1. Angular contact ball bearings

There is a contact angle between the ring and the ball. The larger the contact angle, the greater the axial load capacity. The smaller the contact angle, the more conducive to high-speed rotation. Single-row bearings can withstand radial loads and unidirectional axial loads. The two single-row angular contact ball bearings combined on the back of the structure share an inner ring and an outer ring, which can bear radial load and bidirectional axial load.

Angular contact ball bearings

The main purpose:

Single row: machine tool spindle, high frequency motor, gas turbine, centrifugal separator, front wheel of small car, differential pinion shaft.

Double rows: oil pumps, roots blowers, air compressors, various transmissions, fuel injection pumps, printing machinery.

2. Self-aligning ball bearings

Double-row steel balls, the outer ring raceway is an inner spherical surface, so it can automatically adjust the axis misalignment caused by the deflection or misalignment of the shaft or housing. The tapered bore bearing can be easily installed on the shaft by using fasteners. Withstand radial load.

Self-aligning ball bearing

Main uses: woodworking machinery, textile machinery drive shaft, vertical self-aligning bearing with seat.

Three, spherical roller bearings

This type of bearing is equipped with spherical rollers between the outer ring of the spherical raceway and the inner ring of the double raceway. According to the internal structure, it is divided into four types: R, RH, RHA and SR. Because the arc center of the outer ring raceway is The center of the bearing is consistent, and it has self-aligning performance, so it can automatically adjust the axis misalignment caused by the deflection or misalignment of the shaft or housing, and can withstand radial load and bidirectional axial load.

Spherical roller bearing

Main applications: papermaking machinery, reduction gears, railway vehicle axles, rolling mill gearbox seats, rolling mill roller tables, crushers, vibrating screens, printing machinery, woodworking machinery, various industrial reducers, vertical self-aligning bearings with seats .

Fourth, thrust spherical roller bearings

In this type of bearing, the spherical rollers are arranged obliquely. Because the raceway surface of the race is spherical and has self-aligning performance, it can allow the shaft to have a certain degree of inclination, and the axial load capacity is very large. It can also bear several For radial load, oil lubrication is generally used when in use.

Thrust spherical roller bearings

Main applications: hydroelectric generators, vertical motors, propeller shafts for ships, reducers for rolling screws of rolling mills, tower cranes, coal mills, extruders, and forming machines.

Five, tapered roller bearings

This type of bearing is equipped with truncated cone-shaped rollers, which are guided by the large ribs of the inner ring. The design makes the vertices of the inner ring raceway surface, outer ring raceway surface and each conical surface of the roller rolling surface intersect with the center line of the bearing On the point. Single-row bearings can bear radial loads and unidirectional axial loads, and double-row bearings can bear radial loads and bidirectional axial loads, and are suitable for bearing heavy loads and shock loads.

Tapered Roller Bearings

Main application: Automobile: front wheel, rear wheel, transmission, differential pinion shaft. Machine tool spindles, construction machinery, large agricultural machinery, railway vehicle gear reduction devices, rolling mill roll necks and reduction devices.

Six, deep groove ball bearings

Structurally, each ring of a deep groove ball bearing has a continuous groove raceway with a cross-section approximately one third of the equatorial circumference of the ball. Deep groove ball bearings are mainly used to bear radial load, but also can bear certain axial load.

When the radial clearance of the bearing increases, it has the properties of an angular contact ball bearing and can withstand alternating axial loads in two directions. Compared with other types of bearings of the same size, this type of bearing has a small friction coefficient, high limit speed, and high accuracy. It is the preferred bearing type for users when selecting models.

Deep groove ball bearing

Main uses: automobiles, tractors, machine tools, motors, water pumps, agricultural machinery, textile machinery, etc.

Seven, thrust ball bearings

It consists of a washer-shaped raceway ring with a raceway and a ball and cage assembly. The raceway ring that matches the shaft is called the shaft ring, and the raceway ring that matches the housing is called the seat ring. The two-way bearing is matched with the secret shaft of the middle ring. The one-way bearing can bear the one-way axial load, and the two-way bearing can bear the two-way axial load (both can not bear the radial load).

Thrust ball bearing

Main uses: automobile steering pins, machine tool spindles.

8. Thrust roller bearings

Thrust roller bearings are used to bear the main axial load of the shaft, combined longitudinal load, but the longitudinal load shall not exceed 55% of the axial load. Compared with other thrust roller bearings, this type of bearing has a lower friction factor, higher speed, and has the ability to adjust the center. The rollers of type 29000 bearings are asymmetrical spherical rollers, which can reduce the relative sliding of the stick and raceway in the work, and the rollers are long and large in diameter, the number of rollers is large, and the load capacity is large. They are usually lubricated by oil. Grease lubrication can be used at low speeds.

