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	8.5

model

Standard holder	*NU228ECM
Other holder 1)	J,ML

Dimensions are mm

d	140
d1 ～	-
D1 ～	217
F,E	169
r1,2 min	3
r3,4 min	3
s1)	2.5

Shoulder gear and chamfer size mm

da min	154
Da max	166
db,Da min	172
Da max	236
ra max	2.5
rb max	2.5

Calculation coefficient

kr	0.15

Corner circle

model	-
quality	-
Size B1	-
Size B2	-