8
9
OPERATION
WARNING
To reduce the risk of injury,
wear safety goggles or glasses with side
shields.
Installing/Removing Accessories
Make sure the grinding wheel does not extend
beyond the bottom of the guard. Threaded hub
grinding wheels may require a deeper guard (see
"Accessories").
1. Unplug the tool.
2. Properly position the guard (Fig. 2).
WARNING
To reduce the risk of injury,
always unplug tool before attaching or remov-
ing accessories or making adjustments. Use
only specifi cally recommended accessories.
Others may be hazardous.
WARNING
Only use accessories with
Maximum Safe Operating Speed rated at
least equal to the maximum speed marked
on the power tool. This speed is based on
the strength of the wheel, allowing for a
reasonable measure of safety. It is not meant
to imply a best or most effi cient operating
speed. Do not exceed the Maximum Safe
Operating Speed.
WARNING
To reduce the risk of injury,
the operator should be instructed in the use,
care and protection of grinding wheels.
Fig. 2
Operator's Zones
Flange nut
position for
1/8" thick or less wheels
Spindle
Flange
Grinding
wheel
Flange nut
Fig. 4
Fig. 3
1/8"
1/4"
Fig. 5
For best result use only this portion of disc
Hold at a
Hold at a
5° to 15° angle
5° to 15° angle
Controlled Start (6116-30, 6116-31, 6116-33,
6123-30, 6123-31, 6160-30, 6160-31, 6160-33)
The controlled start feature reduces the torque
reaction "jerk" when its trigger is pulled.
Constant Speed Tachometer (6116-30, 6116-31,
6116-33, 6123-30, 6123-31, 6160-30, 6160-31,
6160-33)
The constant speed tachometer keeps the tool's
revolutions per minute at an almost constant
speed even under load. The tachometer also helps
prevent tool overheating. The tool switches itself
off automatically when the motor is overloaded. If
this happens, release the trigger to reset. Pull the
trigger and continue work.
USING GRINDING WHEELS
Slide Switch Operation
(6116-33, 6140-33, 6148-33, 6160-33)
To
start
the tool, grasp the handle and side handle
fi rmly and slide the switch to ON.
To
stop
the tool, release the switch. Make sure
the tool comes to a complete stop before laying
the tool down.
To
lock-on
the switch, slide the switch to ON and
press down on the front of the switch. To stop the
tool, press and release the switch. Make sure the tool
comes to a complete stop before laying it down.
Paddle Switch Operation (6116-30, 6116-31,
6140-30, 6148-30, 6148-31, 6160-30, 6160-31)
To
start
the tool, grasp the handle and side handle
fi rmly. Pull the lock-off button back and squeeze
the paddle switch.
To
stop
the tool, release the paddle switch. Make
sure the tool comes to a complete stop before lay-
ing the tool down.
To
lock-on
the switch (6116-30, 6140-30, 6148-30,
6160-30 only), start the tool and push in the lock-
on button. To stop the tool, squeeze and release
the paddle switch. Make sure the tool comes to a
complete stop before laying the tool down.
Care of Grinding & Cut-Off Wheels
Grinding/cut-off wheels should be protected from:
• wetness and extreme humidity
• any type of solvent
• extreme changes in temperature
• dropping and bumping
Grinding and cut-off wheels should be stored:
• in an organized way so wheels can be removed
without disturbing or damaging other wheels
• with their safety information
Grinding and cut-off wheels should NOT be dropped,
rolled or bumped.
Discard wheels that have been dropped, rolled,
bumped, subjected to extreme changes in tempera-
ture, or come into contact with solvents or wetness.
Grinding
When grinding, hold tool at a 5
o
to 15
o
angle, using
constant pressure for a uniform fi nish. Too great an
angle causes concentrated pressure on small areas
which may gouge or burn work surface.
3. Wipe the flange, flange nut and spindle to
remove dust and debris. Inspect the parts for
damage. Replace if needed.
5. Place the selected wheel on the spindle and
align it with the fl ange.
6. Position the fl ange nut over the spindle accord-
ing to wheel thickness (Fig. 4).
7. Press in the spindle lock button while turning the
fl ange nut clockwise. Tighten securely using a
spanner wrench.
8. To
remove
wheel, unplug the tool and reverse
the procedure.
Grinding Wheel Selection
Use grinding wheels, and accessories that are:
• correct size as written on tool’s nameplate.
• rated at or above the RPM listed on the tool’s
nameplate.
• correct accessory, wheel type and grit for the job.
Grinding is the cutting action of thousands of abra-
sive grains on the face of a grinding wheel. When
grinding metals such as steel and iron, choose an
aluminum oxide grinding wheel. Select a silicon
carbide grinding wheel for stone and concrete. Use
cotton reinforced wheels for non-ferrous metals.
Type 27 Reinforced 1/8" thick or less Cut-Off
Wheels are suited for small cut-off and shallow
notching operations only. Always handle wheels
carefully to avoid damage. Before installing any
wheel, always inspect it for cracks. If wheel is
cracked, discard it to prevent others from using it.
Trigger Switch Operation (6122-30, 6122-30A,
6122-31, 6122-31A, 6123-30, 6123-31)
To
start
the tool, grasp the handle and side handle
fi rmly and pull the trigger.
To
stop
the tool, release the trigger. Make sure
the tool comes to a complete stop before laying
the tool down.
To
lock-on
the switch (6122-30, 6122-30A,
6123-30 only), start the tool and push in the lock-on
button. To stop the tool, pull and release the trig-
ger. Make sure the tool comes to a complete stop
before laying it down.
General Operation
1. If you have just installed an accessory or are
beginning a period of work, test it by letting it spin
for one minute before applying it to the workpiece.
Out-of-balance or damaged accessories can mar
workpiece, damage the tool, and cause stress that
may cause accessory failure.
2. Use a clamp, vise or other practical means to hold
your work, freeing both hands to control the tool.
3.Hold tool securely with both hands.
4. Start the tool.
5. Allow accessory to come to full speed before
beginning work.
6. Control pressure and surface contact between
accessory and workpiece. Too much pressure
slows speed.
7. When fi nished, turn off the tool and make sure it
comes to a complete stop before laying it down.
Flange nut
position for
1/4" thick or more wheels
Fig. 6
WARNING
A Type "1" guard must be
installed when using a cut-off wheel to provide
maximum protection for the operator if the
wheel should break.
WARNING
Using the face of a Cut-Off
Wheel (as in grinding) will cause the Wheel
to crack and break, resulting in serious per-
sonal injury.
USING CUT-OFF WHEELS
Type "1" Cut-Off Wheels are suited for small cut-off
and shallow notching operations only.
When using a cut-off wheel, hold the tool as shown,
using only the edge of the wheel.
4. Place the fl ange on spindle, as shown.
