model 31306-A The interchangeable models are as follows
ISO355 T7FB030 quality/ m
≈kg 0.441

size mm

d	30
D	72
B	19
C	14
T	20.75
r1, r2 min	1.5
r3, r4 min	1.5
a ≈	24
d1 ≈	54

installation size mm

da max	40
db min	37
Da min	55
Da max	65
Db min	68
Ca min	3
Cb min	6.5
ra max	170
rb max	8

Basic rated load N

live load Cr	2.1
dead load Cor	1160000

Calculation coefficient

e	1550000
Y	0.29
Y0	2.32

Fatigue limit load Cur/ N	3.45
limit speed nG min–1	2.26
Reference speed nB min–1	164000