Nitto Kohki LO-3550, Instruction Manual

Page: 17 / 26

16
(7-2) Final stage of drilling
CAUTION
When drilling a hole in an angle, channel or
H-section irons, etc., cutter may be damaged
when it comes to the slanted part of the work
piece on the
fi nal cutting stage. Feed slowly in its
start and fi nish cutting. (Fig. 28)
Slanted surface
R
Fig. 28
(7-3) Drilling on the wall
When drilling on the wall, position the cutter at the
lower side and the magnet on the upper side.
(Fig. 29)
Fig. 29
(8) Finish drilling the hole
WARNING
Beware of ejecting slug when fi nish with the hole.
Never touch the slug with bare hands since it is
hot and sharp.
After complete drilling, turn the Feed Handle to
uplift the cutter and press the stop switch.
When the drill motor stops, immediately turn off
the power switch. Continuous current
fl ow through
the magnet, while it is ON, could shorten the
service life of the magnet.
(9) About Remaining Magnet Power
There are some cases that you cannot lift up the
magnet because of remaining magnet power even
after turning off the switch. The thicker the work
piece plate or the finer the surface finish of the
plate, more often you will face the case. Follow the
following instructions.
Hold the unit at the upper part of the body and the
grip then pull down them towards you.
Upp er p art o f t h e bo d y
G r ip
P ull t ow ards yo u
Fig. 30
(10) Removing Slug
CAUTION
Do not start the next drilling with a slug remaining
on the cutter.
The tool has automatic slug discharge system.
But when the slug would not come out by turning
the feed handle to lift up the cutter, do not try
to turn the handle forcefully. This will result in
machine troubles.
Upon drilling complete, slug will be ejected
automatically pushed out by the spring-operated
pilot pin.
Should the slug left choked inside the cutter, turn
the handle to lift up the cutter to eject the slug
forcefully. When even turning the handle with
the same force as in the feed for cutting a hole,
you cannot eject the slug, do not turn the handle
forcefully any more. Remove the slug from inside
the cutter by tapping the collar of the slug with a
needle stick or alike. (Fig. 31)
Pi l o t Pi n
C utter
Slu g Thi n p unc h
Co llar
Slu g
Fig. 31