1.6205 bearing, inner diameter 25mm, outside diameter 52mm, width 15mm.

2.6205, the code 6 means it is single row deep groove ball bearings. the code 2 means the combination of bearing diameter or width series series. code 05 multiplied by 5 is equal to the inner diameter of 25mm.

3 deep groove ball bearings are the most common types of rolling bearings. The basic type of a deep groove ball bearing consists of an outer ring, an inner ring, a group of steel balls and a cage. There are two kinds of deep groove ball bearings: single row and double row. deep groove ball bearing also can be divided two kinds of structures: sealed and open.  

4 open refers to the bearings without sealing structure. The dust cover material is pressed by the steel plate, and only the dust entering the bearing roller can only play a simple way. Anti oil type for the contact type oil seal, can effectively prevent the grease inside the bearing overflow.  

5 deep groove ball bearing type code 6 for single row , code 4 for double row. Its structure is simple, easy to use, is the production of the most common, the most widely used type of bearings.