Hitachi FDS 12DVA, Техническое и сервисное руководство

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4-1. Selling Point Descriptions
4-1-1. 22-Position Adjustable Torque Setting
The number of clutch positions has been increased from the previous five to twenty-two to ensure finer torque
setting than that of previous model, and therefore, the operability has been significantly improved. (See Fig. 1.)
Fig. 1 Clutch torque
4-1-2. Motor with Cooling Fan
The cooling fan incorporated in the motor and the air vents provided in its outer frame greatly enhance the cooling
effect, ensuring improved durability in continuous operation.
4-1-3. 10 mm Keyless Chuck
The keyless chuck facilitates fast and easy replacement of driver bits. Replacement can be carried out simply by
holding the ring with one hand, while turning the sleeve with the other hand.
4-1-4. Variable Speed Switch with Braking Function
The braking function allows the driver unit to stop rotation immediately when the trigger switch is released, which
is a convenient feature during actual working. Also, the feedback system ensures a sufficiently large torque even
in the variable speed range.
Fig. 2
Ring
Sleeve
Tighten
Loosen
Driver bit
1
60
55
50
45
40
35
30
25
20
15
10
5.9
5.4
4.9
4.4
3.9
3.4
2.9
2.5
2.0
1.5
1.0
Clutch position
Adjustable torque is about 2 kgf
•
cm
at each click within the torque range
of 10 --- 60 kgf
•
cm.
Torque (N
•
m) (kgf
•
cm)
•
3
•
5
•
7
•
9
•
11
•
13
•
15
•
17
•
19
• •
22