Bearing set, 2 pcs. 6006 2RS 30X55x13 MGK inner diameter(d): 30outer diameter(D): 55width(B): 13seal: double-sided rubberring material: bearing steel Single row deep groove ball bearings. Single row deep groove ball bearings have relatively deep raceways in both rings, do not have a channel for inserting balls and are non-separable. The optimal size of the balls and their adjustment to the raceway provide these bearings with high load capacity. These bearings can support axial and radial loads in both directions and can be used even at high rotational speeds. They are produced in a wide range of types and are the most widely used type of rolling bearings.