Hitachi WR9DM2 Manuale Utente Scaricare il pdf (Pagina 25)

English

100

1 2 3

1000

800

600

400

200

(868)

(694)

(521)

(347)

(174)

100

1 2 3

1000

800

600

400

200

(868)

(694)

(521)

(347)

(174)

1 2 3

140

120

100

(1215)

(1042)

(868)

(694)

(521)

(347)

(174)

1400

1200

1000

800

600

400

200

Tightening torque

High strength

bolt

High strength bolt

kgf·cm

N·m

3/8"×1-3/6"

(in-lbs) (M10×30)

kgf·cm

N·m

15/32"×1-3/4"

(in-lbs) (M12×45)

kgf·cm

N·m

5/16"×1-3/6"

(in-lbs) (M8×30)

Ordinary bolt

Tightening time: sec

(Steel plate thickness

t = 3/8" (10 mm))

Tightening time: sec

(Steel plate thickness

t = 3/8" (10 mm))

Fig. 20

Tightening time: sec

(Steel plate thickness

t = 1" (25 mm))

Bolt

Steel plate

thickness t

Explanation of strength grade:

4 — Yield point of bolt: 45,500 psi (32 kgf/mm

)

8 — Pulling strength of bolt: 56,900 psi (40 kgf/mm

)

*The following bolt is used.

Ordinary bolt: Strength grade 4.8

High tensile bolt: Hardness division 12.9

(

)

Fig. 21

Nut

High strength bolt

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 107 108

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Hitachi WR9DM2 Manuale Utente Pagina 25

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