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Classification Of Rolling Bearings

Classification of rolling bearings

The working principle of rolling bearing developed on the basis of sliding bearing is to replace sliding friction with rolling friction. It is generally composed of two rings, a group of rolling elements and a cage. Classification Of Rolling Bearings It is a mechanical basic part with strong universality, high standardization and high degree of serialization.

Due to different working conditions of various machines, different requirements are put forward for rolling bearings in terms of load capacity, structure and service performance. Classification Of Rolling Bearings Therefore, rolling bearings need a variety of structures. However, the basic structure is composed of inner ring, outer ring, rolling element and cage.

The functions of various parts in the bearing are:

For radial bearings, the inner ring usually fits tightly with the shaft and runs together with the shaft. The outer ring usually forms a transitional fit with the bearing seat or mechanical shell hole to play a supporting role. However, in some cases, the outer ring also operates, Classification Of Rolling Bearings the inner ring is fixed to play a supporting role, or both the inner ring and the outer ring operate at the same time.

For the thrust bearing, the shaft ring which is tightly matched with the shaft and moves together is called the shaft ring, and the bearing seat or Classification Of Rolling Bearings mechanical shell hole is called the seat ring which is transiently matched and plays a supporting role. Rolling elements (steel balls, rollers or needles) are usually evenly arranged between two rings in the bearing for rolling movement with the help of cage.

Its shape, size and quantity directly affect the load capacity and service performance of the bearing. Cage can not only evenly separate the rolling elements, but also rotate the Classification Of Rolling Bearings rolling elements and improve the internal lubrication performance of the bearing.

Classification Of Rolling Bearings

1. Classification by rolling bearing structure type

(1) According to the load direction or nominal contact angle it can bear, the Classification Of Rolling Bearings is divided into:

1) Radial bearing —- it is mainly used for rolling bearing bearing bearing radial load, and its nominal contact angle Classification Of Rolling Bearings is from 0 to 45. According to different nominal contact angles, it is divided into radial contact bearing – radial bearing with nominal contact angle of 0: radial angular contact bearing – radial bearing with nominal contact angle greater than 0 to 45.

2) Thrust bearing —- rolling bearing mainly used to bear axial load, and its nominal contact angle is greater than 45 to 90. According to different nominal contact angles, it is divided into axial contact bearing – thrust bearing with nominal contact angle of 90: thrust angle contact bearing – thrust bearing Classification Of Rolling Bearings 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 bearing – the rolling element is a ball:

2) Roller bearing —- the rolling element is a roller. According to the types of rollers, roller bearings are divided into: cylindrical roller bearings – rolling elements are cylindrical roller Classification Of Rolling Bearings bearings, and the ratio of length to diameter of cylindrical rollers is less than or equal to

3; Needle roller bearing – the rolling element is a needle roller bearing. 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; Tapered roller bearing —- the rolling element is the bearing of tapered roller; Self aligning roller bearing – the rolling element is a spherical roller bearing.

(3) Bearings can be divided into:

1) Self aligning bearing – the raceway is spherical and can adapt to the angular deviation and angular movement between the axis lines of the Classification Of Rolling Bearings two raceways;

2) Non self aligning bearing (rigid bearing) — a bearing that Classification Of Rolling Bearings can resist the axial line angle offset between raceways.

(4) According to the number of columns of rolling elements, bearings are divided into:

1) Single row bearing —- bearing with one row of rolling elements;

2) Double row bearing – bearing with two rows of rolling elements;

3) Multi row bearings —- bearings with more than Classification Of Rolling Bearings two rows of rolling elements, such as three row and four row bearings.

(5) Bearings are divided into:

1) Separable bearing —- bearing with separable parts;

2) Non separable bearing —- a bearing in which the ferrule cannot be separated freely after the Classification Of Rolling Bearings is finally matched.

(6) The bearing can also be divided into various structural types

according to its structural shape (such as whether there is a filling groove, whether Classification Of Rolling Bearings there is an inner ring, an outer ring and a ferrule, the structure of the retaining edge, and even whether there is a cage).

2. According to the size of rolling bearing, the bearing is divided into:

(1) Miniature bearing — bearing with nominal outer diameter less than 26mm;

(2) Small bearings — bearings with nominal outer diameter ranging from 28 to 55 mm;

(3) Small and medium-sized bearings — bearings with nominal outer diameter ranging from 60 to 115mm;

(4) Medium and large bearings — bearings with nominal outer diameter ranging from 120 to 190mm

(5) Large bearing — bearing with nominal outer diameter ranging from 200 to 430mm;

(6) Extra large bearing —- bearing with nominal outer diameter