Advertisement
Drilling ope rat ion
0
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 center-
punch and hammer a t 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 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 the service life
of
the
tool.
*There is a tremendous force exerted on the tool/bit at the time
of
hole breakthrough.
Hold t h e
tool
firmly and exert care when the bit begins
to
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 o u t abruptly if you d o not hold
it
firmly.
0
Always secure small workpieces in a vise
or
similar hold-down device.
Nominal diameter
of
wood s c r e w ( m m )
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
Advertisement
