DeWalt D28143 Instruction Manual page 12

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
accessories. 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. See
page 6 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.
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" (3.31mm) 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" (3.31mm) thick or less,
place the threaded clamp nut on the
spindle so that the raised section (pilot)
is not against the wheel.
4. While depressing the spindle lock button, tighten the clamp nut
with a wrench.
5. To remove the wheel, depress the spindle lock button and
loosen the threaded clamp nut with a wrench.
G
NOTE: If the wheel spins after the clamp nut is tightened, check the
orientation of the threaded clamp nut. If a thin wheel is installed with
the pilot on the clamp nut against the wheel, it will spin because the
D
height of the pilot prevents the clamp nut from holding the wheel.
SURFACE GRINDING WITH GRINDING WHEELS
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.
H
3. Maintain a 20˚ to 30˚ angle between
the tool and work surface.
4. Continuously move the tool in a forward
1/4" WHEELS
and back motion to avoid creating
(6.35 mm)
gouges in the work surface.
5. Remove the tool from work surface before turning tool off. Allow
Clamp Nut
the tool to stop rotating before laying it down.
EDGE GRINDING WITH
GRINDING WHEELS
Backing Flange
CAUTION: Wheels used for cutting and
edge grinding may break if they bend or twist
1/8" WHEELS
while the tool is being used to do cut-off work
(3.31 mm)
or deep grinding. To reduce the risk of
serious injury, limit the use of these wheels
Clamp Nut
with a standard Type 27 guard to shallow
cutting and notching (less than 1/2" in depth).
The open side of the guard must be positioned
away from the operator. For deeper cutting
Backing Flange
10
20˚-30˚