Use and Care Manual

7 – English
 Hold the tool firmly and place the bit at the starting point
of the workpiece.
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 tool.
 Move the bit into the workpiece, applying only enough
pressure to keep the bit cutting. Do not force the tool or
apply side pressure to elongate a hole. Let the tool do
the work.
WARNING:
Be prepared for binding at bit breakthrough. When
these situations occur, the tool has a tendency to
grab and kick opposite to the direction 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 tool stalls, stop
the tool immediately. Remove the bit from the workpiece
and determine the reason for jamming.
NOTE: This tool has an electric brake. When the switch trig-
ger is released, the chuck stops turning. When the brake is
functioning properly, sparks will be visible through the vent
slots on the housing. This is normal and is the action of the
brake.
NOTICE:
During extended periods of use, it is possible
that lubrication may leak from the gearbox. This
is a normal occurrence and does not indicate a
problem with the tool. Avoid placing the tool on
an unprotected surface to avoid possible property
damage.
MASONRY DRILLING
See Figure 9, page 12.
For maximum performance, use carbide-tipped masonry
impact bits when drilling holes in brick, tile, concrete, etc.
 Select Rotary Hammer Mode.
 Apply light pressure and medium speed for best results
in brick.
OPERATION
CHUCK ADAPTOR (NOT INCLUDED)
See Figure 7, page 11.
For drilling in metal, wood, and plastic with non-SDS-Plus
drill bits, a chuck adaptor must be used.
NOTE: Use with Rotational Drilling Mode only. Rotary ham-
mer mode will damage the tool’s mechanism when used for
fastening or drilling with non-SDS-Plus bits.
BREAK-IN AND COLD STARTS
A new hammer drill may require up to five hours of operation
for break-in. When stored for long periods or in low tem-
peratures, a warm-up period of a few seconds to a couple
of minutes may be required in hammer mode.
INTERNAL CLUTCH
The hammer drill features an internal clutch that is preset
to allow a sufficient amount of force for most drilling opera-
tions. It may slip when the bit binds in the hole or the tool
is overloaded. Be aware that an instant before the clutch
slips, a torque reaction can occur allowing the hammer drill
body to twist in the opposite direction of the turning bit. The
clutch will automatically reset when the binding force of the
bit is removed.
NOTE: It is normal during the drilling process for the bit to
momentarily stop rotating when the clutch is slipping. Con-
tinued drilling will not damage the tool.
MODE SELECTOR
See Figure 8, page 11.
The mode selector gives the operator four options.
Rotary Hammer Mode
Hammering action plus drill bit rotation.
Use for hammer drilling.
Rotational Drilling Mode
Drill bit rotation only; no hammering
action. Use for drilling and other heavy
duty applications.
Chisel Adjust Mode
Position allows the user to rotate the bit
to the optimum position for chiseling
applications. Switch to Chisel Only
Mode to operate.
Chisel Only Mode
Hammering action only for chipping
concrete, tile, and masonry.
DRILLING/CHISELING
 Check the direction of rotation selector for the correct
setting (forward or reverse).
 Secure the workpiece in a vise or with clamps to keep it
from turning as the bit rotates.