1) Sealing form: Open, Z, ZZ, RS, 2RS, 2RZ
2) Locating snap ring: N, NR
3) Accuracy grade: ABEC-1, ABEC-3, ABEC-5, ABEC-7
4) Vibration level: V1, V2, V3, V4
5) Noise level: Z1, Z2, Z3, Z4
6) Inner windage code: C0, C2, C3, C4, C5
7) Material of bearing: GCr15, GCR11
8) Retainer: Stainless steel, PTFE, nylon
9) Ferrule and ball rigidity: 59 - 63HRC
Description:
Z: On behalf the single-side metal of deep groove ball bearings is metal dustproof lid, ZZ: Both sides are metal dustproof lid
RS: Single side is non-contact rubber sealed ring, 2RS: Both sides are non-contact rubber sealed ring
RZ: Single side is contact rubber sealed ring, 2RZ: Both sides are contact rubber sealed ring