DeWalt D28065 Guide D'utilisation page 17

FIG. 9
Wheels 1/8" (3.17 mm)
and thinner
G1
6"
Type 27 depressed center wheels
H
G2
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
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.
Wheels thicker than
1/8" (3.17 mm)
H
FIG. 10
20˚-30˚
EDGE GRINDING WITH GRINDING WHEELS (FIG. 11)
CAUTION: Wheels used for edge grinding and cutting may break
or kick back if they bend or twist while the tool is being used to do
cut-off work. In all edge grinding/cutting operations, the open side of
the guard must be positioned away from the operator. Edge grinding/
cutting with a Type 27 wheel must be limited to shallow cutting and
notching—less than 1/2" (13 mm) in depth when the wheel is new.
Reduce the depth of cutting/notching equal to the reduction of the
wheel radius as it wears down. Refer to pages 9 – 11 for more
information. Edge grinding/cutting with a Type 1 wheel requires usage
of a Type 1 guard.
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. Position yourself so that the open-underside of the wheel is
facing away from you.
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 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.
WARNING: Do not use edge grinding/cutting wheels for surface
grinding applications if the wheel label has forbidden such use
because these wheels are not designed for side pressures encountered
with surface grinding. Wheel breakage and serious personal injury may
result.
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