DeWalt DWE4012 Instructions Manual page 14

MOUNTING NON-HUBBED WHEELS (FIG. 8, 9)
Depressed center Type 27 grinding wheels must be used with
included flanges. Refer to Accessories and Attachments for more
information.
1. Install the backing flange (D) on spindle (B) 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 (E)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
the threaded clamp nut on the spindle so that the raised section
(pilot) is not against tile wheel.
FIG. 9
Wheels thicker than
1/8" (3.17 mm)
Clamp Nut
Wheels 1/8"
(3.17 mm) and thinner
Clamp Nut
BackingFlange
Backing Flange
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.
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
height of the pilot prevents the clamp nut from holding the wheel.
SURFACE GRINDING WITH GRINDING WHEELS (FIG. 10)
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 FIG.10
tool and work surface.
4. Continuously move the tool in a forward ..........
and back motion to avoid creating 20_30°
gouges in the work surface.
5. Remove the tool from work surface before turning tool off. Allow
the tool to stop rotating before laying it down.
EDGE GRiNDiNG WITH GRINDING WHEELS (FIG. 11}
i_ WARNING: Wheels used for cutting and edge grinding may break
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 1/2" in depth). The open side of the guard must
be positioned away from the opemto_ For deeper cutting with a
Type 1 cut-off wheel, use a closed, Type 1 guard. See the chart on
pages 9-10 for more information. Type 1 guards are available at
extra cost from your local dealer or authorized service cente_
1. Allow the tool to reach full speed before touching the tool to the
work surface.
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