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Operation
1) Hammering drilling operation
When drilling in concrete, granite, tile, etc., press the button on the
lop
mark side fully.
Be sure to use a tungstencarbide tipped bit. Do not apply more pressure when the
hole becomes clogged with chips or particles. Instead, run the tool at an idle, then
remove the bit partially from the hole. By repeating this several times, the hole will be
cleaned out.
After drilling the hole, use the blow-out
bulb to clean the dust out of the hole.
2) Drilling operation
When drilling in wood, metal or plastic materials, press the button on the
L -
mark
side fully.
*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 work-
piece.
To prevent the bit from slipping when starting a hole, make an indentation with a
centerpunch and hammer
at
the point to be drilled. Place the point of the bit in the
indentation and start drilling. Use a cutting lubricant when drilling metals. The excep
tions are iron and brass which should be drilled dry.
*Drilling in metal
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 twisting force exerted on the tool/bit at the time of hole break-
through. Hold the tool firmly and exert care when the bit begins to break through the
workpiece. Use both hands to help control the tool. Be sure to use the side grip to main-
tain proper control.
*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.
*Always secure small workpieces in a vise
or
similar hold-down device.
8
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