Hitachi DH 25PB Manual De Instrucciones página 13

CAUTION:
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.
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.
Do not attempt to drill anchor holes or holes in concrete with the main unit in the
rotation only function.
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:
Exercise care not to excessively prolong
driving time, otherwise, the screws may be
damaged by excessive force.
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.
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
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.
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.
CAUTION:
Exercise care in preparing a pilot hole suitable for the wood screw taking the hardness
of the wood into consideration. Should the hole be excessively small or shallow,
Bit
Socket
Chuck
adaptor (D)
Fig. 9
English
Front cap
Grip
13