30/7 Double Row Angular Contact Ball Bearing  detail Specifications: Metric series Material:52100 Chrome Steel Construction:Double Row Seal Type :open type Limiting Speed:39500 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