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
INA NK40/30-XL needle roller bearings	28TAG12	28x51.600x15.800	28,000	51,600
IKO RNA 6912 needle roller bearings	NNCL4930 V	150x210x60	150	210
IKO YB 2018 needle roller bearings	NJ1880	400x500x46	400	500
FBJ NK16/16 needle roller bearings	HM813846/HM813811	69,85	36,512	69,85 mm
INA RNAO70X90X30 needle roller bearings	6413 N	65x160x37	65	160
INA RNAO40X55X20 needle roller bearings	7.5 in	High Temperature Packing	Split Cylindrical Expansion Type	Four-Bolt Plummer Block
INA SN810 needle roller bearings	68/630	630x780x69	630	780
NSK J-2016 needle roller bearings	6800ZZ	10x19x5	10	19
NTN RNAO-30×42×16 needle roller bearings	6700	10x15x3	10	15
KOYO AX 35 53 needle roller bearings	HK2216	22x28x16	22	28
40 mm x 62 mm x 40 mm IKO NA 6908 needle roller bearings	6803LLB	17x26x5	17	26
NSK FWF-202410 needle roller bearings	638	8x28x9	8	28