Global Machinery Company HD1400K - Manual (Page 10)

10
Chuck replacement
Chuck removal
Always wear eye protection.
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 phillips head screwdriver 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 a
1/4”or large 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.
Hints for use
Note. When drilling into masonry the drilling rate is fast
and burnout of the tip will occur if the drill bit is not
constantly cleared.
• Use only correctly sharpened drill bits, which are
suitable for the material being drilled.
• To drill hard materials, firm pressure is required on
the power tool. However, excessive pressure does not
improve performance and places unnecessary pressure
on the tool and its bit.
• When screw driving always use a pilot hole and set the
speed dial to low. Press firmly on the screw head and
pull the trigger gradually increasing the speed. It is
always wiser to test the screw driving on a scrap piece
of the same material you are using.
• Larger diameter holes in hard wood, steel and concrete
have to be drilled at slower speeds. However, the motor
must not be struggling with the operation. If the motor
is struggling DO NOT continue working, pull the drill
clear of the workpiece and run it on fast speed for a
minute or so allowing the motor time to cool down
before you continue with the task. If the job is too
hard for the drill do not continue otherwise you could
permanently damage the motor.
• Concrete drilling should be carried out on the highest
speed.
DO NOT overload motor when drilling concrete.
DO NOT use too much pressure as the hammer action
relies on the drill bit being able to move back and forward
in the hole being drilled.
Always clear the flutes of the drill bit by removing it from
the hole regularly.