Electric motor bearing 1.high speed,high tempreture,long life 2.OEM accepted These electric motor ball bearings are available with three different noise ratings. EMQ (ZV2) low noise bearings or EMQ2 (ZV3) very low noise bearings and finally EMQ3 (ZV4) extra low noise bearings. Various radial play groups can be supplied but the most commonly stocked are CN (standard) radial play or C3 (loose) ...