Needle roller bearings

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A needle roller bearing is a special type of roller bearing which uses long, thin cylindrical rollers resembling needles. Ordinary roller bearings' rollers are only slightly longer than their diameter, but needle bearings typically have rollers that are at least four times longer than their diameter.Like all bearings, they are used to reduce the friction of a rotating surface.

Compared to ball bearings and ordinary roller bearings, needle bearings have a greater surface area in contact with the races, so they can support a greater load. They are also thinner, so they require less clearance between the axle and the surrounding structure.

Needle bearings are heavily used in automobile components such as rocker arm pivots, pumps, compressors, and transmissions. The drive shaft of a rear-wheel drive vehicle typically has at least eight needle bearings (four in each U joint) and often more if it is particularly long, or operates on steep slopes.

Bearing Number	Bore Dia	Outer DIa	Width	Size
NBS RNA 4909 RS needle roller bearings	33281/33472	71,4375	120	29,7942
FBJ HK5520 needle roller bearings	677	7x11x2.5	7	11
ISO K65x70x30 needle roller bearings	E2.YAR 207-106-2F	72x34.925x42.9	72	34,925
Toyana HK2820 needle roller bearings	6311-ZNR	55x120x29	55	120
INA BCE1110 needle roller bearings	23988	440x600x118	440	600
AST S1412 needle roller bearings	6801NKE	12x21x5	12	21
KOYO HJ-445628,2RS needle roller bearings	500.000 mm	720.000 mm	218.000 mm	553.000 mm
IKO BAM 168 needle roller bearings	678AZZ	8x12x3.5	8	12
50 mm x 68 mm x 20 mm NBS NAO 50x68x20 needle roller bearings	6408	40x110x27	40	110
Timken FNTKF-1837 needle roller bearings	677ZZ	7x11x3	7	11
AST RNA6913 needle roller bearings	N220	100x180x34	100	180
NTN K33X38X30.3 needle roller bearings	680235/680270B	596.9x685.8x31.75	596,9	685,8