Materials and Accuracy
¡¡¡¡Bearing ring and ball are adopted with GCr15 to be made.
¡¡¡¡The Chemical of Bearing Steel No. of each country. See Table 1.
¡¡¡¡The preserving Shelf generally adoption H62 Brass Sheet of 0.8F cold rolling steel strap. punching to be made, also having plastics, phastics, phastics, phenol Adehyde and presserving shelf.
|
Country |
China |
ISO |
U.S.A. |
Germany |
Japan |
Sweden |
|
Bearing Steel No. |
GCr15 |
683/XVII1 |
(AISI)52100 |
(Din)100Cr6 |
(Jis)SUJ2 |
SKF3 | ¡¡¡¡According to the International Standard, the Accuracy of bearing can be divided into five grades: normal Grade 0.High Grade 6. Accurate grade 5. Over Accuracy Grade 4.and over the 4th grade 2.
¡¡¡¡The grade of tolerance is in accordance with the standard of GB/T 307.1-94
¡¡¡¡The Contrast of Bearing Accuracy See Table 2.
|
Country |
Standard |
Accuracy Grade |
|
China |
GB307.1 |
0 |
6 |
5 |
4 |
2 |
|
International
Standard Organization |
ISO |
0 |
P6 |
5 |
4 |
2 |
|
Sweden |
SKF |
P0 |
P6 |
P5 |
P4 |
P2 |
|
Germany |
DIN |
P0 |
P6 |
P5 |
P4
|
P2 |
|
Japan |
JIS |
P0 |
P6 |
P5 |
P4 |
P2 |
|
U.S.A. |
ANSI |
ABEC1 |
ABEC3 |
ABEC5 |
ABEC7 |
ABEC9 | Radial Clearances
¡¡¡¡The radial clearances of our bearings can be classified into C2,C3,C4 & C5 according to customer"s request.
Table of radial clearance(¦Ìm)
|
Bore Diameter |
C2 |
Standard |
C3 |
C4 |
C5 |
|
over |
to |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
|
2.5 |
6 |
0 |
7 |
2 |
13 |
8 |
23 |
- |
- |
- |
- |
|
6 |
10 |
0 |
7 |
2 |
13 |
8 |
23 |
14 |
29 |
20 |
37 |
|
10 |
18 |
0 |
9 |
3 |
18 |
11 |
25 |
18 |
33 |
25 |
45 |
|
18 |
24 |
0 |
10 |
5 |
20 |
13 |
28 |
20 |
36 |
28 |
48 |
|
24 |
30 |
1 |
11 |
5 |
20 |
13 |
28 |
23 |
41 |
30 |
53 |
|
|
40 |
1 |
11 |
6 |
20 |
15 |
33 |
28 |
46 |
40 |
64 |
|
