1. Number of row: double
2. Structure: A case and inner circle, two pairs of steel balls and two groups of retainer
 

The standard double row deep groove ball bearings are 4200A series and 4300A series. Type A shaft hasn’t the gap of putting the balls in. Two enhanced nylon keep frame inserted respectively in both sides of the bearing. Double row deep ball bearing can bear axial load and their radial load capacity is 1.62 times than single row deep groove ball bearings.