... : Open, Z, ZZ, RZ, 2RZ, RS, 2RS.2) Quality level: Reach the same level as the Japanese and European bearings.3) Tolerance ... ), ABEC-3 (P6), ABEC-5 (P5), ABEC-7 (P3).4) Noise level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, EMQ ... V4.5) Application: Home appliances, low noise and high speed electric motors; automotive components, pumps, machinery. Normal ...