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Drilling operation
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Drilling in wood
When drilling in wood,
best
results are obrained with wood drills equipped with
a
guide
screw. The guide screw makes drilling easier by pulling the bit into the workpiece.
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Drilling in metal
To
prevent the bit from slipping when starting
a
hole, make an indentation with
a
center-
punch and hammer
at
the point to be drilled. Place the point of the bit in the indenta-
tion and start drilling.
Use
a
cutting lubricant when drilling metals. The exceptions are iron and brass which
should be drilled dry.
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
wood screw
(mm)
3.1 (1/8")
3.5 (9/64')
3.8 (5/32")
CAUTION
:
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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.
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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 breakthrough the workpiece.
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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.
0Always secure small workpieces in
a
vise
or similar hold-down device.
Recommended Size
of
pilot
hole
(mm)
2.0
-
2.2
(5/64"
-
3/32")
2.2
-
2.5
(3/32"
-
3/32")
2.5
-
2.8
(3132''
-
7/64")
Screwdriving operation
Place
the point of the driver bit in the
screw head and apply pressure to
the
tool.
Start the tool.
Release
the trigger just
as
the screw bottoms out. If the trigger
is
not
released, the screw
may
strip out the hole
or the screw and/or bit may be damaged.
NOTE
:
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Make sure that the driver bit
is
inserted straight in the screw head, or the screw and/or
bit may be damaged.
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