BM 1619929654 10-04 10/4/04 9:32 AM Page 9
TOOL TIPSYou will extend the life of your bits and do
Following a few simple tips will reduce wearneater work if you always put the bit in contact
on the tool and the chance of injury to thewith the workpiece BEFORE pulling the
operator.trigger. During operation, hold the drill firmly
NOTE: The high efficiency available fromand exert moderate, steady pressure. Too
much pressure at low speed will stall the
the rotary hammers can only be obtained if
sharp and undamaged accessories are used.hammer. Too little pressure will keep the bit
from cutting and cause excess friction by
The Ocost� to maintain sharp and undamaged
accessories is more than offset by the Otimesliding over the surface. This can be
damaging to the drill and bit.
saved� in operating the tool with sharp
accessories.Shanks of all drill bits should be wiped clean
All hammers require a short period of time toprior to using and immediately after removing.
warm up. Depending on the roomRecall these instructions for safe operation:
temperature, this time may vary from1. Some materials require slow drilling
90uFspeeds; whereas, others require higher speed
32uFto produce the best results.
break-in period before full performance is2. All work must be supported or secured
realized. This period may require up to 5before drilling and steady, even pressure
hours of operation.
applied in line with the drill bit.
Carbide tipped bits: Used for drilling stone,
3. As the drill bit cuts through the opposite
concrete, cement, brick, cinder block andside, reduce the pressure and continue
other unusually hard non-metals. The Rotary
running the drill as the bit is withdrawn.
Hammer is designed for OSDS� Carbide
Tipped Bits up to 3/4 inch diameter.Materials such as glass, porcelain, ceramics,
tiles, plastics, etc., should be drilled at low
3 JAW CHUCKspeeds with specially designed drill bits and
The 3 Jaw Chuck with SDS Shank Adaptorlubricants.
accessory can convert your tool for use with
straight shank bits.
DRILLING WOOD OR PLASTICsoft metals such as aluminum, copper or cast
If backing block is not used, ease up on theiron. If the hole to be drilled is fairly large, drill a
pressure just before the bit breaks throughsmaller hole first, then enlarge to the required
the wood to avoid splintering. Complete thesize, itOs often faster in the long run. Maintain
hole from the opposite side immediately afterenough pressure to assure that the bit does not
the point breaks through. If bit binds, reversejust spin in the hole. This will dull the bit and
the drilling operation to help remove the bitgreatly shorten its life.
from the work.
DRILLING MASONRY
DRILLING METAL
There are two rules for drilling hard materials.Use carbide-tipped masonry bit for cinder
block, mortar, common brick, soft stone and
First, the harder the material, the greater the
pressure you need to apply to the tool. Second,other materials. The amount of pressure to
be used is dependent upon the type of
the harder the material, the slower the speed.
Here are a couple of tips for drilling in metal.material being drilled. Soft materials require
less pressure while the hard materials need
Make a center punch in the material for
easier starting. Lubricate the tip of the bitmore pressure to prevent the drill bit from
spinning.
occasionally with cutting oil except when drilling
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ACEC
BOSCH
