Hitachi DB 3DL2 Handling Instructions Manual page 26

English
Operate the shift knob to change the rotational
speed. Move the shift knob in the direction of the
arrow (see Figs. 5 and 6).
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, confi rm that the switch is off .
Changing the speed while the motor is
rotating will damage the gears.
When a large force is required for
○
operation, set the shift knob to "LOW". If
"HIGH" is set and the unit is used, it may
cause the motor to burn out or
malfunction prematurely.
6. Confi rm the clutch dial position (See Fig. 7)
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 black dots, with the triangle
mark on the outer body.
(2) When using this unit as a drill, align the clutch
dial drill mark "
outer body.
CAUTION
The clutch dial cannot be set between the numerals "1, 5, 9 ... 21" or the black dots.
○
Do not use with the clutch dial numeral between "21" and the black line at the
○
middle of the drill mark. Doing so may cause damage (See Fig. 8).
7. 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 (See Fig. 7)
The tightening torque diff 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 black dots. The tightening toque at position "1" is the weakest and the torque is
strongest at the highest number.
" with the triangle mark on the
Clutch dial
Weak
Strong
Drill mark
Black line
26
Shift knob
Low
speed
Fig. 5
Shift knob
High
speed
Fig. 6
Triangle mark
Drill
mark
Fig. 7
Triangle mark
Fig. 8