7904 Full Ceramic Zirconia/Silicon Nitride Ball Bearing
The 7904 bearing is a ceramic angualr contact ball bearings with an inner diameter of 20 mm , an outer diameter of 37 mm, a width of 9 mm. It typically uses P0,P6,P5,P4 grade precision tolerances and open or with seals type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
ceramic bearings ZrO2/Si3N4 7904
Description: ID: 20M * OD:37MM * TH: 9MM
N.W.: ZrO2 0.028kg / Si3N4 0.015kg
Material : Si3N4 / ZrO2
What we offer :
1) Si3N4 / ZrO2 deep groove ball bearings open style ceramic bearings with PTFE / PEEK cage or the full complement deep groove ball bearings , which can reach highest 1100°
2) angular contact ceramic bearings , self-aligning ceramic bearings , single direction trust ceramic bearings ,full ceramic insert bearings with ZrO2 or Si3N4 material .
3) Hybrid ceramic bearings ,(Stainless steel or chrome steel + ceramic balls)
4) balls (stainless steel , ceramic balls , plastic bearings , steel)
Specification:
Angular contact ceramic ball bearings
Boundary dimensions(mm)
Mounting dimensions(mm)
Mass
Bearing No.
da
Da
ra
(kg) (refer)
d
D
B
r (min)
r1 (min)
min
max
max
ZrO2
Si3N4
7903CE
17
30
7
0.3
0.15
19.5
27.5
0.3
0.013
0.0071
7003CE
35
10
0.3
0.15
19.5
32.5
0.3
0.032
0.017
7203CE
40
12
0.6
0.3
22
35
0.6
0.052
0.028
7303CE
47
14
1
0.6
23
41
1
0.087
0.047
7904CE
20
37
9
0.3
0.15
22.5
34.5
0.3
0.028
0.015
7004CE
42
12
0.6
0.3
25
37
0.6
0.052
0.028
7204CE
47
14
1
0.6
26
41
1
0.082
0.045
7304CE
52
15
1.1
0.6
27
45
1
0.11
0.06
7905CE
25
42
9
0.3
0.15
27.5
39.5
0.3
0.032
0.018
7005CE
47
12
0.6
0.3
30
42
0.6
0.061
0.033
7205CE
52
15
1
0.6
31
46
1
0.099
0.054
7305CE
62
17
1.1
0.6
32
55
1
0.18
0.098
……
Hope what we offer is just what you want ,and feel free to contact me for any inquiry , thank you in advance !
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