Drilling Operation - Makita 6093D Instruction Manual

NOTE :
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Use the proper bit for the head of the screw that you wish to use.
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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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When driving wood screws, predrill Pilot
Nominal diameter of
I
Recommended size
holes to make driving easier and to pre-
vent splitting
of
t h e workpiece. See t h e
chart.
wood screw
(mm)
3.1 (1/8")
3.5 (9/64")
3.8 (5/32")
4.5 ( 1 1 /64")
4.8 (3/16')
of
pilot hole
(mm)
2.0
-
2.2
(5/64"
-
3/32")
2.2
-
2.5
(3/32"
-
3/32")
2.5
-
2.8
(3/32"
-
7/64")
2.9
-
3.2
(7/64"
-
118")
3.1
-
3.4
(118''
-
9/64')
3.6
-
3.9
(9/64"
-
5/32")
5.5 (7/32")
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.
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Drilling in metal
To prevent the bit from slipping when starting a hole, make an indentation with a
centerpunch and hammer a t the 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 :
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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 a t t h e time of hole breakthrough.
Hold t h e
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 o u t abruptly if you d o not hold it firmly.
*Always secure small workpieces in a vise or similar hold-down device.
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