Applications; Prior To Operation; How To Use - Hitachi Koki DH 28PC Mode D'emploi

English

APPLICATIONS

Rotation and hammering function
Drilling anchor holes
Drilling holes in concrete
Drilling holes in tile
Rotation only function
Drilling in steel or wood
(with optional accessories)
Tightening machine screws, wood screws
(with optional accessories)
Hammering only function
Light-duty chiselling of concrete, groove digging
and edging.

PRIOR TO OPERATION

1. Power source
Ensure that the power source to be utilized conforms
to the power requirements specified on the product
nameplate.
2. Power switch
Ensure that the power switch is in the OFF position.
If the plug is connected to a receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, which could cause
a serious accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
4. Mounting the drill bit (Fig. 1)
CAUTION
To prevent accidents, make sure to turn the switch
off and disconnect the plug from the receptacle.
NOTE
When using tools such as bull points, drill bits, etc.,
make sure to use the genuine parts designated by
our company.
(1) Clean the shank portion of the drill bit.
(2) Insert the drill bit in a twisting manner into the tool
holder until it latches itself (Fig. 1).
(3) Check the latching by pulling on the drill bit.
(4) To remove the drill bit, fully pull the grip in the
direction of the arrow and pull out the drill bit (Fig.
2).
5. Installation of dust cup or dust collector (B)
(Optional accessories) (Fig. 3, Fig. 4)
When using a rotary hammer for upward drilling
operations attach a dust cup or dust collector (B)
to collect dust or particles for easy operation.
Installing the dust cup
Use the dust cup by attaching to the drill bit as
shown in Fig. 3.
When using a bit which has big diameter, enlarge
the center hole of the dust cup with this rotary
hammer.
Installing dust collector (B)
When using dust collector (B), insert dust collector
(B) from the tip of the bit by aligning it to the
groove on the grip (Fig. 4).
CAUTION
The dust cup and dust collector (B) are for exclusive
use of concrete drilling work. Do not use them for
wood or metal drilling work.
11
Insert dust collector (B) completely into the chuck
part of the main unit.
When turning the rotary hammer on while dust
collector (B) is detached from a concrete surface,
dust collector (B) will rotate together with the drill
bit. Make sure to turn on the switch after pressing
the dust cup on the concrete surface. (When using
dust collector (B) attached to a drill bit that has
more than 190 mm of overall length, dust collector
(B) cannot touch the concrete surface and will rotate.
Therefore please use dust collector (B) by attaching
to drill bits which have 166 mm, 160 mm, and 110
mm overall length.)
Dump particles after every two or three holes when
drilling.
Please replace the drill bit after removing dust
collector (B).
6. Selecting the driver bit
Screw heads or bits will be damaged unless a bit
appropriate for the screw diameter is employed to
drive in the screws.
7. Confirm the direction of bit rotation (Fig. 5)
The bit rotates clockwise (viewed from the rear
side) by pushing the R-side of the push button.
The L-side of the push button is pushed to turn the
bit counterclockwise.
8. Selecting the function mode
You can switch functions to the 3 modes of
"hammering only, "rotation + hammering", and
"rotation only" by turning the change lever while
pressing the push button. Set the
of the change lever to that of the mode to be used.
CAUTION:
Before operating the change lever, check and make
sure that the motor has stopped.
A failure can occur if it is operated while the motor
is running.
To operate the change lever, press the push button,
and release the lock of the change lever. Also, check
and make sure after operation that the push button
has returned and that the change lever has been
locked.
Switch the change lever without mistake. If it is
used at a position halfway, there is a fear that the
service life of the switching mechanism may be
shortened.

HOW TO USE

CAUTION:
To prevent accidents, make sure to turn the switch off
and disconnect the plug from the receptacle when the
drill bits and other various parts are installed or removed.
The power switch should also be turned off during a
work break and after work.
NOTE:
Ensure that the wing bolt in the side handle is
properly tightened before using the tool.
1. Switch operation
The rotation speed of the drill bit can be controlled
steplessly by varying the amount that the trigger
switch is pulled. Speed is low when the trigger
switch is pulled slightly and increases as the switch
is pulled more.
However, the switch trigger can only be pulled in
halfway during reverse and rotates at half the speed
of forward operation.
mark position