A wheel bearing is a crucial part of the wheel assembly that connects the wheel and the axle. It is a set of steel balls (ball bearings) or tapers (tapered bearings), held together by a metal ring. It enables the wheel to rotate smoothly with a minimum of friction. Wheel bearings are safety critical components designed to sustain radial and axial loads caused by gravitation, acceleration, breaking & cornering forces, so they need to be replaced when they stop working properly.
These are different from the engine bearings, as there is no constant source of lubrication for the wheel bearings, which means they need to be tight enough to keep away water and road dust. They also support the entire vehicle weight while driving, which is why they suffer a lot of abuse from rough roads, potholes, as well as lateral forces when turning.
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Ball Bearing
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Deep Groove Ball Bearing
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60 **,618 ** (1008), 619**(1009),62 **, 63 **, 64 **,
160 **(70001 )
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Thrust Ball Bearing
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511 ** (81) ,512 **(82) ,513 (83) ,514 ** (84) series and Angular Contact Thrust all Bearings like: 5617 ** (1687) ,5691 ** (91681), 5692 ** (91682) series
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Angular Contact Ball bearing
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SN718 **(11068 ) ,70 ** 72 **,73 **, and B (66), C (36), AC (46) series ; otherwise include QJ and QJF series
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Roller Bearing
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Spherical Roller bearing
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239**, 230**,240**, 231**, 241**, 222**, 232**, 223**, 233**, 213**, 238**, 248**, 249**and special series include 26** i.e 2638 (3738), 2644 (3844) and so on
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Taper Roller Bearing
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329**(20079),210**(71), 320**(20071),302**(72), 322**(75), 303**(73), 313**(273),323**(76), 3519**(10979), 3529**(20979),3510**(971), 3520**(20971),3511**(10977), 3521**(20977), 3522**(975), 319**(10076),3819**(10779),3829**(20779), 3810**(777,771), 3820**(20771), 3811**(10777,777) for example: 77752, 77788, 77779 and also include Inch series bearings suchas 938/932 single and double row i.e M255410CD etc.
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Thrust Roller Bearing
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292**(90392), 293**(90393),294**(90394),994**(90194), and 9069 series.
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Cylindrical Roller Bearing
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NU10**, NU2**,NU22**, NU3**,NU23**, NU4**, N, NJ ,NUP series as well as NB, NN, NNU series of big bearings, and we also have Split Bearings 412740, 422740 used in cement industry.And FC, FCD series used inSteel Industry.
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The difference between traditional automobile bearings and automobile wheel bearings:
Traditional automobile wheel bearings are composed of two sets of tapered roller bearings or ball bearings. The installation, oiling, sealing and clearance adjustment of the bearings are all carried out on the automobile production line. This structure makes it difficult to assemble in automobile production plants, high cost, and poor reliability, and the bearings need to be cleaned, oiled and adjusted when the automobile is maintained at the repair point.
The hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings. It combines two sets of bearings as a whole. It has good assembly performance, can omit clearance adjustment, light weight, compact structure, and load capacity. Large, sealed bearings can be pre-loaded with grease, omit external wheel hub seals, and are free from maintenance. They have been widely used in cars, and there is a trend to gradually expand their applications in trucks.
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