Basic size of mm

d	20
D	52
B	15

The basic rated load is kN

trends C	19
static state Co	10.4

Fatigue load limit Pu	0.44

Rated rotation speed is r/min

Refer to the speed	16000
limit speed	16000

Mass kg	0.15

Model number ¹⁾

General distribution bearings	7304BECBY
Basic design bearings	7304BEY

Dimensions are mm

d	20
d1 ～	33.3
d2 ～	26.8
D1 ～	40.4
r1,2 min	1.1
r3,4 min	0.6
a	22.8

Shoulder gear and chamfer size mm

da min	27
Da max	45
db max	47.8
ra max	1
rb max	0.6