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DH22PH
Инструкция по эксплуатации Страница: 11

Hitachi DH22PH [11/84] English

English

䡬 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.)

䡬 Dump particles after every two or three holes when

drilling.

䡬 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.

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.

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 turning the change lever to the

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 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.

3. Rotation only

This rotary hammer can be set to rotation only mode

by turning the change lever to the

mark (Fig. 8).

To drill 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.

CAUTION

䡬 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.

䡬 Drill bits may snap off while withdrawing the rotary

hammer from the drilled hole. For withdrawing, it is

important to use a pushing motion.

䡬 Do not attempt to drill anchor holes or holes in

concrete with the machine set in the rotation only

function.

䡬 Do not attempt to use the rotary hammer in the

rotation and hammering function with the drill chuck

and chuck adapter attached. This would seriously

shorten the service life of every component of the

machine.

4. When driving machine screws (Fig. 10)

First, insert the bit into the socket in the end of chuck

adapter (D).

Next, mount chuck adapter (D) on the main unit

using procedures described in 4 (1), (2), (3), put the

tip of the bit in the slots in the head of the screw,

grasp the main unit and tighten the screw.

CAUTION

䡬 Exercise care not to excessively prolong driving time,

otherwise, the screws may be damaged by excessive

force.

䡬 Apply the rotary hammer perpendicularly to the screw

head when driving the screw; otherwise, the screw

head or bit will be damaged, or driving force will not

be fully transferred to the screw.

䡬 Do not attempt to use the rotary hammer in the

rotation and hammering function with the chuck

adapter and bit attached.

5. When driving wood screws (Fig. 10)

(1) Selecting a suitable driver bit

Employ cross-recessed screws, if possible, since the

driver bit easily slips off the heads of slotted-head screws.

(2) Driving in wood screws

䡬 Prior to driving in wood screws, make pilot holes

suitable for them in the wooden board. Apply the bit

to the screw head grooves and gently drive the screws

into the holes.

䡬 After rotating the rotary hammer at low speed for a

while until the wood screw is partly driven into the

wood, squeeze the trigger more strongly to obtain

the optimum driving force.

CAUTION

Exercise care in preparing a pilot hole suitable for the

wood screw 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.

01Eng_DH22PH_EE 1/19/09, 15:0110

Hitachi DH22PH [11/84] English

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