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)	6300

Mass kg	1.35

model

Both sides are sealed	*6311-2Z
One side is sealed	*6311-Z

Dimensions are mm

d	55
d1 ～	75.3
D2 ～	104
r1,2 min	2

Shoulder gear and chamfer size mm

da min	66
Da max	109
ra max	2

Calculation coefficient

kr	0.03
fo	13