needle roller bearings

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
NSK YH-108 needle roller bearings	6813N	65x85x10	65	85
FBJ K40X45X21 needle roller bearings	6324-ZZ	120x260x55	120	260
22 mm x 30 mm x 20 mm ZEN NK22/20 needle roller bearings	NNCL4964 V	320x440x118	320	440
Timken RNA4904 needle roller bearings	6702-2RS	15x21x4	15	21
ZEN HK4012 needle roller bearings	674ASSA	4x7x2.5	4	7
IKO KT 182620 needle roller bearings	6319NK	95x200x45	95	200
40 mm x 55 mm x 30 mm IKO TAFI 405530 needle roller bearings	6413	160x65x37	160	65
ISO K32x38x20 needle roller bearings	6804-2RU	20x32x7	20	32
IKO YTL 1210 needle roller bearings	6704LLF	20x27x4	20	27
AST SCE129P needle roller bearings	6803-2RS	17x26x5	17	26
IKO TAM 1819 needle roller bearings	6403	17x62x17	17	62
IKO TAM 2830 needle roller bearings	NJ 322	110x240x50	110	240