DRILL BITSSANDING AND POLISHING
Always inspect drill bits for excessive wear.You will find the OLock-ON� button feature a
Use only bits that are sharp and in goodconvenience for the continuous operation
condition.required for rough sanding. Fine sanding and
polishing require Otouch�. Select the most
TWIST BITS: Available with straight and
reduced shanks for wood and light duty metalefficient speed.
drilling. High speed bits cut faster and lastWhen using polishing bonnets, alway be sure
longer on hard materials.the excess string that secures the bonnet is
CARBIDE TIPPED BITS: Used for drillingtucked well within the bonnet during operation.
stone, concrete, plaster, cement and otherWIRE BRUSHES
unusually hard nonmetals. Use continuousWork with brushes requires high speeds. Use
heavy feed pressure when employing carbideof the OLock-ON� button feature will provide a
tip bits.much easier operation.
DRILLING WOODBRUSHING PRESSURE
Be certain workpiece is clamped or anchored1. Remember, the tips of a wire brush do the
firmly. Always apply pressure in a straight linework. Operate the brush with the lightest
with the drill bit. Maintain enough pressure topressure so only the tips of the wire come in
keep the drill Obiting�.contact with the work.
When drilling holes in wood, twist bits can be2. If heavier pressures are used, the wires
used. Twist bits may overheat unless pulledwill be overstressed, resulting in a wiping
out frequently to clear chips from flutes.action; and if this is continued, the life of the
brush will be shortened due to wire fatigue.
Use a Oback-up� block of wood for work that is
likely to splinter, such as thin materials.3. Apply the brush to the work in such a way
You will drill a cleaner hole if you ease up onthat as much of the brush face as possible is
in full contact with the work. Applying the
the pressure just before the bit breaks through
the wood. Then complete the hole from theside or edge of the brush to the work will
result in wire breakage and shortened brush
back side.
life.
DRILLING METALCORRECT: Wire tips doing the work.
There are two rules for drilling hard materials.
First, the harder the material, the greater the
pressure you need to apply to the tool.
15°
Second, the harder the material, the slower the
speed. Here are a couple of tips for drilling in
metal. Lubricate the tip of the bit occasionally
with cutting oil except when drilling soft metals
such as aluminum, copper or cast iron. If the
hole to be drilled is fairly large, drill a smallerINCORRECT: Excessive pressure can cause wire breakage.
hole first, then enlarge to the required size, itOs
often faster in the long run. Maintain enough
pressure to assure that the bit does not just
spin in the hole. This will dull the bit and greatly
shorten its life.
DRILLING MASONRY
Soft materials such as brick are relatively easyRUNNING NUTS AND BOLTS
to drill. Concrete however, will require muchVariable speed control must be used with
more pressure to keep the bit from spinning.caution for driving nuts and bolts with socket
Be sure to use carbide tip bits for all masonry
set attachments. The technique is to start
work.slowly, increasing speed as the nut or bolt runs
Before using an accessory,down. Set the nut or bolt snugly by slowing the
be certain that its maximum!WARNINGdrill to a stop. If this procedure is not followed,
the tool will have a tendency to torque or twist
safe operating speed is not exceeded by the
nameplate speed of the tool. Do not exceedin your hands when the nut or bolt seats.
the recommended wheel diameter.
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ACEC
