There are many types of bearings, but what are the specific ones? Today, Mr. Li Bearing will take you to learn about:

Rolling bearing: a bearing that performs rolling motion between supporting loads and parts that move relative to each other. It includes parts with raceways and a group of rolling elements with or without ***lation or guide elements. Can be used to withstand radial, axial, or combined radial and axial loads.

Angular contact bearings: Rolling bearings with a nominal contact angle between the ball and the ring greater than 0 ° but less than 90 °.

Outer spherical bearing: a radial rolling bearing with an outer spherical surface and a wide inner ring with locking elements. Mainly used for simple shells.

Linear motion bearing: a rolling bearing in which two raceways have relative linear motion in the rolling direction. LIGZZ Bearing

Ball bearing: The rolling element is a rolling bearing of a ball.

Deep groove ball bearing: a radial ball bearing with a continuous groove raceway with a cross-section of approximately one-third of the circumference of the ball for each ring.

Thrust ball bearing: The rolling element is a thrust rolling bearing of a ball.

Roller bearing: The rolling element is a rolling bearing of rollers.

Cylindrical roller bearing: The rolling element is a radial rolling bearing of cylindrical rollers.

Conical roller bearing: The rolling element is a radial rolling bearing of tapered rollers.

Needle roller bearing: The rolling element is a centripetal rolling bearing of a needle roller.

Spherical roller bearing: The rolling element is a self-aligning and centripetal roller bearing with convex spherical or concave surface rollers. Bearings with convex spherical rollers, with a spherical raceway on the outer ring; A bearing with concave rollers has a spherical raceway on its inner ring. LIGZZ Bearing

Thrust roller bearing: The rolling element is the thrust rolling bearing of the roller.

Thrust cylindrical roller bearing: The rolling element is a thrust rolling bearing of cylindrical rollers.

Thrust tapered roller bearing: The rolling element is a thrust rolling bearing of tapered rollers.

Thrust needle roller bearing: The rolling element is a thrust rolling bearing of a needle roller.

Thrust spherical roller bearing: The rolling element is a self-aligning thrust rolling bearing with convex spherical or concave surface rollers. The raceway of the bearing race with convex spherical rollers is spherical, while the raceway of the bearing shaft race with concave spherical rollers is spherical.

Seat bearing: A component composed of a radial bearing and a seat, with a base plate for installing screws on a support surface parallel to the bearing axis. LIGZZ Bearing

Joint bearing: The sliding contact surface is spherical, mainly suitable for spherical sliding bearings in swing motion, tilt motion, and rotational motion.

Combination bearing: a rolling bearing composed of two or more bearing structures simultaneously within a set of bearings. Such as needle roller and thrust cylindrical roller combination bearings, needle roller and thrust ball combination bearings, needle roller and angular contact ball combination bearings, etc. LIGZZ bearing

Other bearings: Rolling bearings with structures other than those mentioned above.

Below, LIGZZ bearings will introduce you to the bearing codes:

1. Basic code: Imported bearing

The basic code is used to indicate the inner diameter, diameter series, width series, and type of the bearing, usually with a maximum of five digits. It is described as follows:

1) The inner diameter of the bearing is represented by the first and H-digit numbers from the right of the basic code. For bearings with a commonly used inner diameter of d=20-480mm, the inner diameter is generally a multiple of 5. These two digits represent the quotient obtained by dividing the inner diameter size of the bearing by 5. For example, 04 represents d=20mm; 12 represents d=60mm, etc. For bearings with inner diameters of 10mm, 12mm, 15mm, and 17mm, the inner diameter codes are 00, 01, 02, and 03 in sequence. For bearings with inner diameters less than 10mm and greater than 500mm, there are other regulations on the method of inner diameter representation, which can be found in GB/T272-93.

2) The diameter series of bearings (i.e. the series of changes in outer diameter and width of bearings with the same structure and inner diameter) are represented by the third digit from the right of the basic code. For example, for radial bearings and radial thrust bearings, 0 and 1 represent the extra light series; 2 represents the light series; 3 represents the middle series; 4 represents a heavy series. The size compar***n between each series is shown in the following figure. Thrust bearings are consistent with radial bearings, except for using 1 to represent the extra light series. Longben bearing

3) The width series of bearings (i.e. the series of changes in the width of bearings with the same structure, inner diameter, and diameter series) are represented by the fourth digit from the right of the basic code. When the compar***n column of the diameter series in Figure 13-4 of the width series is 0 series (normal series), the width series code O may not be indicated in the code for most bearings, but for self-aligning roller bearings and tapered roller bearings, the width series code 0 should be indicated.

The diameter series code and width series code are collectively referred to as the size series code.

4) The bearing type code is represented by the fifth digit from the right of the basic code (using letters for type codes such as cylindrical roller bearings and needle roller bearings).

2. Post code

The post code of bearings is represented by letters and numbers to indicate the structure, tolerances, and special material requirements of the bearings. There is a lot of content in post code, and below are a few commonly used codes.

1) The internal structure code refers to the different internal structures of the same type of bearing, represented by letters following the basic code. For example, angular contact ball bearings with contact angles of 15 °, 25 °, and 40 ° are respectively represented by C, AC, and B to indicate the different internal structures.

2) The tolerance levels of bearings are divided into 6 levels, including 2, 4, 5, 6, 6X, and 0, from high to low. The codes are/PZ,/P4 '/PS,/P6,/P6X, and/PO, respectively. In the tolerance level, 6X level is only applicable to tapered roller bearings; Level 0 is a regular level and is not indicated in the wheel bearing code..

3) The commonly used radial clearance series of bearings are divided into 6 groups: 1 group, 2 groups, 0 groups, 3 groups, 4 groups, and 5 groups, with radial clearance increasing in order. O group clearance is a commonly used clearance group, which is not indicated in the bearing code. The remaining clearance groups are represented by/CI,/CZ,/C3,/C4, and/CS in the bearing code, respectively.

3. Pre code

The prefix of the bearing is used to represent the components of the bearing, represented by letters. If L is used to represent the separable ring of the separable bearing; K represents the rolling element and cage components of the bearing, etc.

There are many types of rolling bearings in practical applications, and the corresponding bearing codes are also quite complex. The codes introduced above are the most basic and commonly used parts of bearing codes. Once familiar with these codes, you can identify and select commonly used bearings. For detailed coding methods for rolling bearings, please refer to GBT272-93.

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