Drilling Wood; Drilling Metal; Drilling Masonry - Bosch GSR18V-800C Operating/Safety Instructions Manual

CARBIDE TIPPED BITS: Used for drilling stone,
concrete, plaster, cement and other unusually
hard nonmetals. Use continuous heavy feed
pressure when employing carbide tip bits.

Drilling Wood

Be certain workpiece is clamped or anchored
firmly. Always apply pressure in a straight line
with the drill bit. Maintain enough pressure to
keep the drill "biting".
When drilling holes in wood, twist bits can be
used. Twist bits may overheat unless pulled out
frequently to clear chips from flutes.
Use a "back-up" block of wood for work that is
likely to splinter, such as thin materials.
You will drill a cleaner hole if you ease up on
the pressure just before the bit breaks through
the wood. Then complete the hole from the back
side.

Drilling Metal

There are two rules for drilling hard materials.
First, the harder the material, the greater the
pressure you need to apply to the tool. 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 smaller hole
first, then enlarge to the required size, it's 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 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 masonry work.
Best performance drilling in masonry is achieved
when in drill and hammer mode (GSB18V-800C
model only).
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Operating Tips
Sanding and Polishing
Fine sanding and polishing require "touch". Se-
lect the most efficient speed.
When using polishing bonnets, always be sure
the excess string that secures the bonnet is
tucked well within the bonnet during operation.
Wire Brushes
Work with brushes requires high speeds.
Brushing Pressure
1. Let the tips of a wire brush do the work. Op-
erate 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 wires will
be overstressed, resulting in a wiping action;
and if this is continued, the life of the brush
will be shortened due to wire fatigue.
3. Apply the brush to the work in such a way that
as much of the brush face as possible is in full
contact with the work. Applying the side or
edge of the brush to the work will result in
wire breakage and shortened brush life.
INCORRECT: Excessive pressure can cause wire breakage.
CORRECT: Wire tips doing the work.
8/3/23 11:06 AM