Hitachi W 6VB2, Technical And Service Manual, Page: 8 / 25

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6-3. Screw tightening time
Tables 1 and 2 show the relationship between thrust and tightening time based on factory tests. The tightening
time may vary a little as screws are not necessarily uniform. The time information is for reference.
<W 6VB2>
Tightening condition
Teks screw:
5 dia. x 25L (13/64" x 1")
Mild steel plate: T3.2 (1/8")
120 V 60 Hz
W 6VB2 W 6VB
Mean tightening time (sec.)
C B P
2.70 3.00 2.90
3.50 2.60 --- 2.40
---
---
---
4.80
4.00
---
---
3.60
---
3.20 ---
3.60
2.70
3.20
4.00
4.20
0.40
0.60
3.40
---
2.90
3.90
---
---
0.55 --- 0.75
0.50 0.40
--- 5.70
4.30 4.00
--- 3.80
3.30 2.80 ---
Teks screw:
5 dia. x 25L (13/64" x 1")
Mild steel plate: T5 (13/64")
Teks screw:
6 dia. x 25L (15/64" x 1")
Mild steel plate: T3.2 (1/8")
Teks screw:
6 dia. x 25L (15/64" x 1")
Mild steel plate: T5 (13/64")
Wood screw
5.8 dia. x 38L (7/32" x 1-1/2")
Wood: Lauan
Power source HITACHI
230 V 50 Hz
120 V 60 Hz
230 V 50 Hz
120 V 60 Hz
120 V 60 Hz
120 V 60 Hz
230 V 50 Hz
230 V 50 Hz
230 V 50 Hz
---
---
---
---
---
Table 1
<W 8VB>
Tightening condition
Teks screw:
5 dia. x 25L (13/64" x 1")
Mild steel plate: T3.2 (1/8")
120 V 60 Hz
W 8VB
Mean tightening time (sec.)
P
3.90
4.00 ---
5.30 4.90
5.30
4.40
4.00
5.50
6.30
0.70
0.70
---
3.90
---
---
5.40
0.60
---
Teks screw:
5 dia. x 25L (13/64" x 1")
Mild steel plate: T5 (13/64")
Teks screw:
6 dia. x 25L (15/64" x 1")
Mild steel plate: T3.2 (1/8")
Teks screw:
6 dia. x 25L (15/64" x 1")
Mild steel plate: T5 (13/64")
Wood screw:
5.8 dia. x 38L (7/32" x 1-1/2")
Wood: Lauan
Power source HITACHI
230 V 50 Hz
120 V 60 Hz
230 V 50 Hz
120 V 60 Hz
120 V 60 Hz
120 V 60 Hz
230 V 50 Hz
230 V 50 Hz
230 V 50 Hz
3.80
Table 2