or 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
CAUTION: Turn off and unplug the tool before making any
adjustments or removing or installing attachments or acces-
sories. Before reconnecting the tool, depress and release the
paddle switch to ensure that the tool is off.
C
J
A
B
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.
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
CAUTION: Turn off and unplug the tool before making any
adjustments or removing or installing attachments or acces-
sories. Before reconnecting the tool, turn the switch on and off
as previously described to ensure that the tool is off.
Depressed center Type 27 grinding wheels
must be used with included flanges.
NOTE: The quick-change wheel release
(G1) is for use with for D28114, D25114N
and D28131. The stamped steel backing
flange (G2) is for use with D28140, D28144
and D28144N. Refer to page 6–8 for more information.
1. Install the unthreaded backing flange (G1) 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.
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
H
G1
D