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
Timken NK18/16 needle roller bearings	6956	280x380x46	280	380
Timken AR 18 90 155 needle roller bearings	6709-2RS	45x55x6	45	55
Timken AX 6 55 78 needle roller bearings	6800	10x19x5	10	19
NBS AXK 0821 TN needle roller bearings	6308N	40x90x23	40	90
NSK MFJL-2210L needle roller bearings	NN 3008 TN/SP	40x68x21	40	68
KOYO BE202614BSB1 needle roller bearings	PCM 556040 M	55x60x40	55	60
Toyana K80X88X35 needle roller bearings	6800ZZ	10x19x5	10	19
Toyana NA6902-2RS needle roller bearings	7232DF	160x290x48	160	290
KOYO 18R2322P needle roller bearings	6816N	80x100x10	80	100
JNS NK75/35 needle roller bearings	6800VV	10x19x5	10	19