Hitachi DS 9DVA Instrucciones De Manejo página 9

4. Change rotation speed
Operate the shift knob to change the rotational
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.
5. Confirm the cap position (See Fig. 8)
The tightening torque of this unit can be adjusted
according to the cap position, at which the cap is
set.
(1) When using this unit as a screwdriver, line up the
one of the numbers "1, 2, 3 ... 8" on the cap with
the triangle mark on the outer body.
(2) When using this unit as a drill, line up the cap drill
mark " " with the triangle mark on the outer
body.
CAUTION
Align numbers "1, 2, 3 ... 8" on the cap and drill
mark " " with the triangle mark on the main body.
Note that it is impossible to fix the cap between
the numbers on the cap and the numbers, or
between the numbers and the drill mark.
6. Tightening torque adjustment
(1) Tightening torque
Tightening torque should correspond in its intensity
to the screw diameter. When too strong power is
used, the screw head may be broken or be injured.
Be sure to adjust the cap position according to the
screw diameter.
Table 4
Work
Wood: 21 mm
Drilling Steel: 10 mm
Aluminun: 10mm
Machine screw: 6 mm
Nut: 6 mm
Driving
Wood screw:
5.5 mm (diameter) × 63 mm (length)
8. How to select tightening torque and rotational speed
Table 5
Use
Machine screw
Driving
Wood screw
Wood
Drilling
Metal
Usable range
Cap Position
For 4 mm or smaller diameter
1 – 8
screws.
For 5.5 mm or smaller diameter
1 –
screws.
For 21 mm or smaller
diameters.
Drill dia. 10 mm max.
(2) Tightening torque indication (See Fig. 8)
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, 2, 3 ... 8" on the cap. The tightening
toque at position "1" is the weakest and the torque
is strongest at the highest number.
(3) Adjusting the tightening torque (See Fig. 8)
Rotate the cap and line up the numbers "1, 2, 3
... 8" on the cap 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.
CAUTIONS
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.
When setting the shift knob to "HIGH" (high speed)
and the position of the cap is "6" or "8", 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.
Too long hammering may cause the screw broken
due to excessive tightening.
A buzzing noise is produced when the motor is
about to rotate; This is only a noise, not a machine
failure.
7. The scope and suggestions for uses
The usable scope for various types of work based
on the mechanical structure of this unit is shown
below.
Use for drilling purposes.
Use the bit and socket matching the
screw diameter.
Use after drilling a pilot hole.
Low Speed
English
Suggestions
High Speed
For 6 mm or smaller
diameter screws.
For 3.8 mm or smaller
diameter screws.
For 18 mm or smaller
diameters.
Drill dia. 6.5 mm max.
7