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9. IMPACT to ROTATION changeover (Fig. 5)
The impact drill can be switched from IMPACT
(impact plus rotation) to ROTATION (rotation only)
by simply sliding the change lever. When boring
concrete, stone, tile or similar board materials, slide
the change lever right. The drill head impacts against
the material while continuing to rotate.
When boring metal, wood or plastic, slide the change
lever fully to the left. The drill simply rotates as
an ordinary electric drill.
CAUTION
Do not use the impact drill in the IMPACT mode
if the material can be bored by rotation only. Such
action will not only reduce drill efficiency, but may
also damage the drill tip.
When changing over, ensure the change lever is
slid as far as it will go.
HOW TO USE
1. Pressure
Drilling will NOT be accelerated by placing heavy
pressure on the drill. Such action will only result
in a damaged drill bit, decreased drilling efficiency
and/or shortened service life of the drill.
2. Using a large diameter drill bit
The larger the drill bit diameter, the larger the
reactive force on your arm. Be careful not to lose
control of the drill because of this reactive force.
To maintain firm control, establish a good foothold,
hold the drill tightly with both hands, and ensure
that the drill is vertical to the material being drilled.
3. When drilling completely through the material
When the drill bit bores completely through the
material, careless handling often results in a broken,
drill bit or damage to the drill body itself due to
the sudden movement of the drill. Always be alert
and ready to release pushing force when drilling
through the material.
4. Switch operation
⅜ When the trigger is depressed, the tool rotates.
When the trigger is released, the tool stops.
⅜ The rotational speed of the drill can be controlled
by varying the amount that the trigger switch is
pulled. Speed is low when the trigger switch is
pulled slightly and increases as the trigger switch
is pulled more.
⅜ The desired rotation speed can be pre-selected with
the speed control dial.
Turn the speed control dial clockwise for higher speed
and counterclockwise for lower speed. (Fig. 6)
⅜ Pulling the trigger and pushing the stopper, it keeps
the switched-on condition which is convenient for
continuous running. When switching off, the stopper
can be disconnected by pulling the trigger again.
CAUTION
Drill at a maximum rotation speed when drilling
wooden materials.
5. When driving wood screws
(1) Selecting a suitable driver bit
Employ plus-head screws, if possible, since the
driver bit easily slips off the heads of minus-head
screws.
(2) Driving in wood screws
⅜ Prior to driving in wood screws, make holes suitable
for them on the wooden board. Apply the bit to
the screw head grooves and gently drive the screws
into the holes.
⅜ After rotating the screwdriver at low speed for a
while until a wood screw is partly driven into the
wood, squeeze the trigger more strongly to obtain
optimum driving force.
CAUTION
⅜ Exercise care in preparing a hole suitable for the
wood screws taking the hardness of the wood into
consideration.
Should the hole be excessively small or shallow,
requiring much power to drive the screw into it,
the thread of the wood screw may sometimes be
damaged.
⅜ Do not drive machine screws.
MAINTENANCE AND INSPECTION
1. Inspection the drill bit
Continued use of a worn and/or damaged drill bit
will result in reduced drilling efficiency and may
seriously overload the drill motor. Inspect the drill
bit often and replace it with a new bit as necessary.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the
screws be loose, retighten them immediately. Failure
to do so could result in serious hazard.
3. Maintenance of the motor
The motor unit winding is the very “heart” of the
power tool. Exercise due care to ensure the winding
does not become damaged and/or wet with oil or
water.
4. Servicing
Consult an authorized Service Center in the event
of power tool failure.
5. Service parts list
CAUTION:
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi authorized Service Center when
requesting repair or other maintenance.
In the operation and maintenance of power tools,
the safety regulations and standards prescribed in
each country must be observed.
MODIFICATION:
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts may be changed without
prior notice.
NOTE
Due to HITACHI’s continuing program of research and
development, the specifications herein are subject to
change without prior notice.