DeWalt DWE4120 Guide D'utilisation page 8

English

WARNING: Handle and store all abrasive wheels
carefully to prevent damage from thermal shock, heat,
mechanical damage, etc. Store in a dry protected area
free from high humidity, freezing temperatures or extreme
temperature changes.
Mounting Guard

CAUTION: Guards must be used with all grinding
wheels, cutting wheels, sanding flap discs, wire brushes,
and wire wheels. The tool may be used without a guard only
when sanding with conventional sanding discs. A Type 27
guard (intended for use with depressed center grinding wheels
[Type 27 and Type 29], sanding flap discs, wire wheels and
wire cup brushes) is available at extra cost from your local
dealer or authorized service center. Grinding and cutting with
wheels other than Type 27 and 29 require different accessory
guards not included with tool. A Type 1 guard is provided
for use with the Type 1 wheel. Mounting instructions for
accessory guards are shown below and are also included in
the accessory package.
Mounting and Removing (Type 27)
One-touch™ Guard (Fig. D, E)
nOTE: If your grinder is supplied with a keyless
ONE TOUCH™ guard, ensure the screw, lever and spring are
fitted correctly before mounting the guard.
1. Press and hold the guard release lever
2. Align the lugs on the guard with the slots
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gear case.
3. Push the guard down until the guard lugs engage and
rotate them in the groove on the gear case hub. Release the
guard release lever.
4. With the spindle facing the operator, rotate the guard
clockwise into the desired working position. The guard body
should be positioned between the spindle and the operator
to provide maximum operator protection.
5. For easy adjustment, the guard can be rotated in the
clockwise direction. nOTE: The guard release lever should
snap into one of the alignment holes
collar. This insures that the guard is secure. The guard can
be repositioned in the opposite direction by depressing the
guard release lever.
6. To remove the guard, follow steps 1–3 of these
instructions in reverse.
nOTE: Edge grinding and cutting can be performed with
Type 27 wheels designed and specified for this purpose;
1/4" (6.35 mm) thick wheels are designed for surface
grinding while 1/8" (3.17 mm) wheels are designed for edge
grinding. Cutting can also be performed by using a Type 1
wheel and a Type 1 guard.
nOTE: Refer to the Accessories Chart to select the proper
guard/accessory combination.
OPERATION

WARNING: To reduce the risk of injury, turn unit off
and disconnect it from power source before installing
and removing accessories, before adjusting or when
making repairs. An accidental start‑up can cause injury.
Guards and Flanges
It is important to choose the correct guards and flanges to
use with the grinder accessories. Refer to the Accessories
Chart for the correct accessories.
nOTE: Edge grinding and cutting can be performed with
Type 27 wheels designed and specified for this purpose.
8
11 .
on the
13
on the guard
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WARNING: Accessories must be rated for at least the
speed recom mended on the tool warning label. Wheels and
other accessories running over rated accessory speed may
burst and cause injury. Every unthreaded accessory must have
a 7/8" arbor hole. If it does not, it may have been designed
for a circular saw and should not be used. Use only the
accessories shown in the Accessories Chart of this manual.
Accessory ratings must be above listed minimum wheel speed
as shown on tool nameplate.
Switches

CAUTION: 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.
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.
Paddle Switch (DWE4120, DWE4120N) (Fig. F)

CAUTION: Before connecting the tool to a power source
depress and release the paddle switch
the switch is off. Depress and release the paddle switch 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.
To turn the tool on, push the lock-off lever
back of the tool, then depress the paddle switch
will run while the switch is depressed. Turn the tool off by
releasing the paddle switch.

WARNING: Do not disable the lock‑off lever. If the lock‑off
lever is disabled, the tool may start unexpectedly when it is
laid down.
Slider Switch (Fig. G)

WARNING: Before connecting the tool to a power supply,
be sure the slider switch is in the off position by pressing the
rear part of the switch and releasing. Ensure the slider 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 slider switch is locked on
when the power is connected, the tool will start unexpectedly.
To start the tool, slide the ON/OFF slider switch
the front of the tool. To stop the tool, release the ON/OFF
slider switch.
For continuous operation, slide the switch toward the front
of the tool and press the forward part of the switch inward.
To stop the tool while operating in continuous mode, press
the rear part of the slider switch and release.
Lock-On Button (DWE4120) (Fig. H)
The lock-on button 9 offers increased comfort in extended
use applications. To lock the tool on, push the lock-off
lever toward the back of the tool then depress the
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paddle switch 8 . With the tool running, depress the lock-on
button 9 . The tool will continue to run after the paddle
switch is released. To unlock the tool, depress and release
the paddle switch. This will cause the tool to stop.

CAUTION: 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.
8 to ensure that
toward the
10
8 . The tool
7 toward