3218-2Z Double Row Angular Contact Ball Bearing  detail Specifications: Metric series Material: 52100 Chrome Steel Construction: Double Row Seal Type : 2Z,Sealed on both sides Seal material : Metal Lubrication:Great Wall Motor Bearing Grease2#,3# Temperature Range:  -20°to 120°C Limiting Speed: 2370 rpm Cage: Nylon cage or Steel cage Cage Material: Polyamide(PA66) or Steel Weight: 3.87 kg Main Dimensions: Bore diameter (d) : 90 mm Outer diameter (D) : 160 mm Width (B) : 52.4 mm Chamfer Dimension( r) min.: 2 mm Dynamic load ratings(Cr) :125 KN Static load ratings(Cor): 170 KN   ABUTMENT DIMENSIONS Minimum diameter shaft shoulder (da) min. : 104 mm Maximum diameter of housing shoulder (Da) max. : 146 mm Maximum fillet radius (ra) max. : 2 mm