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
20 mm x 35 mm x 26 mm NTN NAO-20×35×26ZW needle roller bearings	63206 ZZ	30x62x23.8	30	62
30 mm x 47 mm x 16 mm IKO NAF 304716 needle roller bearings	6907-ZZ	35x55x10	35	55
KOYO YM202614 needle roller bearings	6307-2RU	35x80x21	35	80
ISO RNA5918 needle roller bearings	6701	12x18x4	12	18
NBS HK 223218 needle roller bearings	6706LLF	30x37x4	30	37
NBS HN5020 needle roller bearings	6707-2RS	35x44x5	35	44
NSK FJL-3230 needle roller bearings	636ZZ	6x22x7	6	22
NTN K85X92X26.8 needle roller bearings	672	2x4x1.2	2	4
NTN PK32X44X17.8 needle roller bearings	6332-M	160x340x68	160	340
65 mm x 95 mm x 30 mm JNS NAF 659530 needle roller bearings	7215DF	75x130x25	75	130
Timken AXK2542 needle roller bearings	6806ZZ	30x42x7	30	42
20 mm x 42 mm x 12 mm INA BXRE004-2Z needle roller bearings	68/630	630x780x69	630,000	780,000