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
NTN K110×117×24 needle roller bearings	6414	70x180x42	70	180
NSK RNA49/48TT needle roller bearings	6818-2RS	90x115x13	90	115
42,862 mm x 65,088 mm x 31,75 mm NSK HJ-324120 needle roller bearings	7014 CB/HCP4AL	110x70x20	110	70
IKO TLA 912 Z needle roller bearings	6216	80x140x26	80	140
NTN MR122016 needle roller bearings	63310LLU	50x110x44.400	50,000	110,000
KOYO K64X70X16 needle roller bearings	6904DW	18.75x37x9	18,75	37
85 mm x 130 mm x 38 mm Timken NA3085 needle roller bearings	68/750	750x920x78	750,000	920,000
Timken ARZ 7 12 26,4 needle roller bearings	6803ZZ	17x26x5	17	26
KOYO MJH-18181 needle roller bearings	6409-2RS	45x120x29	45	120
ISO RNA4844 needle roller bearings	6800LLB	10x19x5	10	19
ISO K12x15x09 needle roller bearings	639H-2RS	9x30x10	9	30
NBS K 42x48x35 needle roller bearings	68/670	670x820x69	670	820