Environmental Safety - DeWalt DWE490 Instruction Manual

ENglIsh
Fig. I
The lock­on button and be engaged to lock the trigger
2
in the depressed position providing increased comfort in
extended use applications. To unlock the trigger and turn
the tool off, depress and release trigger.
NoTE: Allow the tool to reach full speed before touching
tool to work surface. Lift the tool from the work surface
before turning the tool off.

CAUTION: Make sure the wheel has come to a
complete stop before setting the tool down.
Surface Grinding, Sanding and Wire
Brushing

CAUTION: Always use the correct guard per the
instructions in this manual.

WARNING: Metal dust build-up. Extensive use
of flap discs in metal applications can result in the
increased potential for electric shock. To reduce
this risk, insert an RCD before use and clean the
ventilation slots daily by blowing dry compressed air
into the ventilation slots inaccordance with the below
maintenance instructions.
To perform work on a 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.
Function
Grinding
Grinding with a Flaring Cup Wheel
Sanding with Flap Disc
Sanding with Backing Pad
Wire Brushing
4. Maintain contact between the edge of the wheel and
the work surface.
36
2
1
Angle
Angle
20˚-30˚
5˚-10˚
5˚-10˚
5˚-15˚
5˚-10˚
- 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. Always use the appropriate
grit sandpaper for your application
NoTE: Allowing the tool to rest on the work surface without
moving will damage the work piece.
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.
NoTE: Only those dust masks suitable for working with
lead paint dust and fumes should be used. Ordinary
painting masks do not offer this protection. See your
local hardware dealer for the proper N.I.O.S.H. approved
mask.
3. NO EATING, DRINKING or SMOKING should be done in
the work area to prevent ingesting contaminated paint
particles. Workers should wash and clean up BEFORE
eating, drinking or smoking. Articles of food, drink, or
smoking should not be left in the work area where dust
would settle on them.

Environmental safety

1. Paint should be removed in such a manner as to
minimize the amount of dust generated.
2. Areas where paint removal is occurring should be sealed
with plastic sheeting of 4 mils thickness.
3. Sanding should be done in a manner to reduce tracking
of paint dust outside the work area.
Cleaning and Disposal
1. All surfaces in the work area should be vacuumed
and thoroughly cleaned daily for the duration of
the sanding project. Vacuum filter bags should be
changed frequently.