Basic size of mm

d	670
D	980
B	180

The basic rated load is kN

trends C	5390
static state Co	11000

Fatigue load limit Pu	750

Rated rotation speed is r/min

Refer to the speed	500
limit speed	800

quality	480
model	NU20/670ECMA

Dimensions are mm

d	670
d1 ～	-
D1 ～	890
F,E	746
r1,2 min	7.5
r3,4 min	7.5
s1)	7

Shoulder gear and chamfer size mm

da min	698
Da max	736
db,Da min	752
Da max	952
ra max	6
rb max	6

Calculation coefficient

kr	0.14

Corner circle

model	-
quality	-
Size B1	-
Size B2	-