BM 2610925942 6-05 6/9/05 3:24 PM Page 15
When drilling holes in wood, twist bits can beHere are a couple of tips for drilling in metal.
used. Twist bits may overheat unless pulled outLubricate the tip of the bit occasionally with
frequently to clear chips from flutes.cutting oil except when drilling soft metals such
as aluminum, copper or cast iron. If the hole to
Use a Oback-up� block of wood for work that is
be drilled is fairly large, drill a smaller hole first,
likely to splinter, such as thin materials.then enlarge to the required size, itOs often
You will drill a cleaner hole if you ease up onfaster in the long run. Maintain enough
the pressure just before the bit breaks throughpressure to assure that the bit does not just
the wood. Then complete the hole from thespin in the hole. This will dull the bit and greatly
back side.shorten its life.
DRILLING METALDRILLING MASONRY
There are two rules for drilling hard materials.Soft materials such as brick are relatively easy
First, the harder the material, the greater theto drill. Concrete however, will require much
pressure you need to apply to the tool. Second,more pressure to keep the bit from spinning. Be
the harder the material, the slower the speed.sure to use carbide tip bits for all masonry work.
Before using an accessory,
!WARNINGCORRECT: Wire tips doing the work.
be certain that its maximum
safe operating speed is not exceeded by the
nameplate speed of the tool. Do not exceed
the recommended wheel diameter.
SANDING AND POLISHING
Fine sanding and polishing require Otouch�.
Select the most efficient speed.
WIRE BRUSHESINCORRECT: Excessive pressure can cause wire breakage.
Work with brushes requires high speeds.
BRUSHING PRESSURE
1. Remember, the tips of a wire brush do the
work. Operate the brush with the lightest
pressure so only the tips of the wire come in
contact with the work.
2. If heavier pressures are used, the wiresRUNNING NUTS AND BOLTS
will be overstressed, resulting in a wipingVariable speed control must be used with
action; and if this is continued, the life of thecaution for driving nuts and bolts with socket
brush will be shortened due to wire fatigue.set attachments. The technique is to start
3. Apply the brush to the work in such a wayslowly, increasing speed as the nut or bolt runs
down. Set the nut or bolt snugly by slowing the
that as much of the brush face as possible is
in full contact with the work. Applying the sidedrill to a stop. If this procedure is not followed,
the tool will have a tendency to torque or twist
or edge of the brush to the work will result inin your hands when the nut or bolt seats.
wire breakage and shortened brush life.
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ACEC
