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DH28PC
Инструкция по эксплуатации Страница: 13

Hitachi DH28PC [13/92] English

English

 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. 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:

 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.

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.

3. Rotation only

This rotary hammer can be set to rotation only mode

by pussing the push button and turning the change

lever to the

mark. (Fig. 8)

Turn the grip slightly and confirm that the clutch has

been engaged with a click.

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

 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.

 Drill bits may snap off while withdrawing the rotary

hammer from the drilled hole. For withdrawing, it is

important to use a pushing motion.

 Do not attempt to drill anchor holes or holes in

concrete with the machine set in the rotation only

function.

 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.

Hitachi DH28PC [13/92] English

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