Bosch 1132VSR Instrucciones De Funcionamiento Y Seguridad página 8

BM 3609929358 9-03 9/25/03
First, clamp the pieces together and drill the
first hole 2/3 the diameter of the screw. If the
material is soft, drill only 2/3 the proper
length. If it is hard, drill the entire length.
FASTENING
WITH SCREWS
1. Drill 2/3 diameter
and 2/3 of screw
length for soft
materials, full
length for hard
materials
Screw
Apply a slight
even pressure
when driving
screws
FIG. 2
Second, unclamp the pieces and drill the
second hole the same diameter as the screw
shank in the first or top piece of wood.
Third, if flat head screw is used, countersink
the hole to make the screw flush with the
surface. Then, simply apply even pressure
when driving the screw. The screw shank
clearance hole in the first piece allows the
screw head to pull the pieces tightly
together.
The adjustable screw drill accessory will do
all of these operations quickly and easily.
Screw drills are available for screw sizes No.
6, 8, 10 and 12.
DRILL BITS
Always inspect drill bits for excessive wear.
Use only bits that are sharp and in good
condition.
TWIST BITS: Available with straight and
reduced shanks for wood and light duty metal
drilling. High speed bits cut faster and last
longer on hard materials.
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
2:42 PM Page 8
Operating Tips — cont.
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
2. Drill same diameter
out frequently to clear chips from flutes.
as screw shank
Use a "back-up" block of wood for work that is
3. Countersink likely to splinter, such as thin materials.
same diameter
as screw head
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
Adjustable
back side.
Screw
Drill
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.
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.
WARNING
!
safe operating speed is not exceeded by the
nameplate speed of the tool. Do not exceed
the recommended wheel diameter.
Work with brushes requires high speeds. Use
of the "Lock-ON" button feature will provide a
much easier operation.
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 wires
will be overstressed, resulting in a wiping
-8-
DRILLING METAL
DRILLING MASONRY
Before using an accessory,
be certain that its maximum
WIRE BRUSHES