DeWalt XR Li-ion DCG412 Manuel D'instructions page 56

EnGLIsh

WARNING: Hold the side handle and body of the tool
firmly to maintain control of the tool at start up and
during use and until the wheel or accessory stops rotating.
Make sure the wheel has come to a complete stop be fore
laying the tool down.

WARNING: Allow the tool to reach full speed before
touching tool to the work surface. Lift the tool from the
work surface before turning the tool off.
Spindle Lock (Fig. A)
The spindle lock 3 is provided to prevent the spindle from
rotating when installing or removing wheels. Operate the
spindle lock only when the tool is turned off, unplugged from
the power supply, and has come to a complete stop.
NOTICE: To reduce the risk of damage to the tool, do
not engage the spindle lock while the tool is operating.
Damage to the tool will result and attached accessory
may spin off possibly resulting in injury.
To engage the lock, depress the spindle lock button
and rotate the spindle until you are unable to rotate the
spindle further.
Using Depressed Centre Grinding Wheels
Surface Grinding with Grinding Wheels
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

WARNING: Wheels used for cutting and edge grinding
may break or kickback 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 13 mm 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. Please refer to the Grinding and cutting
accessory chart at the end of this section to see other
accessories that can be used with these grinders.
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.
54
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 serious personal injury
may result.
Using Wire Brushes and Wire Wheels
Wire wheels and brushes can be used for removing rust, scale
and paint, and for smoothing irregular surfaces.
nOTE: Please refer to Precautions To Take When Wire
Brushing Paint.
3
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. Material removal rate is greatest
when the tool operates at high speed.
3. Maintain a 5° to 10° angle between the tool and work
surface for wire cup brushes.
4. Maintain contact between the edge of the wheel and the
work surface with wire wheels.
5. Continuously move the tool in a forward and back motion to
avoid creating gouges in the work surface. Allowing the tool
to rest on the work surface without moving, or moving the
tool in a circular motion causes burning and swirling marks
on the work surface.
6. Remove the tool from the work surface before turning
the tool off. Allow the tool to stop rotating before setting
it down.

CAUTION: Use extra care when working over an edge, as
a sudden sharp movement of grinder may be experienced.
Using Cutting (Type 1) Wheels

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.
1. Allow tool to reach full speed before touching tool to
work surface.
2. Apply minimum pressure to work surface, allowing tool to
operate at high speed. Cutting rate is greatest when the tool
operates at high speed.
3. 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.
4. Remove the tool from work surface before turning tool off.
Allow the tool to stop rotating before setting it down.