DeWalt DWE4020 Manual De Instrucciones página 50

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. 8)
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. 9)
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" (12.7mm) 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 pages 49 for more information. Type 1 guards are available
at extra cost from your local dealer or authorized service center.
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.
FIG. 8
3. Position yourself so that the open-
underside of the wheel is facing away
from you.
20˚–30˚
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 because these wheels are not designed for side
pressures encountered with surface grinding. Wheel breakage and
injury may result.
SURFACE FINISHING WITH SANDING FLAP DISCS (FIG. 10)
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.
48
FIG. 9
FIG. 10
5˚–10˚