... , 608, 609, 6000, 6001, 6002, 6003, 6004, 6005, 6006--- Open, ZZ(Steel Shields), 2RS, UG, 2RZ; 2). 6200 Series: 626, 627 ... ; No. 2: Bearing's Specifications: 1). Materials: GCr15_China/ (AISI) 52100_American/ (DIN) 100Cr6_Germany (Chrome Steel); 2). Tolerance: ABEC-1, ABEC-3, ABEC-5; 3). Vibration: Z2V2, Z3V3 ...