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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 b i t from slipping when starting a hole, make an indentation with a center-
punch and hammer a t the point t o 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 t o pre-
vent splitting of the workpiece. See the
chart.
Nominal diameter of
wood screw
( m m )
3.1 (1/8")
3.5 ( 9 / 6 4 ' )
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 i s a tremendous force exerted on the tool/bit a t the time of hole breakthrough.
Hold the tool firmly and exert care when the b i t begins to breakthrough the workpiece.
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A
stuck b i t can be removed simply by setting the reversing switch t o 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 t o
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 i s inserted straight in the screw head, or the screw and/or
b i t may be damaged.
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