30/7-2RS Double Row Angular Contact Ball Bearing  detail Specifications: Metric series Material:52100 Chrome Steel Construction:Double Row Seal Type :2RS,Sealed on both sides Seal material:NRB Lubrication:Great Wall Motor Bearing Grease2#,3# Temperature Range: -20°to 120°C Limiting Speed:25500 rpm Cage:Nylon cage or Steel cage Cage Material:Polyamide(PA66) or Steel Weight:0.01 kg Main Dimensions: Bore diameter (d): 7mm Outer diameter (D): 19mm Width (B): 10mm Chamfer Dimension( r) min.: 0.3mm Dynamic load ratings(Cr): 3.65KN Static load ratings(Cor): 1.7KN   ABUTMENT DIMENSIONS Minimum diameter shaft shoulder (da) min. :9 mm Maximum diameter of housing shoulder (Da) max. : 17mm Maximum fillet radius (ra) max. 0.3 mm