DeWalt DCG412 Manual De Instrucciones página 70

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
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. 12)
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 27/42 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 63 and 64 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
FIG. 11
tool in a
20˚–30˚
FIG. 12
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.
SURFACE FINISHING WITH SANDING FLAP DISCS (FIG. 13)
1. Allow the tool to reach full speed before touching the tool to the work
surface.
2. Apply minimum pressure to work surface, allowing the tool to
operate at high speed. Sanding rate is greatest when the tool
operates at high speed.
3. Maintain a 5° to 10° 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.
MOUNTING SANDING BACKING PADS (FIG. 2, 14)
WARNING: To reduce the risk of serious personal injury, turn tool
off and remove the battery pack before making any adjustments
or removing/installing attachments or accessories. An accidental
start-up can cause injury.
NOTE: Guard may be removed when using sanding backing pads.
WARNING: Proper guard must be reinstalled for grinding wheel,
cutting wheel, sanding flap disc, wire brush or wire wheel applications
after sanding applications are complete.
1. Place or appropriately thread backing pad (Q) on the spindle.
2. Place the sanding disc (R) on the backing pad (Q).
68
FIG. 13
5˚–10˚