BM 2610993468 6-04 6/15/04 3:34 PM Page 8
SLIP CLUTCHhammer. Too little pressure will keep the bit
The tool has a internal pre-set slip clutch.from cutting and cause excess friction by
The output spindle will stop rotating if thesliding over the surface. This can be
accessory binds and overloads the tool.damaging to the drill and bit.
AUXILIARY HANDLEShanks of all drill bits should be wiped clean
The tool must be supported with the auxiliaryprior to using and immediately after removing.
handle, which can be swiveled 360u. ToRECALL THESE INSTRUCTIONS FOR
reposition and/or swivel the handle, loosen
the hand grip, move the handle to theSAFE OPERATION:
1. Some materials require slow drilling
desired position along the barrel andspeeds; whereas, others require higher speed
securely retighten the hand grip.
to produce the best results.
DEPTH GAUGE
Your drilling depth can be pre-set and/or2. All work must be supported or secured
before drilling and steady, even pressure
repeated by using the depth gauge.applied in line with the drill bit.
Setting depth: After the auxiliary handle is
3. As the drill bit cuts through the opposite
installed, slide the depth gauge to desired
depth and securely tighten wing knob.side, reduce the pressure and continue
running the drill as the bit is withdrawn.
TOOL TIPS
Materials such as glass, porcelain, ceramics,
Following a few simple tips will reduce weartiles, plastics, etc., should be drilled at low
on the tool and the chance of injury to thespeeds with specially designed drill bits and
operator.
lubricants.
The high efficiency available from the
BOSCH Rotary Hammer can only beDRILLING WOOD OR PLASTIC
If backing block is not used, ease up on the
obtained if sharp and undamaged drilling
tools are used. Note that the costs forpressure just before the bit breaks through
maintaining sharp drilling tools are more thanthe wood to avoid splintering. Complete the
hole from the opposite side immediately after
offset by the time lost in operating dull drilling
tools.the point breaks through. If bit binds, reverse
the drilling operation to help remove the bit
All grease packed hammers require a shortfrom the work.
time to warm up. Depending on the
temperature, this time will vary fromDRILLING METAL
approximately 15 seconds (90! F) to 2Make a center punch in the material for
minutes (32! F). The tool will exert its fulleasier starting. Use enough pressure to keep
power and hammering action after the heatthe bit cutting. If the bit is allowed to merely
from impact hammering has spread,spin in the hole, it will become dull within a
softening the grease.short time. When drilling a larger hole, it is
faster and easier on your power pack to first
CARBIDE TIPPED BITS
Used for drilling stone, concrete, cement,make a smaller hole and enlarge it to the
required size. Lubricate the tip of the bit
brick, cinder block and other unusually hardoccasionally with CUTTING OIL for easier
non-metals. The Rotary Hammer is designed
for OSDS� Carbide Tipped Bits up to 3/4 inchmetal drilling. If bit binds, reverse the drilling
to help remove the bit from the work.
diameter.
DRILLING MASONRY
3 JAW CHUCKUse carbide-tipped masonry bit for cinder
The 3 Jaw Chuck with SDS Shank Adaptor
accessory can convert your tool for use withblock, mortar, common brick, soft stone and
other materials. The amount of pressure to
straight shank bits. be used is dependent upon the type of
You will extend the life of your bits and domaterial being drilled. Soft materials require
neater work if you always put the bit in contactless pressure while the hard materials need
with the workpiece BEFORE pulling themore pressure to prevent the drill bit from
trigger. During operation, hold the drill firmlyspinning.
and exert moderate, steady pressure. Too
much pressure at low speed will stall the
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ACEC
BOSCH
