9
Switches
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 before laying the tool down.
WARNING:
Before connecting the tool to a power supply, be sure the switch is in
the off position by pressing the rear part of the switch and releasing. Ensure the
switch is in the off position as described above after any interruption in power supply
to the tool, such as the activation of a ground fault interrupter, throwing of a circuit
breaker, accidental unplugging, or power failure. If the switch is locked on when the
power is connected, the tool will start unexpectedly.
NOTE:
To reduce unexpected tool movement, do not switch the tool on or off while
under load conditions. Allow the grinder to run up to full speed before touching the
work surface. Lift the tool from the surface before turning the tool off. Allow the tool
to stop rotating before putting it down.
To run the tool, press the on/off switch (A).
For continuous operation, press the switch completely forward.
To stop the tool, release the switch.
To stop the tool in continuous operation, press on the back part of the switch.
Spindle Lock
The spindle lock (B) is provided to prevent the spindle
B
FIG. 8
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. Do not engage the spindle lock while the
tool is operating because damage to the tool will result. To
engage the lock, depress the spindle lock button and
rotate the spindle until you are unable to rotate the spindle
further.
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
20
˚
-30
˚
FIG. 9
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. 10
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 13 mm (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 8 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.
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 because these wheels are not designed for side pressures encountered
with surface grinding. Wheel breakage and injury may result.
