1) Bearing series: 7000 series, 7200 series, 7300 series, QJ series, 3200 series,3300 series

2) Material of rings and balls : chrome steel:GCr15 or ceramics: Zr02 and Si3N4

3) Material of cage: steel cage , nylon cage,brass cage and PEEK PI cage,AISI SUS316

4) Precision: P0, P6,p5

5) Suffix:

a) C: contact angle is 15 E.G. 7205C

b) AC: contact angle is 25 E.G. 7206AC

c) B : contact angle is 40 E.G. 7206B

d) QJ: contact angle is 35 E.G. QJ308

6) Typical applications: the electrical household, electrical tools, machines automobile,appearance,and electric motor