Hitachi DH 20DV Manual De Instrucciones página 18

English
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. 15)
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 3 (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. 15)
(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, re-
quiring much power to drive the screw into it, the thread of the wood screw may
sometimes be damaged.
18
Bit
Socket
Chuck adaptor (D)
Fig. 15
Front cap
Grip