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ENglish
as brick, cement, cinder block, etc., use carbide-tipped
bits rated for percussion drilling.
•
Be sure the material to be drilled is anchored or clamped
firmly. If drilling thin material, use a wood "back-up"
block to prevent damage to the material.
•
Always apply pressure in a straight line with the bit. Use
enough pressure to keep drill biting, but do not push
hard enough to stall the motor or deflect the bit.
•
Hold tool firmly to control the twisting action of the drill.
WARNING: Drill may stall if overloaded causing a
sudden twist. Always expect the stall. Grip the drill
firmly with both hands to control the twisting action
and avoid injury.
•
IF DRILL STALLS, it is usually because it is being
overloaded or improperly used. RELEASE TRIGGER
IMMEDIATELY, remove drill bit from work, and
determine cause of stalling. DO NOT CLICK TRIGGER ON
AND OFF IN AN AT TEMPT TO START A STALLED DRILL
— THIS CAN DAMAGE THE DRILL.
•
To minimize stalling or breaking through the material,
reduce pressure on drill and ease the bit through the
last fractional part of the hole.
•
Keep the motor running when pulling the bit back out
of a drilled hole. This will help prevent jamming.
•
With variable speed drills there is no need to center
punch the point to be drilled. Use a slow speed to start
the hole and accelerate by squeezing the trigger harder
when the hole is deep enough to drill without the bit
skipping out.
Drilling in Metal
Start drilling with slow speed and increase to full power
while applying firm pressure on the tool. A smooth even
flow of metal chips indicates the proper drilling rate. Use a
cutting lubricant when drilling metals. The exceptions are
cast iron and brass which should be drilled dry.
NoTE: Large [5/16" to 1/2" (7.6 mm to 13 mm)] holes
in steel can be made easier if a pilot hole [5/32" to 3/16"
(3.8 mm to 5 mm] is drilled first.
Drilling in Wood
Start drilling with slow speed and increase to full power
while applying firm pressure on the tool. Holes in wood can
be made with the same twist drills used for metal. These
bits may overheat unless pulled out frequently to clear chips
from the flutes. For larger holes, use spade bits, power auger
bits, or hole saws. Work that is apt to splinter should be
backed up with a block of wood.
Drilling in Masonry
When drilling in masonry, use carbide tipped bits rated
for percussion drilling and be certain that the bit is sharp.
Use a constant and firm force on the tool to drill most
effectively. A smooth, even flow of dust indicates the proper
drilling rate.
24
Hammerdrill Operation
•
When drilling, use just enough force on the hammer
to keep it from bouncing excessively or "rising" off the
bit. Too much force will cause slower drilling speeds,
overheating, and a lower drilling rate.
•
Drill straight, keeping the bit at a right angle to the
work. Do not exert side pressure on the bit when drilling
as this will cause clogging of the bit flutes and a slower
drilling speed.
•
When drilling deep holes, if the hammer speed starts
to drop off, pull the bit partially out of the hole with the
tool still running to help clear debris from the hole.
•
For masonry, use carbide-tipped bits or masonry
bits. A smooth even flow of dust indicates the proper
drilling rate.
Chipping and Chiselling (Fig. A)
1. Set the mode selector switch
only position.
2. Insert the appropriate chisel and rotate it by hand to
lock it.
3. Adjust the side handle
3
4. Ensure chisel is in contact with work surface before
depressing the trigger switch.
5. Always fully release the trigger switch when work is
finished and before unplugging.
MAINTENANCE
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.
Your D
WALT power tool has been designed to operate
e
over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper
tool care and regular cleaning.
Lubrication
Your power tool requires no additional lubrication.
Cleaning
WARNING: Blow dirt and dust out of all air vents with
clean, dry air at least once a week. To minimize the
risk of eye injury, always wear approved eye protection
when performing this procedure.
WARNING: Never use solvents or other harsh
chemicals for cleaning the non-metallic parts of
the tool. These chemicals may weaken the plastic
materials used in these parts. Use a cloth dampened
only with water and mild soap. Never let any liquid
get inside the tool; never immerse any part of the tool
into a liquid.
7
to the hammering
as required.
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