Basic size of mm

d	55
D	120
B	29

The basic rated load is kN

trends C	74.1
static state Co	45

Fatigue load limit Pu	1.9

Rated rotation speed is r/min

Refer to the speed	12000
Limit speed 1)	8000

Mass kg	1.35

model

Bearing belt stop slot	*6311-ZNR
Stop slot and stop ring	*6311-2ZNR
snap ring	SP120

Dimensions are mm

d	55
d1 ～	75.3
D1 ～	104
D3	115.21
D4	129.7
b	3.1
f	2.82
C	4.06
r1,2 min	2
r0 max	0.6

Shoulder gear and chamfer size mm

da min	66
Da max	109
db min	131
Ba min	3.5
Ca max	6.88
ra max	2

Calculation coefficient

kr	0.03
fo	13