NingBo KaiCheng Bearings Manufacturing Co., Ltd. founded in 1988, It’s specialized in manufacturing deep groove ball bearings, tapered roller bearings, automobile bearings, r minitype series etc. The high speed and low noise bearings is our mainly produces of EMQ bearings. We are own our brand of "CIE", It is of advanced productive technique, consummate device and complete testing means. As well as we have powerful strength for new products, r minitype series and special bearings development. Form last year, We are sales about Seventy million US$ for export, About 90% produce in our factory is for export.
Bearing accuracy
Bearing accurany refers to accuracy on and rotation. According to chinese national standard, the bearing accuracy is divided into five classes: Class 0, Class 6, Class 5, Class 4 and Class 2. All of them are equivalent to ISO standard.The comparison of different accuracy classes are shown as follows: |
Comparison table of accuracy grade
|
Standard
|
Accuracy Grade
|
|
GB
ISO
ANSI
SKF
DIN
JIS
|
0
0
ABEC1
PO
PO
0
|
6
6
ABEC3
P6
P6
6
|
5
5
ABEC5
P5
P5
5
|
4
4
ABEC7
P4
P4
4
|
2
2
ABEC9
P2
P2
2
|
|
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