Prior To Operation - DeWalt DWE4120FN Instruction Manual

English
4. While depressing the spindle lock button, tighten the
locking flange 7 by hand or using the wrench supplied.
(Only use a locking flange if it is in perfect condition.)
Refer to Accessories Chart to see flange details.
5. To remove the wheel, depress the spindle lock button
and loosen the locking flange with a wrench.
Up to 1/8" (3.0 mm)
thick wheels
Locking Flange
Backing Flange
nOTE: If the wheel spins after the locking flange is
tightened, check the orientation of the locking flange. If a
thin wheel is installed with the pilot on the locking flange
toward the wheel, it will spin because the height of the pilot
prevents the locking flange from holding the wheel.
Fig. E
Mounting Sanding Backing Pads
(Fig. A, F)
nOTE: Use of a guard with sanding discs that use backing
pads, often called fiber resin discs, is not required. Since a
guard is not required for these accessories, the guard may or
may not fit correctly if used.

WARNING: Failure to properly seat the clamp nut
and/or pad could result in serious injury (or damage
to the tool or wheel).

WARNING: Proper guard must be reinstalled for
grinding wheel, cutting wheel and sanding flap disc,
applications after sanding applications are complete.
1. Place or appropriately thread backing pad
the spindle.
2. Place the sanding disc
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3. While depressing spindle lock button
sanding clamp nut 17 on spindle, piloting the raised
hub on the clamp nut into the center of san ding disc
and backing pad.
4. Tighten the clamp nut by hand. Then depress the
spindle lock button while turning the sanding disc until
the sanding disc and clamp nut are snug.
8
Wheels thicker than
1/8" (3.0 mm)
Locking Flange
Backing Flange
7
14
6
4
15 on
on the backing pad .
15
, thread the
3
5. To remove the wheel, grasp and turn the backing
pad and sanding pad while depressing the spindle
lock button.
Fig. F

Prior to Operation

• Install the guard and appropriate disc or wheel. Do not
use excessively worn discs or wheels.
• Be sure the backing flange and locking flange are
mounted correctly. Follow the instructions given in the
Accessories Chart.
• Make sure the disc or wheel rotates in the direction of
the arrows on the accessory and the tool.
• Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for chips
and cracks, backing pad for cracks, and tear or excess
wear. If power tool or accessory is dropped, inspect
for damage or install an undamaged accessory. After
inspecting and installing an accessory, position yourself
and bystanders away from the plane of the rotating
accessory and run the power tool at maximum no-load
speed for one minute. Damaged accessories will
normally break apart during this test time.
OPERATION

WARNING: To reduce the risk of serious personal
injury, turn unit off and disconnect it from
power source before making any adjustments or
removing/installing attachments or accessories.
An accidental start-up can cause injury.
Proper Hand Position (Fig. G)

WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown.

WARNING: To reduce the risk of serious personal
injury, ALWAYS hold securely in anticipation of a
sudden reaction.
Proper hand position requires one hand on the side
handle 5 , with the other hand on the body of the tool, as
shown in Figure G.
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16
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