Deep Groove Ball Bearing Inch R Series is the most common type of rolling bearings, a wide range of uses. The basic type of deep groove ball bearing consists of an outer ring, an inner ring, a steel ball and a group of cage.

According to the size of deep groove ball bearings can be divided into:
(1) miniature bearings - nominal diameter size range of 26 mm below the bearing;
(2) small bearings - nominal diameter size range of 28-55 mm bearing;
(3) small and medium sized bearings - nominal diameter size range of 60-115 mm bearing;
(4) in the large bearing - nominal diameter size range of 120-190 mm bearing
(5) large bearings - nominal diameter size range of 200-430 mm bearing;
(6) extra large size bearing, nominal diameter range of 440 mm or more.