Principal dimensions£¨mm£© |
d
|
20 |
D
|
37 |
B
|
9 |
r(min)
|
0.3 |
r1(min)
|
0.15 |
Basic load ratings(N) |
Cr
|
6950 |
Cor
|
4250 |
Basic load ratings{kgf} |
Cr
|
710 |
Cor
|
430 |
|
Value£¨fo£©
|
14.9 |
Speed ratings(rpm) |
Grease
|
28000 |
Oil
|
38000 |
Distance of action point |
a£¨mm£©
|
8.3 |
Abutment and fillet dimensions (mm) |
da(min)
|
22.5 |
Da(max)
|
34.5 |
ra(max)
|
0.3 |
|
Weight(g)
|
0.036 |
Designation |
Single row
|
7904C |
DB
|
7904DB |
DF
|
7904DF |
DT
|
7904DT |
Basic load ratings(duplex bearing)(N) |
Cr
|
11300 |
Cor
|
8500 |
Basic load ratings(duplex bearing){kgf} |
Cr
|
1150 |
Cor
|
865 |
Limiting Speed (rpm) (Duplex bearing) |
Grease
|
22000 |
Oil
|
32000 |
Distance of action point(Duplex bearing) |
a0(mm)Back-to-back arrangement
|
16.6 |
a0(mm)Face-to-face arrangement
|
1.4 |
Installation dimensions(duplex bearing) |
dbmin
|
- |
Dbmax
|
35.8 |
rbmax
|
0.15 |