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	311NR
Dust cover on one side	311-ZNR
There are dust covers on both sides	311-2ZNR
snap ring	SP120

Dimensions are mm

d	55
d1 ～	74
D2 ～	104
D3	115.21
D4	129.7
f	2.82
b	3.1
C	4.06
r0 max	0.6
r1,2 min	2

Shoulder gear and chamfer size mm

da min	64
Da max	111
db min	131
Ba min	3.5
Ca max	6.88
ra max	2