Hitachi DH 18VB, Handling Instructions Manual, Page: 34 / 38

English
32
APPLICATIONS
Rotation and striking function
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Drilling anchor holes
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Drilling holes in concrete
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Drilling holes in tile
Rotation only function
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Drilling in steel or wood
(with optional accessories)
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Tightening machine screws, wood screws.
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 power receptacle while the
power switch is in the ON position, the power tool will
start operating immediately, inviting serious accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficientthickness
and rated capacity. The extension cord should be kept
as short as practicable.
4. Attaching the side handle (Fig. 1)
(1) Turn the grip of the side handle to loosen it and push
it in until it comes in contact with the housing.
(2) Adjust the side handle to the angle that allows the
easiest use, then turn the side handle’s grip firmly to
lock it place.
5. Mounting the drill bit (Fig. 2)
(1) To attach a drill bit (SDS-plus shank), fully pull the grip
in the direction of the arrow as shown in Fig. 2 and
insert the drill bit as far as it will go while rotating.
(2) By releasing the grip, the drill bit will be secured.
(3) To remove the drill bit, fully pull the grip in the
direction of the arrow and pull out the drill bit.
6. Installation of dust cup or dust collector (B) (Optional
accessories) (Fig. 3, Fig. 4)
When using a hammer drill for upward drilling
operations attach a dust cup or a dust collector (B) to
collect dust or particles for easy operation.
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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 hammer drill.
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Installing the dust collector (B)
When using the dust collector (B), insert the dust
collector (B) from the tip of the bit by aligning it to the
groove on the grip. (Fig. 4).
CAUTION:
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The dust cup and the dust collector (B) are for exclusive
use of concrete drilling work. Do not use them for
wood or metal drilling work.
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Insert the dust collector (B) completely into the chuck
part of the main unit.
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When turning the hammer drill on while the dust
collector (B) is detached from a concrete surface, the
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 the dust
collector (B) attached to a drill bit that has more than
190 mm of overall length, the dust collector (B) cannot
touch the concrete surface and will rotate. Therefore
please use the dust collector (B) by attaching to drill
bits which have 166 mm, 160 mm and 110 mm overall
length.
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Dump particles after every two or three holes when
drilling.
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Please replace the drill bit after removing the dust
collector (B).
7. 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.
8. Confirm the direction of bit rotation (Fig. 5)
The bit rotates clockwise (viewed from the rear side)
by pushing the R-side of the reversing switch lever.
The L-side of the lever is pushed to turn the bit
counterclockwise.
HOW TO USE
1. Switch operation
The rotational speed of the drill bit 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 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.
2. Ro striking
This hammer drill can be set to rotation and striking
mode by rotating the selector lever fully counter-
clockwise to
mark. (Fig. 6)
(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 hammer drill forcibly is not necessary at
all. Pushing slightly so that drill dust comes out
gradually is just sufficient.
CAUTION:
When the drill bit touches construction iron bar, the bit
will stop immediately and the hammer drill will react
to revolve. Therefore please grip the side handle and
handle tightly as shown in Fig. 7.
3. Rotation only
The hammer drill can be set to rotation only mode by
rotating the change lever fully clockwise to mark.
(Fig. 8)
To drill a wood or metal material using the drill chuck
and chuck adapter (optional accessories), proceed as
follows. Installing drill chuck and chuck adapter:
(Fig. 9)
(1) Attach the drill chuck to the chuck adapter.
(2) The part of the SDS-plus shank is the same as the drill
bit. Therefore, refer to the item of “Mounting the drill
bit” for attaching it.