SLIP CLUTCHtrigger. During operation, hold the drill firmly
The tool has a internal pre-set slip clutch.and exert moderate, steady pressure. Too
The output spindle will stop rotating if themuch pressure at low speed will stall the
accessory binds and overloads the tool.hammer. Too little pressure will keep the bit
from cutting and cause excess friction by
AUXILIARY HANDLEsliding over the surface. This can be
The tool must be supported with the auxiliarydamaging to the drill and bit.
handle, which can be swiveled 360u. To
reposition and/or swivel the handle, loosenShanks of all drill bits should be wiped clean
the hand grip, move the handle to theprior to using and immediately after removing.
desired position along the barrel andRECALL THESE INSTRUCTIONS FOR
securely retighten the hand grip.SAFE OPERATION:
DEPTH GAUGE1. Some materials require slow drilling
Your drilling depth can be pre-set and/orspeeds; whereas, others require higher speed
repeated by using the depth gauge.to produce the best results.
Setting depth: After the auxiliary handle is2. All work must be supported or secured
installed, make sure the accessory has beenbefore drilling and steady, even pressure
fully inserted into the tool holder beforeapplied in line with the drill bit.
Fig. 13. As the drill bit cuts through the opposite
To adjust depth, push the depth gaugeside, reduce the pressure and continue
release button, slide the depth gauge torunning the drill as the bit is withdrawn.
desired depth and release pressure onMaterials such as glass, porcelain, ceramics,
button to lock the depth gauge in place.tiles, plastics, etc., should be drilled at low
TOOL TIPSspeeds with specially designed drill bits and
Following a few simple tips will reduce wearlubricants.
on the tool and the chance of injury to theDRILLING WOOD OR PLASTIC
operator.If backing block is not used, ease up on the
The high efficiency available from thepressure just before the bit breaks through
BOSCH Rotary Hammer can only bethe wood to avoid splintering. Complete the
obtained if sharp and undamaged drillinghole from the opposite side immediately after
tools are used. Note that the costs forthe point breaks through. If bit binds, reverse
maintaining sharp drilling tools are more thanthe drilling operation to help remove the bit
offset by the time lost in operating dull drillingfrom the work.
tools.DRILLING METAL
All grease packed hammers require a shortMake a center punch in the material for
time to warm up. Depending on theeasier starting. Use enough pressure to keep
temperature, this time will vary fromthe bit cutting. If the bit is allowed to merely
approximately 15 seconds (90! F) to 2spin in the hole, it will become dull within a
minutes (32! F). The tool will exert its fullshort time. When drilling a larger hole, it is
power and hammering action after the heatfaster and easier on your power pack to first
from impact hammering has spread,make a smaller hole and enlarge it to the
softening the grease.required size. Lubricate the tip of the bit
occasionally with CUTTING OIL for easier
CARBIDE TIPPED BITSmetal drilling. If bit binds, reverse the drilling
Used for drilling stone, concrete, cement,to help remove the bit from the work.
brick, cinder block and other unusually hard
non-metals. The Rotary Hammer is designedDRILLING MASONRY
for OSDS� Carbide Tipped Bits up to 3/4 inchUse carbide-tipped SDS-plus¨ bit for cinder
diameter.block, mortar, common brick, soft stone and
3 JAW CHUCKother materials. The amount of pressure to
The 3 Jaw Chuck can convert your tool forbe used is dependent upon the type of
use with straight shank bits. material being drilled. Soft materials require
less pressure while the hard materials need
You will extend the life of your bits and domore pressure to prevent the drill bit from
neater work if you always put the bit in contactspinning.
with the workpiece BEFORE pulling the
-9- |
ACEC
BOSCH
