Basic size of mm

d	55
D	120
B	29

The basic rated load is kN

trends C	79.2
static state Co	67

Fatigue load limit Pu	2.85

Rated rotation speed is r/min

Refer to the speed	10000
Limit speed 1)	6700

Mass kg	1.5

model

Bearing open type	311
Dust cover on one side	311-Z
There are dust covers on both sides	311-2Z

Dimensions are mm

d	55
d1 ～	74
D2 ～	104
r1,2 min	2

Shoulder gear and chamfer size mm

da min	64
Da max	111
ra max	2