Flanged ball bearings are available open, shielded or sealed. With bore sizes as small as 1mm. The smaller sizes are sometimes referred to as instrument bearings.
1) Material: Chrome steel or carbon steel
2) Cage: Steel
3) Ball: steel
4) Precision: P0/P2/P4/P5/P6
5) Vibration: V1/V2/V3/V4
6) Clearance: C0/C2/C3/C4/C5
7) Noise level: Z1/Z2/Z3/Z4
8) Application: precision instrument, low noise electromotor, automobile and motorcycle, etc.