What are the types of bearings, and what are the occasions for which they are used?

There are many types of bearings, which can be divided into many types according to different classification criteria. The following are some common types of bearings and their applicable occasions:

First, according to the rolling bearing size classification
Miniature bearings: suitable for high-speed slewing, low friction torque, low vibration, low noise requirements of the products, such as office equipment, micro-motor, soft drive, pressure rotor, dental dental drills, hard disk motors, stepper motors, VCR drums, toys, models, computer fans and so on.
Small bearings: used in a variety of small mechanical equipment.
Small and medium-sized bearings: used in general industrial equipment.
Medium and large bearings: used in large and medium-sized mechanical equipment.
Large bearings: used in heavy machinery and equipment.
Extra large bearings: used in super heavy machinery and equipment.
Second, according to the type of rolling body classification
Ball bearings:
Deep groove ball bearings: widely used, the most representative rolling bearings. Can accept radial load and two-way axial load, suitable for high-speed rotation and requirements of low noise, low vibration places, such as gearboxes, instruments, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery.
Self-aligning ball bearings: assembled with drum-shaped roller bearings, with the function of self-aligning, suitable for bearing heavy loads and shock loads, such as precision instruments, low-noise motors, automobiles, motorcycles, metallurgy, rolling mills, mines, petroleum, paper, cement, sugar and other industries.
Angular contact bearings: can accept radial load and axial load at the same time, the limit speed is higher, suitable for machine tool spindles, high-frequency motors, combustion turbines, centrifugal separators, small car front wheels, differential pinion shafts and so on.
Roller bearings:
Cylindrical roller bearings: roller usually by a bearing collar of two retaining edge guidelines, keep frame roller and guide collar constitute a combination of parts, can be separated from another bearing collar, is separable bearing. This type of bearing installation, dismantling is more convenient, especially when the requirements of the inner and outer ring and shaft, shell are interference fit more show the advantages. Usually only used to bear radial load, only inside and outside the circle with the edge of the single row bearings can withstand a small fixed axial load or larger intermittent axial load. Suitable for large motors, machine tool spindles, axle shaft box, diesel engine crankshaft, automobile transmission.
Tapered roller bearings: equipped with a circular table-shaped roller, roller by the inner circle of the big edge guide, design to promote the inner circle raceway surface, the outer circle raceway surface and roller rolling surface of the conical surface of the apex of the cross in the bearing center line on a point. Single row bearings can carry radial load and one-way axial load, double row bearings can carry radial load and bi-directional axial load, suitable for bearing heavy loads and shock loads, such as automobiles (front wheels, rear wheels, transmissions, differential pinion shafts), machine tool spindles, construction machinery, large-scale agricultural machinery, railroad vehicles, gear reduction devices, rolling mill roll necks and deceleration devices, aircraft jet engines, combustion turbines and so on.
Spherical roller bearings: in the spherical raceway outer ring and double raceway inner ring is equipped with spherical roller, has the performance of self-aligning, so it can automatically adjust due to the shaft or shell of the deflection or not the same heart caused by the axis of the incorrect. Can accept radial load and bi-directional axial load, especially radial load capacity, suitable for bearing heavy loads and shock loads, such as metallurgy, rolling mills, mines, petroleum, paper, cement, sugar and other industries. Thrust spherical roller bearings can accept axial and radial loads at the same time, suitable for different centricity and shaft deflection is not very sensitive to the occasion.
Needle roller bearings: solid type needle roller bearings due to the use of needle, with inner ring bearings have the same basic structure as NU type cylindrical roller bearings, the volume can be reduced, and can accept large radial load. No inner ring bearings have to use the device surface of the shaft with suitable accuracy and hardness as the raceway surface. Thrust needle roller bearings can be combined arbitrarily with punched and machined thin raceway rings (W) or cut and machined thick raceway rings (WS). Non-separating bearings are integral bearings consisting of precision stamped and machined raceway rings with needle roller and cage assemblies, which take up little space and are conducive to the compact design of machinery. Combination of needle roller bearings by the centripetal needle roller bearings and thrust bearing components combined into a compact structure, small volume, high rotational accuracy, can withstand a high radial load at the same time to withstand a certain amount of axial load, and the product structure of a variety of forms, adaptability, easy to install, is widely used in machine tools, metallurgical machinery, textile machinery, and printing machinery and so on.
Thrust cylindrical roller bearings: by the gasket-shaped raceway ring (shaft ring, seat ring) and cylindrical roller and cage components, bearing cylindrical roller selection of convex production processing, so the roller and raceway surface with each other pressure distribution is proportional to bear one-way axial load, axial load capacity is large, axial rigidity is also strong. They are suitable for oil drilling rigs, iron and steel making machinery, etc.