Basic size of mm

d	140
D	250
B	42

The basic rated load is kN

trends C	450
static state Co	510

Fatigue load limit Pu	57

Rated rotation speed is r/min

Refer to the speed	2800
limit speed	3200

Specification standard holder	8.9

model

Standard holder	*NUP228ECM
Other holder 1)	ML

Dimensions are mm

d	140
d1 ～	179
D1 ～	217
F,E	169
r1,2 min	3
r3,4 min	3
s1)	-

Shoulder gear and chamfer size mm

da min	154
Da max	-
db,Da min	183
Da max	236
ra max	2.5
rb max	2.5

Calculation coefficient

kr	0.15

Corner circle

model	-
quality	-
Size B1	-
Size B2	-