... material:bearing steel,GCR15 hardness:59-63HRC 22218 cc/w33 spherical roller bearings detail description:With the same center as the bearing,the ... ,metallurgical,paper-making and instructing,etc.,Industry• Single-row spherical roller bearings• Double-row spherical roller bearings 1: Size:20mm-300mm 2: Row material: Gcr15 & Gcr15SiMn ...