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 RFU283420 needle roller bearings	6802VV	15x24x5	15	24
FBJ K38X46X32 needle roller bearings	3201 ZZ	12x32x15.9	12	32
NSK RLM3530 needle roller bearings	68/950	950x1150x90	950	1150
NBS K 18x24x12 needle roller bearings	68/850/1080	850x1080x82	850,000	1080,000
NBS K 15x19x10 needle roller bearings	673	3x6x2	3	6
KOYO BK1212 needle roller bearings	HH231637/HH231610	127x288.925x82.55	127	288,925
NTN NK5/10 needle roller bearings	NJ308	40x90x23	40	90
NBS K 65x70x30 needle roller bearings	68/710	710x870x74	710	870
NTN KBK17×21×25X needle roller bearings	68/900	900x1090x85	900	1090
360 mm x 480 mm x 118 mm ISO NA4972 needle roller bearings	6409	45x120x29	45	120
IKO YB 2016 needle roller bearings	6816-2RS	80x100x10	80	100
400 mm x 540 mm x 140 mm IKO NA 4980 needle roller bearings	675	5x8x2	5	8