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Drilling ope rat ion
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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.
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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.
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.
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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.
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Always secure small workpieces in a vise
or
similar hold-down device.
Nominal diameter
of
wood screw (mm)
Screwdriving operation
Place the point of the driver bit in the screw head and apply pressure
to
the
tool.
Start
the
tool.
Release the switch trigger just as the screw bottoms out. The electric brake will
then stop the
tool
immediately, preventing the screw and/or bit from being damaged.
NOTE
:
*Make sure that the driver bit is inserted straight in the screw head,
or
the screw and/or
Recommended size
of
Dilot hole
1mml
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.
2.0
-
2.2
3.1 (118“l
I
(5/64,,
-
3/32,,)
2.2
-
2.5
13/32”
-
3/32”)
3.5 (9/64”)
2.5
-
2.8
3.8 (5132”)
1
13/32,,
-
7,64,,1
2.9
-
3.2
4.5
(1
1/64”]
I
17/64,,
-
1/8,,1
8