Ball Bearing Material, Tolerance, Standard.
12. July, 2010
The ring and balls of bearings are made of refining bearing steel GCr15(AISI 52100),the retainer are punched from brass strip(H62) or top quality cold-rolled steel strip (SPCC BQB402) and reinforced plastics are avail-able if necessary. The shield is made phosphatizing steel skeleton are hot pressed.
The stainless steelbearing's ring and balls are fefining stainless stell 9Cr(AISI 440C).
The chemical composition of bearing steel and stainless steel are listed are listed asfollows:
|
Steel No. |
C % |
Si % |
Mn % |
S % |
P % |
Cr % |
|
GCr15 |
0.95-1.05 |
0.15-0.3 |
0.25-0.45 |
<0.025 |
<0.025 |
1.3-1.6 |
|
9Cr18 |
0.90-1.05 |
<0.8 |
<0.8 |
0.04 |
<0.03 |
16-19 | Tolerance:
The bearing tolerance is classified as Class 2,4,5,6 and 0 accordance with the Chinese national standard GB/T307-94.The table as below makes a comparison between this classification of tolerance with Chinese national standard GB307-84 as well as ISO standard.
|
Standard |
Classification tolerance |
|
GB307-84 |
G |
E |
D |
C |
B |
|
GBT 307-94 |
0 |
6 |
5 |
4 |
2 |
|
ISO |
Normal class |
Class6 |
Class5 |
Class4 |
Class2 |
|
ANSI |
ABEC1 |
ABEC3 |
ABEC5 |
ABEC7 |
ABEC9 |
|
SKF |
P0 |
P6 |
P5 |
P4 |
P2 |
|
DIN |
P0 |
P6 |
P5 |
P4 |
P2 |
|
JIS |
0 |
6 |
5 |
4 |
2 |
Shandong Obetter bearing Company is a leading global supplier in the areas of bearings, mechatronics, services. We (OBT Group) are high-tech enterprise and professional manufacturer specicalized in ball bearing and roller bearing. we can produce non-standard bearing and machine parts as our customers request. always follows the principles of "Good Faith, Equality, Cooperation and Win-Win" to cooperate with our customers.
For further information, please contact:
Company brand: OBT Bearing
Company Name: Shandong Obetter Bearing Co., Ltd
WebSite: www.obtbearing.com
E-mail: obtbearing@163.com
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