8 - English
TWO-SPEED GEAR TRAIN
See Figures 7 and 8, page 12.
Select
low speed
(1)
for applications such as drilling in
metal, and for applications requiring higher torque, such
as driving large screws.
Select high speed
(2)
for fast drilling or driving applica-
tions, for drilling in wood or masonry, and for hammer
drilling.
NOTICE:
Never change speeds while the tool is running.
Failure to obey this caution could result in serious
damage to the hammer drill.
NOTE:
If you have difficulty changing from one speed range
to the other, turn the chuck by hand until the gears engage.
ADJUSTING TORQUE/DRIVING SCREWS
See Figures 9 and 10, page 12.
When using the hammer drill for various driving applica-
tions, increasing or decreasing the torque helps prevent the
possibility of damaging screw heads, threads, workpiece,
etc. In general, torque intensity should correspond to the
screw diameter. If the torque is too high or the screws too
small, the screws may be damaged or broken. The torque
is adjusted by rotating the torque adjustment ring.
The torque is greater when the torque adjustment ring is
set on a higher setting. The torque is less when the torque
adjustment ring is set on a lower setting.
Rotate the adjustment ring to the proper torque setting for
the type of material and size of screw you are using.
• 1 - 4
For driving small screws
• 5 - 8
For driving screws into soft material
• 9 - 12
For driving screws into soft and hard
materials
• 13 - 16 driving screws into hard wood
• 17 - 22 For driving large screws
•
For drilling
•
For drilling into masonry and concrete.
WARNING:
Do not drive a screw where there is likely to be
hidden wiring behind the surface. Contact with a
“live” wire will make exposed metal parts of the
tool “live” and possibly shock the operator. If you
must drive a screw where hidden wire may be
present, always hold tool by insulated gripping
surfaces (handle) when performing the operation
to prevent a shock to the operator.
Depress the switch trigger to start the hammer drill.
Move the bit into the workpiece, applying only enough
pressure to keep the bit cutting or driving the screw. Do
not force the drill or apply side pressure to elongate a
hole. Let the tool do the work.
WARNING:
When drilling, be prepared for binding at bit break-
through. When these situations occur, drill has a
tendency to grab and kick opposite to the direc-
tion of rotation and could cause loss of control
when breaking through material. If not prepared,
this loss of control can result in possible serious
injury.
When drilling hard, smooth surfaces, use a center punch
to mark the desired hole location. This will prevent the
bit from slipping off-center as the hole is started.
If the bit jams in the workpiece or if the hammer drill
stalls, stop the tool immediately. Remove the bit from
the workpiece and determine the reason for jamming.
NOTE:
This hammer drill has an electric brake. When the
switch trigger is released, the chuck stops turning.
NOTE:
If operation creates considerable dust, frequent
vacuuming of the work area is recommended.
OPERATION
