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Type, characteristics and purpose of general bearings

Type, characteristics and purpose of general bearings


1. Deep groove ball bearing

The deep groove ball bearing is simple in structure and easy to use.It is mainly used to bear a radial load, but also can bear a certain axial load.When the radial clearance of the bearing increases, it has the function of angular contact bearing and can bear large axial load.

Compared with other types of bearings of the same size, the friction factor of such bearings is small and the limit speed is high.In the case that the high speed is not suitable for the use of reasoning ball bearings, the bearings can be used to bear the pure axial load.

2. Adjustable ball bearing

The aligning ball bearing has two columns of stiffness, the inner ring has two raceway, the outer ring raceway for the inner spherical shape, with the performance of automatic centering.It can automatically compensate the error of coaxiality caused by the distortion of shaft and shell.The bearing mainly bears radial load, while bearing radial load, can also bear a small amount of axial load, usually not used to bear pure axial load, such as pure axial load, only a column of steel ball force.

3. Angular contact ball bearing

The angular contact ball bearing has a high limit speed, which can bear both meridional load and axial load as well as pure axial load. Its axial load capacity is determined by the contact Angle and increases with the increase of the contact Angle. 

Single row angular contact ball bearing can only bear one direction of the axial load, in the bearing of the meridional load, will cause additional axial force, must be applied to the response of the reverse load, therefore, the bearing is generally used in pairs.

Double row angular contact ball bearing can bear the warp load mainly in the warp direction, axial bidirectional joint load and torch load, it can limit the shaft or double shell bidirectional axial displacement, contact Angle is 30 degrees.

Pairs of mounted angular contact bearings can be removed by the meridional load, axial joint load, can also bear the pure meridional load, series configuration can only bear a single direction of axial load, the other two configurations can bear any direction of the axial load.This type of bearing is generally selected and combined by the manufacturer and submitted to the user in pairs. After installation, the bearing is preloaded, and the ring and steel ball are in the axial preload state. Therefore, the supporting stiffness and rotation precision of the entire bearing group as a single support are improved.

4. Cylindrical roller bearing

The roller of cylindrical roller bearing is usually guided by two guard edges of a bearing ring and a cage. The roller and guide ring form a composite part, which can be separated from another bearing ring and belongs to separable bearing.This kind of bearing is easy to install and disassemble, especially when it is required that the inner, outer ring and shaft and housing are interference fit.

This type of bearing is generally only used to bear radial load, only the inside. The outer ring with the baffle edge of the single row bearing can withstand small steady axial load or large intermittent axial load.

Compared with the deep groove ball bearing with the same dimension, this kind of bearing has a larger radial load capacity.But for this kind of bearing with the shaft, shell hole and other related parts processing requirements are higher.

5. Adjustable roller bearing

There are two rows of rollers, which are mainly used for bearing radial load and axial load in either direction.The bearing has high radial load capacity, especially suitable for working under heavy load or vibration load, but can not bear the pure axial load;Good centering performance, can compensate with bearing error.

6. Tapered roller bearing

Tapered roller bearings are mainly suitable for bearing combined radial and axial loads with mainly radial load, while tapered roller bearings with large cone Angle can be used for bearing combined radial and axial loads with mainly axial load.This type of bearing is a separated bearing, the inner ring (including tapered roller and cage) and the outer ring can be installed separately.In the process of installation and use, the radial clearance and axial clearance of the bearing can be adjusted.

7. Thrust ball bearing

Thrust ball bearing is a separation bearing, the shaft ring 'seat ring can be separated from the cage' ball components.Shaft ring is matched with the shaft ring, the seat ring is matched with the bearing seat hole ring, and there is a gap between the shaft.

Thrust ball bearing can only pull hand axial load, one-way thrust ball bearing can only bear the axial load of one room, two-way thrust ball bearing can bear the axial load of two directions.

The thrust ball bears the warp direction of the shaft which cannot be restricted, and the limit speed is very low.Unidirectional thrust ball bearings can limit the axial displacement in one direction of the shaft and the housing, while bidirectional bearings can limit the axial displacement in two directions.

8. Thrust roller bearing

Thrust centering roller bearings are used for bearing axial loads. Combined meridional loads shall not exceed 55% of the axial loads.Compared with other thrust roller bearings, the friction factor of this bearing is lower, the speed is higher, and it has the ability to adjust the center.The roller of type 29000 bearing is an asymmetric spherical roller, which can reduce the relative sliding of the stick and raceway in the work, and the roller is long. The diameter is large, the number of rollers is large and the load capacity is large.In the design of selection, should give priority to the selection.

Type 80000 thrust cylindrical roller bearing. Type 90000 thrust tapered roller bearing and AXK thrust needle bearing can bear one-way axial load, it is much larger than the axial load capacity of thrust ball bearing, and the rigidity is larger, occupying less axial space.Thrust cylindrical roller bearing and thrust needle roller bearing are suitable for low speed occasions, the speed of thrust tapered roller bearing is slightly higher than that of thrust cylindrical roller bearing.

Needle roller bearing

Needle roller bearing is equipped with thin and long roller (the length of the roller is 3~10 times of the diameter, the diameter is generally no more than 5mm), so the radial structure is compact, its inner diameter size and load capacity is the same as other types of bearings at the same time, the outer diameter is the smallest, especially suitable for and radial installation size is limited by the support structure.According to the use of different occasions, can be used without inner ring of the bearing or needle roller and cage components, at this time to suit the bearing surface of the shaft neck and the shell hole directly as a bearing surface. The rolling surface, to keep the load capacity and operation performance and you have the same ring bearing, axis or shell hole hardness on the surface of the raceway. The machining accuracy and surface and surface quality should be as a bearing ring raceway.The bearing can only bear radial load.

10. Outer spherical ball bearing with seat

Outer spherical ball bearing with seat is composed of outer spherical ball bearing with seal on both sides and cast (or steel plate stamped) bearing seat.The inner structure of the outer spherical ball bearing is the same as that of the deep groove ball bearing, but the inner ring of the bearing is wider than the outer ring.Usually there is a gap between the inner hole and the shaft of this kind of bearing.Bearing structure compact, convenient loading and unloading, sealing perfect, suitable for simple support, often used in mining. Metallurgy. Agriculture. Chemical industry. Textile. Printing and dyeing. Conveying machinery. 

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