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
Toyana AXK 3047 needle roller bearings	68/710	710x870x74	710,000	870,000
Toyana K37x42x27 needle roller bearings	633ZZ	3x13x5	3	13
Timken K20X25X22SE needle roller bearings	636	6x22x7	6	22
ISO K55x60x30 needle roller bearings	J-2212	34.925x41.275x19.05	34.925	41.275
ISO K17x22x20 needle roller bearings	6802LLU	15x24x5	15	24
INA NK18/20 needle roller bearings	NN3008	40x61x21	40	61
NSK RLM2820 needle roller bearings	6306/25-2RS	25x72x19	25	72
KOYO RNA2055 needle roller bearings	CRO-10003	500x730x440	500	730
KOYO 50BTM5825 needle roller bearings	6419	95x240x55	95	240
NTN RNA0-8X15X10 needle roller bearings	54217-MP	70x125x59.2	70	125
KOYO K12X15X13SE needle roller bearings	6832-RZ	160x200x20	160	200
110 mm x 150 mm x 40 mm INA NA4922 needle roller bearings	65BIC298	165.1x222.25x28.575	165,1	222,25