Basic size of mm

d	530
D	780
B	145

The basic rated load is kN

trends C	3740
static state Co	7350

Fatigue load limit Pu	550

Rated rotation speed is r/min

Refer to the speed	670
limit speed	1000

quality	255
model	NU20/530ECMA

Dimensions are mm

d	530
d1 ～	-
D1 ～	704
F,E	591
r1,2 min	6
r3,4 min	6
s1)	6.8

Shoulder gear and chamfer size mm

da min	553
Da max	587
db,Da min	596
Da max	757
ra max	5
rb max	5

Calculation coefficient

kr	0.14

Corner circle

model	-
quality	-
Size B1	-
Size B2	-