English

When using a rotary hammer for upward drilling operations attach a dust cup or a dust collector (B) to collect dust or particles for easy operation.

￿Installing the dust cup

Use the dust cup by attaching to the drill bit as shown in Fig. 7.

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. 8)

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 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).

4.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.

5.Confirm the direction of bit rotation (Fig. 9) 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. (See Fig. 9) (The L and R marks are provided on the body.)

CAUTION

The push button cannot be switched while the power tool is turning. To switch the push button, stop the power tool, then set the push button.

6.Continuous drilling

The number of holes that can be drilled in concrete after one recharge is shown in Table 4.

Table 4

Bit dia.

Depth

Possible continuous

drilling number

(holes)

(mm)

(mm)

 

 

DH14DSL

 

DH18DSL

*3.5

 

65

 

110

4

 

98

 

122

5

 

80

 

113

6

30

72

 

105

8

 

55

 

77

10

 

48

 

64

12

 

41

 

57

14

 

34

 

47

16

 

22

 

32

* Use an adapter for a small diameter bit.

These data are for the referential values. The number of holes that can be drilled varies according to the sharpness of the used bit or the conditions of the concrete being drilled.

CAUTION

When using this unit continuously, the unit may overheat, leading to damage in the motor and switch. Please leave it without using it for approximately 15 minutes.

HOW TO USE

1. Switch operation

￿When the switch trigger is depressed, the tool rotates. When the switch trigger is released, the tool stops.

￿The rotational speed of the rotary hammer can be controlled by varying the amount that the switch trigger is pulled. Speed is low when the switch trigger is pulled slightly and increases as the switch trigger is pulled more.

￿When releasing the switch trigger, the brake will be applied for immediate stopping.

2. Rotation + Hammering

Turn the change lever fully in the direction of the

“” mark to set “rotation + hammering”.

(1)Mount the drill bit.

(2)Pull the trigger switch after applying the drill bit tip to the drilling position. (Fig. 10)

(3)Pushing the rotary hammer 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 rotary hammer will react to revolve. Therefore please grip the side handle and handle tightly as shown in Fig. 11.

3.Rotation only

Turn the change lever fully in the direction of the “” mark to set “rotation only”. (Fig. 10)

To drill a wood or metal material using the optional drill chuck and chuck adapter, proceed as follows.

Installing drill chuck and chuck adapter: (Fig. 12)

(1)Attach the drill chuck to the chuck adaptor.

(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 work at all, but will deteriorate the tip edge of the drill bit and reduce the service life of the rotary hammer in addition.

￿Drill bit 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 use the rotary hammer in the rotation and striking mode with the drill chuck and chuck adapter attached. This would seriously shorten the service life of every component of the machine.

4.When driving wood screws (Fig. 13)

(1)Selecting a suitable driver bit

Employ plus-head screws, if possible, since the driver bit easily slips off the heads of slotted-head screws.

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