Hitachi DS 12DVC, Handling Instructions Manual

12

5

. 

How

to

select

tightening

torque

and

rotational

speed

Table

4

Use

Clutch Dial 

Position

Rotating speed selection (Position of the shift knob)

LOW (Low speed)

HIGH (High speed)

Driving

Machine screw

1 – 21

For 6 mm or smaller diameter 

screws

.

For 6 mm or smaller diameter 

screws

.

Wood screw

1 – 

For 5

.

8 mm or smaller nominal 

diameter screws

.

For 3

.

8 mm or smaller nominal 

diameter screws

.

Drilling

Wood

For 25 mm or smaller diameters

.

(DS12DVC)

For 12 mm or smaller diameters

.

For 21 mm or smaller diameters

.

(DS9DVC)

Metal

For drilling with a metal working drill 

bit

.

––––––––––––

(2)  Avoid recharging at high temperatures

.

A rechargeable battery will be hot immediately after use

.

If such a battery is recharged immediately after use, its 

internal chemical substance will deteriorate, and the 

battery life will be shortened

.

 Leave the battery and 

recharge it after it has cooled for a while

.

PRIOR

TO

OPERATION

1

. 

Setting

up

and

checking

the

work

environment

Check if the work environment is suitable by following the 

precautions

.

HOW

TO

USE

1

. 

Con

fi 

rm

the

clutch

dial

position

 (

See

Fig

. 

5

)

  The tightening torque of this unit can be adjusted 

according to the clutch dial position, at which the clutch 

dial is set

.

(1) When using this unit as a screwdriver, line up the one of 

the numbers “1, 5, 9 

...

 21” on the clutch dial, or the dots, 

with the triangle mark on the outer body

.

(2) When using this unit as a drill, align the clutch dial drill 

mark “

” with the triangle mark on the outer body

.

CAUTION

○

  The clutch dial cannot be set between the numerals “1, 5, 

9 

...

 21” or the dots

.

○

  Do not use with the clutch dial numeral between “21” 

and the line at the middle of the drill mark

.

 Doing so may 

cause damage (See 

Fig

. 

6

)

.

2

. 

Tightening

torque

adjustment

(1) Tightening torque

  Tightening torque should correspond in its intensity to 

the screw diameter

.

 When too strong torque is used, 

the screw head may be broken or be injured

.

 Be sure 

to adjust the clutch dial position according to the screw 

diameter

.

(2)  Tightening torque indication 

  The tightening torque di

ff

 ers depending on the type of 

screw and the material being tightened

.

The unit indicates the tightening torque with the numbers 

“1, 5, 9 

...

 21” on the clutch dial, and a dots

.

 The tightening 

toque at position “1” is the weakest and the torque is 

strongest at the highest number (See 

Fig

. 

5

)

.

(3)  Adjusting the tightening torque 

Rotate the clutch dial and line up the numbers “1, 5, 9 

...

21” on the clutch dial, or the dots, with the triangle mark 

on the outer body

.

 Adjust the clutch dial in the weak or the 

strong torque direction according to the torque you need

.

CAUTION

○

  The motor rotation may be locked to cease while the unit 

is used as drill

.

 While operating the driver drill, take care 

not to lock the motor

.

○

  Too long hammering may cause the screw broken due to 

excessive tightening

.

3

. 

Change

rotation

speed

  Operate the shift knob to change the rotational speed

.

Move the shift knob in the direction of the arrow (See 

Figs

. 

7

 and 

8

)

.

When the shift knob is set to “LOW”, the drill rotates at a 

low speed

.

 When set to “HIGH”, the drill rotates at a high 

speed

.

CAUTION

○

  When changing the rotational speed with the shift knob, 

con

fi

 rm that the switch is o

ff

.

  Changing the speed while the motor is rotating will 

damage the gears

.

○

  When setting the shift knob to “HIGH” (high speed) 

and the position of the clutch dial is “17” or “21”, it may 

happen that the clutch does not engaged and that the 

motor is locked

.

 In such a case, please set the shift knob 

to “LOW” (low speed)

.

○

  If the motor is locked, immediately turn the power o

ff

.

 If 

the motor is locked for a while, the motor or battery may 

be burnt

.

4

. 

The

scope

and

suggestions

for

uses

The usable scope for various types of work based on the 

mechanical structure of this unit is shown in 

Table

3

.

Table

3

Work

Suggestions

Drilling

Wood

Use for drilling purpose

.

Steel

Driving

Machine screw

Use the bit or socket matching the screw diameter

.

Wood screw

Use after drilling a pilot hole

.

000Book̲DS9DVC̲Ch.indb   12

000Book̲DS9DVC̲Ch.indb   12

2010/06/18   9:46:28

2010/06/18   9:46:28