1 according to the rolling bearing (imported bearing) structure type classification

(1) according to the load direction or the nominal contact angle, the inlet bearing can be divided into:

1) radial bearings - important for bearing the radial load of the rolling bearings, the nominal contact angle from 0 to 45. According to the nominal contact angle is different, it is divided into: radial contact bearing - nominal contact angle of 0 of the radial bearings: contact angle contact bearing - nominal contact angle greater than 0 to 45 of the radial bearings.

2) thrust bearing, which is important to bear the axial load of rolling bearings, the nominal contact angle is greater than 45 to 90. According to the nominal contact angle is divided into: axial contact bearing - nominal contact angle of 90 of the thrust bearing: thrust angular contact bearing - nominal contact angle greater than 45 but less than 90 of the thrust bearing.

(2) according to the rolling element bearing varieties, divided into:

1) ball bearings - rolling ball:

2) roller bearing roller. Roller bearings according to the roller of varieties, is divided into: cylindrical roller bearing, rolling body is cylindrical roller bearings, cylindrical roller length and diameter ratio is less than or equal to 3; needle roller bearings - rolling body is needle roller bearings, needle length and diameter ratio is more than 3, but diameter is less than or equal to 5mm; tapered roller bearings - rolling body is tapered roller bearings; spherical roller bearing one by one rolling body is spherical roller bearing.

(3) whether the imported bearings are adjusted according to their tasks, divided into:

1) aligning roller bearing, the roller way is spherical, can adapt to the angle deviation and angular motion of the two roller track axis line;

2) non aligning roller bearing (rigid bearing) - bearing with the angle of the axis line of the shaft line of the bearing.

(4) the number of columns of the imported bearings by the rolling elements is divided into:

1) single row bearing - bearing with a row of rolling elements;

2) double row bearings - two row roller bearing;

3), with more than two columns bearing rolling body bearing, such as three or four column bearing.

(5) whether the imported bearings are divided into:

1) can be respectively bearing - with the components of the bearing;

2) can not be respectively in the final - bearing bearing supporting, bearing rings are not arbitrary free respectively.

(6) imports the bearing according to the configuration (such as with or without filling slots, there is no, the outer ring and the ring shape, retaining edge structure, even without maintenance frame etc.) can also be divided into a variety of structural types.

2 according to the size of the rolling bearing size classification bearing according to its diameter size, divided into:

(1) miniature bearings - nominal diameter size of the size of 26mm below the bearing;

(2) small bearings - nominal diameter size of the size of the 28-55mm bearing;

(3) small and medium sized bearings - nominal diameter size scale of 60-115mm bearing;

(4) in the large bearing - nominal diameter size of the size of the 120-190mm bearing

(5) large bearings - nominal diameter size of the size of the 200-430mm bearing;

(6) extra large size bearing, nominal diameter of 440mm or more.