Global Machinery Company GTX2450K - Manual (Page 12)

12
Drilling wood
• For maximum performance, use high speed steel bits for
wood drilling.
• Ensure that the mode selector is in normal drilling mode.
• Begin drilling at a very low speed to prevent the bit from
slipping off the starting point. Increase the speed as the
drill bites into the material.
• When drilling through holes, place a block of wood
behind the work piece to prevent ragged or splintered
edges on the back side of the hole.
• Warning. Never attempt to lock the trigger switch in the
on position, do not lock the trigger on jobs where your
hammer drill may need to be stopped suddenly.
All drilling operations
• Mark off the centre of the hole using a centre punch
or nail.
Chuck replacement
Chuck removal
Always wear eye protection.
Turn the torque adjustment collar/hammer selection collar
(2) to the “drill” position and low gear, on the gear
selector (14). Tighten the chuck around the shorter end
of a hex key (not supplied) of 5mm or greater size. Using
a wooden mallet or similar object, strike the longer end in
the clockwise direction. This will loosen the screw inside
the chuck.
1. Open chuck jaws fully.
2. Insert a 5mm hex key into front of chuck between jaws to
engage screw head. Remove screw by turning clockwise.
3. Place the hex key in chuck and
tighten. Using a wooden mallet
or similar object, strike key
sharply in the anti-clockwise
direction. This will loosen
the chuck so that it can be
unscrewed by hand.
Chuck installation
1. Screw the chuck on
by hand as far as
it will go and insert
screw (LH thread).
2. Tighten the chuck
around the shorter
end of hex key (not
supplied) strike the
longer end in the
clockwise direction with a
wooden mallet.
3. Remove the hex key and open the jaws fully. Tighten
the screw in the centre of the chuck firmly, with the hex
key in an anti-clockwise direction.
Maintenance
• Store the tools, instruction manual and where necessary
the accessories in the original packaging. In this way
you will always have all the information and parts ready
to hand.
• Do not throw used batteries into fire or water. There is
a danger of explosion! Please hand in non-working or
used batteries, or tools with built-in batteries, to the
environmentally-safe disposal unit at a municipal waste-
disposal centre, or to your dealer.