DeWalt DWD112S Original Instructions Manual page 19

DO nOT use under wet conditions or in the presence of
flammable liquids or gases.
These heavy-duty drills are professional power tools.
DO nOT let children come into contact with the tool.
Supervision is required when inexperienced operators use
this tool.
Young children and the infirm. This appliance is not
•
intended for use by young children or infirm persons
without supervision.
• This product is not intended for use by persons (including
children) suffering from diminished physical, sensory or
mental abilities; lack of experience, knowledge or skills
unless they are supervised by a person responsible for their
safety. Children should never be left alone with this product.
OPERATION
Instructions for Use

WARNING: Always observe the safety instructions and
applicable regulations.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect tool from power
source before making any adjustments or removing/
installing attachments or accessories. Be sure the
trigger switch is in the OFF position. An accidental start-up
can cause injury.
Proper Hand Position (Fig. A, C)

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 under the the housing,
with the other hand on the main handle
Switches (Fig. A, B)
To start the drill, depress the trigger switch; to stop the drill,
release the trigger.
A variable speed trigger switch
farther the trigger is depressed, the higher the speed of the drill.
For continuous operation, press and hold the variable speed
switch, move the lock-on button
nOTE: Use lower speeds for starting holes without a
center punch, drilling in metal or plastics, driving screws
or drilling ceramics. Higher speeds are better for drilling
wood and composition boards and using abrasive and
polishing accessories.
The forward/reverse lever 3 is used for withdrawing bits
from tight holes and removing screws. It is located above the
trigger switch. To reverse the motor, release the trigger switch
FIRST and then push the lever to the right. After any reversing
operations, return lever to forward position.
To stop continuous operation, press the switch briefly and
release it. Always switch the tool off when work is finished and
before unplugging.
.
5
1 permits speed control. The
2 up, then release the switch.
Drilling

WARNING: To reduce the risk of personal injury,
ALWAYS ensure workpiece is anchored or clamped firmly.
If drilling thin material, use a wood "back-up" block to
prevent damage to the material.
1. Use sharp drill bits only. For WOOD, use twist drill bits, spade
bits, power auger bits, or hole saws. For METAL, use steel
twist drill bits or hole saws.
2. 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.
3. Hold tool firmly with both hands to control the twisting
action of the drill.
4. 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 aTTEMPT
TO STaRT a STaLLED DRILL. ThIS can DaMaGE
ThE DRILL.
5. To minimize stalling or breaking through the material,
reduce pressure on drill and ease the bit through the last
fractional part of the hole.
6. Keep the motor running when pulling the bit back out of a
drilled hole. This will help prevent jamming.
7. 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 8 mm to 13 mm holes in steel can be made easier
if a pilot hole 4 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. Work that is apt to splinter should be backed up with a
block of wood.
Keyless Chuck (Fig. D–F)
DWD112S, DWD115S
The DWD112S and the DWD115S feature a keyless chuck
for greater convenience. To insert a drill bit or other accessory,
follow the steps listed below.
1. Grasp the rear half of the chuck with one hand and use
your other hand to rotate the front half counterclockwise,
as shown in Figure D. Rotate far enough so that the chuck
opens sufficiently to accept the desired accessory.
EnGLISh
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