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⅜ 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.)
⅜ Dump particles after every two or three holes when
drilling.
⅜ 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 ▲ mark position
of the change lever to that of the mode to be used.
CAUTION:
⅜ 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.
⅜ 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.
⅜ 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.
9. RCD
The use of a residual current device with a rated
residual Current of 30mA or less at all times is
recommended.
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.
2. Rotation + hammering
This rotary hammer can be set to rotation and
hammering mode by pressing the push button and
turning the change lever to the
mark (Fig. 6).
Turn the grip slightly and confirm that the clutch
has been engaged with a click.
(1) Mount the drill bit.
(2) Pull the trigger switch after applying the drill bit
tip to the drilling position. (Fig. 7)
(3) Pushing the rotary hammer forcibly is not necessary
at all. Pushing slightly so that drill dust comes out
gradually is sufficient.
CAUTION:
When the drill bit touches construction iron bar, the
bit will stop immediately and the rotary hammer
will react to revolve. Therefore grip the side handle
and handle tightly as shown in Fig. 7.
Fig. 5
Push button
Fig. 7
Fig. 6
Push button
Change lever
01e_DH28PC_ENG.p65 5/27/11, 8:47 AM7