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NOTE
:
0
Use the proper bit for the head
of
the screw that you wish t o use.
0
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
t h e workpiece. See t h e
chart.
2.5
-
2.8
(3/32"
-
7/64")
3.8 (5/32")
2.9
-
3.2
4.5 (11164")
I
(7/64,,
-
1/8,,)
3.1
-
3.4
( 1
18"
-
9/64")
4.8 (3/16')
3.3
-
3.6
5.1 (13/64")
I
(118,, -9,64,,)
Drilling operation
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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.
0
Drilling in metal
To
prevent the bit from slipping when starting a hole, make an indentation with a
centerpunch and hammer a t t h e point
to
be drilled. Place the point of t h e 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
:
0
Pressing excessively o n the tool will n o t speed u p the drilling. In fact, this excessive pres-
sure will only serve
to
damage the tip
of
your bit, decrease the
tool
performance and
shorten t h e service life
of
t h e
tool.
.There is a tremendous force exerted on t h e tool/bit a t the time of hole breakthrough.
Hold t h e
tool
firmly and exert care when the bit begins t o break through the workpiece.
0
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 d o not hold it firmly.
0
Always secure small workpieces in a vise
or
similar hold-down device.
10
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