Hitachi DH 30PB, Instruction And Safety Manual

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14
English
CAUTION:
䡬
Application of force more than necessary will not only reducing drilling efficiency
at all, but will deteriorate the tip edge of the drill bit and reduce the service life
of the rotary hammer in addition.
䡬
Drill bit may snap off while disengaging the rotary hammer from the jammed
hole. For disengaging, it is important to use a pushing motion or turn the drill
bit counterclockwise.
䡬
Do not attempt to drill anchor holes or holes in concrete with the main unit in
the rotation only function.
䡬
Do not attempt to use the rotary hammer in the rotation and striking function
with the drill chuck and chuck adaptor attached. This would seriously shorten
the service life of every components of the machine.
4. When driving machine screws
(Fig. 9)
First, insert the bit into the socket in
the end of chuck adaptor (D).
Next, mount chuck adaptor (D) on the
main unit using procedures described
in 6 (1), (2), (3), put the tip of the bit in
the slots in the head of the screw,
grasp the main unit and tighten the
screw.
CAUTION:
䡬
Exercise care not to excessively
prolong driving time, otherwise, the
screws may be damaged by excessive
force.
䡬
Apply the rotary hammer perpendicularly to the screw head when driving a
screw; otherwise, the screw head or bit will be damaged, or driving force will
not be fully transferred to the screw.
䡬
Do not attempt to use the rotary hammer in the rotation and striking function
with chuck adaptor (D) and bit attached.
5. When driving wood screws (Fig. 9)
(1) Selecting a suitable driver bit
Employ phillips screws, if possible, since the driver bit easily slips off the heads
of slotted-head screws.
(2) Driving in wood screws
䡬
Prior to driving in wood screws, make pilot holes suitable for them in the wooden
board. Apply the bit to the screw head grooves and gently drive the screws into
the holes.
䡬
After rotating the rotary hammer at low speed for a while until a wood screw in
partly driven into the wood, squeeze the trigger more strongly to obtain the
optimum driving force.
Fig. 9
Socket
Bit
Front Cap
Grip
Chuck
Adaptor (D)