DeWalt D28112 Guide D'utilisation page 15

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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.
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.
FIG. 11
1/4" (6.35 mm)
WHEELS
CLAMP NUT
BACKING FLANGE
SURFACE GRINDING WITH GRINDING WHEELS (FIG. 12)
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 motion to avoid
creating 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. 13)
CAUTION: 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 operator. For deeper cutting with a Type 1
cut-off wheel, use a closed, Type 1 guard. See the chart on page 10
for more information. Type 1 guards are available at extra cost from
1/8" (3.17 mm)
your local dealer or authorized service center.
WHEELS
1. Allow the tool to reach full speed
before touching the tool to the work
CLAMP NUT
surface.
2. Apply minimum pressure to the
work surface, allowing the tool to
operate at high speed. Grinding rate
BACKING FLANGE
is greatest when the tool operates
at high speed.
3. Position yourself so that the open-
underside of the wheel is facing
away from you.
FIG. 12
4. Once a cut is begun and a notch is
established in the workpiece, do not
change the angle of the cut. Changing the angle will cause the
20˚-30˚
wheel to bend and may cause wheel breakage. Edge grinding
wheels are not designed to withstand side pressures caused by
bending.
5. Remove the tool from the work surface before turning the tool off.
Allow the tool to stop rotating before laying it down.
14
FIG. 13