Hitachi DS 9DVF2 Handling Instructions Manual page 33

English
(2) Tightening torque indication
The tightening torque differs depending on the type
of screw and the material being tightened.
The unit indicates the tightening torque with the
numbers "1, 3, 5 ... 22" on the cap, and the black
dots. The tightening toque at position "1" is the
weakest and the torque is strongest at the highest
number. (See Fig. 4)
(3) Adjusting the tightening torque
Rotate the cap and line up the numbers "1, 3, 5,
... 22" on the cap, or the black dots, with the triangle
mark on the outer body. Adjust the cap 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
Work
Wood
Drilling Steel
Aluminum
Machine screw
Driving
Wood screw
5. How to select tightening torque and rotational speed
Use
Machine screw
Driving
Wood screw
Wood
Drilling
Metal
CAUTION:
The selection examples shown in Table 5 should
be considered as general standard. As different
types of tightening screws and different materials
to be tightened are used in actual works proper
adjustments are naturally necessary.
When using the driver drill with a machine screw
at HIGH (high speed), a screw may damage or a
bit may loose due to the tightning torque is too
strong. Use the driver drill at LOW (low speed)
when using a machine screw.
32
Table 4
Use for drilling purpose.
Use the bit or socket matching the screw diameter.
Use after drilling a pilot hole.
Table 5
Rotating speed selection (Position of the shift knob)
Cap Position
LOW (Low speed)
For 4 mm or smaller
1 – 22
diameter screws.
For 5.5 mm or smaller
1 –
nominal diameter screws.
For 18 mm or smaller
diameters. (DS9DVF2)
For 21 mm or smaller
diameters. (DS12DVF2)
For 25 mm or smaller
diameters. (DS14DVF2)
For drilling with a metal
working drill bit.
speed. Move the shift knob in the direction of the
arrow (see Figs. 6 and 7).
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, confirm that the switch is off.
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 cap is "17" to "22", 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
off. 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 4.
Suggestions
6. Mounting and dismounting of the bit
(1) After inserting a driver bit, etc. into the keyless drill
chuck, firmly grasp the ring and tighten the sleeve
by turning it toward the right (in the clockwise
direction as viewed from the front). (See Fig. 8)
If the sleeve becomes loose during operation, tighten
it further. The tightening force becomes stronger
when the sleeve is tightened additionally.
HIGH (High speed)
For 6 mm or smaller
diameter screws.
For 3.8 mm or smaller
nominal diameter screws.
For 12 mm or smaller
diameters.