Hitachi WR12DM2, WH12DM2, WH9DM2 instruction manual For WR9DM2, Bolt Steel plate Thickness t Nut

<For WR9DM2>

	kgf·cm			N·m		5/16"⋅1-3/6"
	(in-lbs)					(M8⋅30)
	1000		100
torque	(868)	60
	600
	800		80
	(694)
Tightening	(521)
	400		40
					High strength bo			lt
	(347)
	200		20
	(174)
	0		0
					0	1	2		3
		Tightening					time: sec
		(Steel			plate		thickness
		t = 3/8" (10 mm))

English

								kgf·cm	N·m		15/32"⋅1-3/4"
								(in-lbs)					(M12⋅45)
								1400	140
								(1215)					High strength
	kgf·cm			3/8"⋅1-3/6"					120				bolt
		N·m						1200
	(in-lbs)			(M10⋅30)			torque
	(868)	100	High strength bolt					(1042)	100
	1000							1000
Tighteningtorque	(174)	80					Tightening	(868)	80
								(174)
	800							800
	(694)	60						(694)	60
	600							600
	(521)	40						(521)	40			Ordinary bolt
	400							400
				Ordinary bolt
	(347)							(347)
	200	20							20
								200
									0
	0	00		1	2	3		0		0			1	2	3
		Tightening			time: sec				Tightening					time: sec
		(Steel		plate	thickness				(Steel				plate	thickness
		t = 3/8" (10 mm))							t = 1" (25 mm))

Bolt	Steel plate
	thickness t

Nut

Fig. 20

*The following bolt is used. Ordinary bolt: Strength grade 4.8

High tensile bolt: Hardness division 12.9

(	Explanation of strength grade:
	4	— Yield point of bolt: 45,500 psi (32 kgf/mm2)
	8	— Pulling strength of bolt: 56,900 psi (40 kgf/mm2) )

Fig. 21

25