Basic size of mm

d	280
D	500
B	80

The basic rated load is kN

trends C	1140
static state Co	1700

Fatigue load limit Pu	153

Rated rotation speed is r/min

Refer to the speed	1400
limit speed	1900

quality	71.5
model	NU256MA

Dimensions are mm

d	280
d1 ～	-
D1 ～	417
F,E	340
r1,2 min	5
r3,4 min	5
s1)	3.8

Shoulder gear and chamfer size mm

da min	300
Da max	333
db,Da min	344
Da max	480
ra max	4
rb max	4

Calculation coefficient

kr	0.15

Corner circle

model	-
quality	-
Size B1	-
Size B2	-