Rolling bearing classification introduction

A. According to the type of rolling bearing structure (1) Bearings can be divided according to the load direction or nominal contact angle they can withstand:

1) Radial Bearings - Mainly used for rolling bearings with radial loads, with a nominal contact angle from 0 to 45. According to different nominal contact angles, it can be divided into: radial contact bearings ---- radial bearings with a nominal contact angle of 0: angular contact bearings - radial bearings with a nominal contact angle greater than 0 to 45.

2) Thrust bearings - Rolling bearings are mainly used for axial loads and have a nominal contact angle of more than 45 to 90. According to different nominal contact angles, it can be divided into: Axial contact bearing ---- Thrust bearing with nominal contact angle of 90: Thrust angular contact bearing - Thrust bearing with nominal contact angle greater than 45 but less than 90.

(2) According to the types of rolling elements, bearings are divided into:

1) Ball Bearings - Rolling Balls:

2) Roller bearings - rolling elements are rollers. Roller bearings according to the type of roller, is divided into: cylindrical roller bearings ---- rolling element is a cylindrical roller bearings, cylindrical roller length and diameter ratio is less than or equal to 3; needle roller bearing ---- Rolling elements are needle roller bearings. The ratio of the length to the diameter of the needle roller is greater than 3, but the diameter is less than or equal to 5mm. The tapered roller bearing is the bearing of the tapered roller; the spherical roller bearing is one by one. Rolling elements are spherical roller bearings.

(3) Whether the bearing can be adjusted according to its work is divided into:

1) Self-aligning bearing ---- The raceway is spherical and can accommodate the angular misalignment and angular motion between the two raceway shafts.

2) Non-aligning bearings (rigid bearings) - bearings that can deflect the angular misalignment between raceways.

(4) According to the number of rows of rolling elements, the bearing is divided into:

1) Single row bearings - bearings with a row of rolling elements.

2) Double row bearings - bearings with two rows of rolling elements.

3) Multi-row bearings - bearings with more than two rows of rolling elements, such as three-row, four-row bearings.

(5) Bearings can be separated according to their components, divided into:

1) Separable bearing ---- bearing with detachable parts;

2) Inseparable bearing ---- After the bearing is finalized, the bearing ring cannot be freely separated.

(6) The bearing can be divided into a variety of structural types according to its structural shape (such as the presence or absence of a loading groove, the shape of the inner and outer rings and ferrules, the structure of the ribs, and even the presence of a retainer, etc.).

B. According to the size of the bearing, the bearing is classified according to the size of its outside diameter and divided into:

(1) Miniature bearings - Bearings with a nominal outside diameter of 26mm or less.

(2) Small bearings - Bearings with a nominal outside diameter range of 28-55mm.

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

(4) Medium-to-large-sized bearings: Bearings with a nominal diameter range of 120-190mm.

(5) Large bearings - bearings with a nominal outside diameter range of 200-430mm.

(6) Extra Large Bearings - Bearings with a nominal diameter range of 440 mm or more.