English

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 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.Using the dust-collecting adapter and dust bag Using this unit with the dust-collecting adapter and dust bag attached creates a more hygienic working environment free of flying dust. Attach as shown in Fig. 8. The unit can be used as an ordinary rotary hammer when the dust-collecting adapter and dust

bag are not attached.

(1)Attaching the dust-collecting adapter and the dust bag.

a)Attaching the dust-collecting adapter.

Loosen the knob on the side handle and insert the attachment rod on the dust-collecting adapter in the mounting hole.

The adapter can be inserted from either direction A or B (see Fig. 9). Insert and push in the hose in the hose attachment hole of the main unit until it reaches the inner surface (depth 15 mm) and confirm that it is firmly fixed (see Fig. 10).

b)Attaching the dust bag.

Insert the dust bag firmly in the dust bag attachment hole on the main unit and fasten

securely (see Fig. 11).

CAUTION

￿The dust-collecting adapter and dust bag is made for use when drilling concrete. Do not use for drilling holes in metal or wood.

(2)Adjusting the dust-collecting adapter.

a) Adjusting the position of the dust-collecting adapter.

After firmly inserting the drill bit, loosen the wing bolt and drill bit tip and the end of the dust- collecting adapter in contact with each other (see Fig. 12).

b)Setting the hole-drilling depth.

Move the stopper to determine the stroke. The

stroke is the hole-drilling depth (see Fig. 12).

￿The maximum hole-drilling depth when using the dust-collecting adapter is 100 mm.

￿It is possible when using the dust-collecting adapter to use HITACHI drill bits up to a overall length of 216 mm. A hole-drilling depth of 45 mm will allow dust-collecting when the overall length of the drill bit is 116 mm.

(3)Drilling holes

When drilling holes, secure the main unit so that the end of the dust-collecting adapter contacts with the concrete surface perfectly during drilling. Dust- collecting effectiveness is reduced if the adapter is not in contact with the surface (see Fig. 13).

(4)Removing dust

Excessive dust in the dust bag will reduce dust- collecting effectiveness. Remove dust from the dust bag regularly.

Remove the dust bag from the main unit, pull out the rail and throw away the dust and clean (see Fig. 14).

4.When not using the dust-collecting adapter

When removing the dust-collecting adapter and the dust bag to use as a normal rotary hammer, insert the provided cap in the hose attachment hole. (see Fig. 15). After removing the dust bag, the air blowing out from the attachment hole is reduced and no air will blow onto your face.

5.Rotation only

Remove the dust-collecting adapter as it cannot be used. Insert the provided cap in the hose attachment hole.

This rotary hammer can be set to rotation only mode

by pussing the push button and turning the change

lever to the mark (Fig. 16).

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. 17)

(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 striking function with the drill chuck and chuck adapter attached. This would seriously shorten

the service life of every component of the machine.

6.When driving machine screws (Fig. 18)

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.

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