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
KOYO NK65/25 needle roller bearings	6800Z	10x19x5	10	19
NTN K10X14X8 needle roller bearings	68/800	800x980x82	800,000	980,000
IKO BHAM 3312 needle roller bearings	HM318400	JHM318448	JHM318410	METRIC
IKO BA 57 Z needle roller bearings	63307ZZ	35x80x34.900	35,000	80,000
KOYO RP323826 needle roller bearings	6411	55x140x33	55	140
INA NK105/26 needle roller bearings	68/670	670x820x69	670	820
Timken M-26161 needle roller bearings	6324	120x260x55	120	260
IKO RNAF 162413 needle roller bearings	6410	50x130x31	50	130
JNS RNA 6910UU needle roller bearings	68/710	710x870x74	710,000	870,000
Toyana HK6020 needle roller bearings	6306-2RS	30x72x19	30	72
KOYO ARZ 7 17 30,4 needle roller bearings	6800ZZ	10x19x5	10	19
KOYO BK2520 needle roller bearings	6904	20x37x9	20	37