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NOTE
:
• Use the proper
bit for the head of the screw that you wish to use.
• Make sure that
the driver
bit
is inserted
straight
in the screw
head, or the screw and/or
bit may be damaged.
• When
driving
wood
screws, predrill
pilot
holes
to make
driving
easier
and to pre-
vent
splitting
of the workpiece.
See the
chart.
Nominal diameter of
Recommended size
wood screw (mm)
of pilot hole (mm)
2.0 -- 2.2
3.1 (1t8")
{5/64" -- 3/32")
2.2 -- 2.5
3.5 (9/64")
(3/32" -- 3t32"')
2.5 -- 2.8
3.8 (5/32")
(3/32" -- 7t64 °')
2.9 -- 3.2
4,5 (11/64")
(7164"' - 1t8"}
3.1 -- 3.4
4.8 (3/16")
(1/8"
- 9164"}
3.3 -- 3.6
5.! (13/64")
{1/8" - 9/64")
3.6 - 3.9
5.5 (7/32")
(9/64" -- 5/32")
Drilling operation
• Drilling in wood
When drilling in wood, best results are obtained with wood drills equipped with a guide
screw. The guide screw makes drilling easier by pulling the bit into the workpiece.
• Drilling
in metal
To
prevent
the
bit
from
slipping
when
starting
a hole,
make
an indentation
with
a
centerpunch
and hammer
at the
point
to be drilled.
Place the point
of the bit
in the
indentation
and start drilling.
Use a cutting
lubricant
when
drilling
metals.
The exceptions
are iron and brass which
should
be drilled
dry,
CAUTION
:
• Pressing excessively
on the tool will not speed up the drilling.
In fact, this excessive pres-
sure
will
only
serve to damage
the tip
of your
bit, decrease
the tool
performance
and
shorten
the service
life of the tool.
• There
is a tremendous
force
exerted
on the tool/bit
at the time
of hole
breakthrough.
Hold
the tool
firmly
and exert
care when the bit begins
to break
through
the workpiece.
• A stuck
bit can be removed
simply by setting
the reversing
switch
to reverse rotation
in
order to back out. However,
the tool
may back out abruptly
if you do not hold it firmly.
• Always
secure small
workpieces
in a vise or similar
hold-down
device.
L0
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