Hitachi Koki dh 24pm Bedienungsanleitung Seite 11

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.
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. Replacement of the drill chuck holder or the drill bit
holder
CAUTION
Prevent accidents, make sure to turn the switch off
and disconnect the plug from the receptacle.
To avoid an injury by accident, before replacing the
chuck, remove the tipped tool.
Remove or install the drill chuck or the drill bit holder
in the procedures below.
<Removal>
Turn the lock grip in the arrow direction shown on the
lock grip and pull out the drill chuck holder or the drill
bit holder.
(If it is hard to pull out the drill chuck holder or the drill
bit holder, align the change lever with the
turn the lock grip to pull it out.) (Fig. 6)
<Installation>
(1) Mesh the lock grip with spline.
(2) Push in the lock grip, turning it in the direction shown
on the lock grip.
(3) To confirm that the lock grip is securely installed,
tentatively try to pull out the lock grip (Fig. 7)
HOW TO USE
CAUTION
To prevent accidents, make sure to turn the switch
off and disconnect the plug from the receptacle when
the drill pits and other various parts are installed or
removed. The power switch should also be turned
off during a work break and after work.
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. Continuous operation may be attained by
pulling the trigger switch and depressing the stopper.
To turn the switch OFF, pull the trigger switch again
to disengage the stopper, and release the trigger
switch to its original position.
However, the switch trigger can only be pulled in
halfway during reverse and rotates at half the speed
of forward operation.
The switch stopper is unusable during reverse.
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
bit holder installed (Fig. 8).
(1) Mount the drill bit.
(2) Pull the trigger switch after applying the drill bit tip to
the drilling position (Fig. 9).
(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. 9.
3. Rotation only
This rotation hammer can be set to rotation only
mode by pressing the push button and turning the
change lever to the
installed. (Fig. 10)
<Installation/Removal of the drill bit (Fig.11)>
CAUTION
Prevent accidents, make sure to turn the switch off
and disconnect the plug from the receptacle.
When installing or removing the drill bit, be careful
not to hurt hands with the drill bit.
(1) Installation
After inserting the drill bit in the drill chuck holder,
hold firmly the ring by hand and tighten the sleeve by
turning it clockwise (in the direction of "← GRIP.ZU")
mark and
If loosened in use, tighten strongly the sleeve. The
harder you tighten the sleeve, the stronger the
gripping force becomes.
(2) Removal
Hold firmly the ring by hand and loosen the sleeve by
turning it counterclockwise in the direction of
("OPEN.AUF.→").
CAUTION
Application of force more than necessary will not
only expedite the work, but will deteriorate the tip
edge of the drill bit and reduce the service life of the
rotary hammer in addition.
English
mark with the drill
mark with the drill chuck holder
10