Thrust roller bearing

Main uses: hydroelectric generators, crane hooks.

Nine, cylindrical roller bearings

The rollers of cylindrical roller bearings are usually guided by the two ribs of a bearing ring. The cage roller and the guide ring form an assembly that can be separated from the other bearing ring and is a separable bearing.

This kind of bearing is more convenient to install and disassemble, especially when the inner and outer ring and the shaft and the shell are required to be interference fit. This type of bearing is generally only used to bear radial load. Only single row bearings with ribs on the inner and outer rings can bear small steady axial loads or large intermittent axial loads.

Cylindrical Roller Bearings

Main uses: large motors, machine tool spindles, axle boxes, diesel engine crankshafts, automobiles, gearboxes to keep in mind, etc.

10. Four-point contact ball bearings

It can bear radial load and bidirectional axial load. A single bearing can replace the angular contact ball bearing with front or back combination. It is suitable for bearing pure axial load or synthetic load with large axial load component. This type of bearing can bear any direction One of the contact angles can be formed under the axial load, so the ferrule and the ball are always in contact with three points on both sides of any contact line.

Four point contact ball bearing

Main uses: aircraft jet engines, gas turbines.

11. Thrust cylindrical roller bearings

It is composed of washer-shaped raceway ring (shaft washer, seat washer), cylindrical roller and cage assembly. Cylindrical rollers are processed on a convex surface, so the pressure distribution between the roller and the raceway surface is even, and it can bear unidirectional axial load, with large axial load capacity and strong axial rigidity.

Thrust cylindrical roller bearings

Main uses: oil drilling rigs, iron and steel making machinery.

12. Thrust needle roller bearings

Separate bearings are composed of raceway rings, needle rollers and cage components, and can be combined with stamped thin raceway rings or cut thick raceway rings. Non-separable bearings are integral bearings composed of raceway rings, needle rollers and cage components that are processed by precision stamping. They can withstand unidirectional axial loads. This type of bearing occupies a small space and is conducive to the compact design of the machine. Only needle roller and cage components are used, and the mounting surface of the shaft and housing is used as the raceway surface.

Thrust needle roller bearings

Main application: Variable speed devices for automobiles, tillers, machine tools, etc.

13. Thrust tapered roller bearings

This type of bearing is equipped with truncated cone-shaped rollers (the big end is spherical), the rollers are accurately guided by the ribs of the raceway ring (shaft washer, seat ring), and the design makes the shaft and seat ring raceway surface and the roller rolling surface The vertices of each conical surface intersect at a point on the center line of the bearing. One-way bearings can bear one-way axial loads, and two-way bearings can bear two-way axial loads.

Thrust tapered roller bearings

The main purpose:

One-way: crane hook, oil rig swivel.

Bidirectional: Roll neck of rolling mill.

14. Outer spherical ball bearing with seat

The outer spherical ball bearing with seat consists of an outer spherical ball bearing with seals on both sides and a cast (or stamped steel plate) bearing seat. The internal structure of the outer spherical ball bearing is the same as that of the deep groove ball bearing, but the inner ring of this kind of bearing is wider than the outer ring, and the outer ring has a truncated spherical outer surface, which can automatically adjust the center when matched with the concave spherical surface of the bearing seat.

Main uses: mining, metallurgy, agriculture, chemical industry, textile, printing and dyeing. Conveying machinery, etc.

Select the appropriate type of bearing grease and no impurities. The amount of grease applied in the bearing cavity should be 1/3-2/3 of the space inside the bearing room.

Different types of bearings need to be installed according to the requirements of the installation process. In principle, the method of copper rod striking is not allowed in the bearing assembly, otherwise the bearing will be damaged due to uneven force on the bearing inner ring. When using the hot sleeve method to assemble the bearing, carefully check the matching dimensions of the bearing and the journal in advance. Because the hot sleeve is different from the cold sleeve, it is not easy to find the matching tolerance and interference between the journal and the bearing during the process of inserting the bearing into the hot sleeve. Whether the degree is appropriate. After the bearing is heated, the motor or other accessories should not be moved to prevent the bearing from shifting.

Before assembling the motor coupling, it is necessary to measure its matching size with the shaft diameter. At the same time, check the tightness of the keyway and the key at the end of the shaft to prevent the motor from rotating and causing noise due to the loosening of the key. Bearing information port information released