Deep groove ball bearings are simple in structure and easy to achieve high manufacturing accuracy compared with other types. Therefore, they are easy to be produced in a series of large batches with low manufacturing cost and are very popular in use. In addition to the basic type, deep groove ball bearing also has various types of variant structure, such as deep groove ball bearing with dustproof cover, deep groove ball bearing with rubber sealing ring, deep groove ball bearing with stopping groove, deep groove ball bearing with large load capacity of ball notch, double row deep groove ball bearing.

According to the size of deep groove ball bearing, it can be divided into:

(1) Micro bearings -- bearings with nominal outer diameter range of less than 26mm;

(2) Small bearings -- bearings with nominal outer diameter range of 28-55mm;

(3) Small and medium-sized bearings -- bearings with nominal outer diameter range of 60-115mm;

(4) Medium and large bearings -- bearings with nominal outer diameter range of 120-190mm

(5) Large bearings -- bearings with nominal outer diameter range of 200-430mm;

(6) Extra-large bearings -- bearings with nominal outer diameter range of over 440mm.