Use a Oback-up� block of wood for work that ismuch easier operation.
likely to splinter, such as thin materials.BRUSHING PRESSURE
You will drill a cleaner hole if you ease up on1. Remember, the tips of a wire brush do the
the pressure just before the bit breaks throughwork. Operate the brush with the lightest
the wood. Then complete the hole from thepressure so only the tips of the wire come in
back side.contact with the work.
DRILLING METAL2. If heavier pressures are used, the wires
There are two rules for drilling hard materials.will be overstressed, resulting in a wiping
First, the harder the material, the greater theaction; and if this is continued, the life of the
pressure you need to apply to the tool.brush will be shortened due to wire fatigue.
Second, the harder the material, the slower the
3. Apply the brush to the work in such a way
speed. Here are a couple of tips for drilling inthat as much of the brush face as possible is
metal. Lubricate the tip of the bit occasionally
with cutting oil except when drilling soft metalsin full contact with the work. Applying the
side or edge of the brush to the work will
such as aluminum, copper or cast iron. If theresult in wire breakage and shortened brush
hole to be drilled is fairly large, drill a smaller
life.
hole first, then enlarge to the required size, itOs
often faster in the long run. Maintain enoughCORRECT: Wire tips doing the work.
pressure to assure that the bit does not just
spin in the hole. This will dull the bit and greatly
shorten its life.
15°
DRILLING MASONRY
Soft materials such as brick are relatively easy
to drill. Concrete however, will require much
more pressure to keep the bit from spinning.
Be sure to use carbide tip bits for all masonryINCORRECT: Excessive pressure can cause wire breakage.
work.
Before using an accessory,
!WARNING
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
You will find the OLock-ON� button feature aRUNNING NUTS AND BOLTS
Variable speed control must be used with
convenience for the continuous operation
required for rough sanding. Fine sanding andcaution for driving nuts and bolts with socket
set attachments. The technique is to start
polishing require Otouch�. Select the most
efficient speed.slowly, increasing speed as the nut or bolt runs
down. Set the nut or bolt snugly by slowing the
When using polishing bonnets, alway be suredrill to a stop. If this procedure is not followed,
the excess string that secures the bonnet isthe tool will have a tendency to torque or twist
tucked well within the bonnet during operation.in your hands when the nut or bolt seats.
WIRE BRUSHES
Work with brushes requires high speeds. Use
of the OLock-ON� button feature will provide a
-9- |
ACEC
BOSCH
