Wire Brushing - DeWalt DWE4012 Instruction Manual

Paddle Switch (Fig. A)

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.

CAUTION: Before connecting the tool to a power
source, depress and release the paddle switch once
without depressing the lock‑on lever to ensure that 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. If the paddle switch is
locked on, the tool will start unexpectedly when it
is reconnected.
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.
1. To turn the tool on, push the lock-off lever
back of the tool, then depress the paddle switch
tool will run while the switch is depressed.
2. Turn the tool off by releasing the paddle switch.
Lock‑On Button (Fig. A)
The lock-on button offers increased comfort in extended
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use applications. To lock the tool on, push the lock-off
lever toward the back of the tool then depress the paddle
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switch . With the tool running, depress the
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lock-on button. 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.
Spindle Lock (Fig. A)
The spindle lock button 1
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.
Surface Grinding, Sanding and
Wire Brushing

CAUTION: Always use the correct guard per the
instructions in this manual.
nOTE: If the wheel spins after the clamp nut is tightened,
check the orientation of the threaded clamp nut. If a thin
wheel is installed with the pilot on the clamp nut against the
toward the
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is provided to prevent the spindle
wheel, it will spin because the height of the pilot prevents
the clamp nut from holding the wheel.
To perform work on the surface of a workpiece:
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. Material removal rate is
greatest when the tool operates at high speed.
3. Maintain an appropriate angle between the tool
and work surface. Refer to the chart according to
particular function.
7 . The
4. Maintain contact between the edge of the wheel and the
work surface.
‑ If grinding, sanding with flap discs or wire brushing,
move the tool continuously in a forward and back
motion to avoid creating gouges in the work surface.
‑ If sanding with a backing pad, move the tool
constantly in a straight line to prevent burning and
swirling of work surface.
nOTE: Allowing the tool to rest on the work surface without
moving will damage the workpiece.
5. Remove the tool from work surface before turning tool
off. Allow the tool to stop rotating before laying it down.

CAUTION: Use extra care when working over an
edge, as a sudden sharp movement of grinder may
be experienced.
Precautions To Take When Working on a
Painted Workpiece
1. Sanding or wire brushing of lead-based paint is NOT
RECOMMENDED due to the difficulty of controlling
the contaminated dust. The greatest danger of lead
poisoning is to children and pregnant women.
2. Since it is difficult to identify whether or not a paint
contains lead without a chemical analysis, we
recommend the following precautions when sanding
any paint:
Personal safety
1. No children or pregnant women should enter the work
area where the paint sanding or wire brushing is being
done until all clean-up is completed.
2. A dust mask or respirator should be worn by all persons
entering the work area. The filter should be replaced daily
or whenever the wearer has difficulty breathing.
Function
Grinding
Sanding with Flap Disc
Sanding with Backing Pad

Wire Brushing

English
Angle
Angle
20˚-30˚
5˚-10˚
5˚-15˚
5˚-10˚
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