Basic size of mm

d	630
D	920
B	170

The basic rated load is kN

trends C	4730
static state Co	9500

Fatigue load limit Pu	670

Rated rotation speed is r/min

Refer to the speed	560
limit speed	850

quality	400
model	NU20/630ECMA

Dimensions are mm

d	630
d1 ～	-
D1 ～	832
F,E	699
r1,2 min	7.5
r3,4 min	7.5
s1)	8.7

Shoulder gear and chamfer size mm

da min	658
Da max	690
db,Da min	705
Da max	892
ra max	6
rb max	6

Calculation coefficient

kr	0.14

Corner circle

model	-
quality	-
Size B1	-
Size B2	-