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, autom obile and motorcycle, etc.
