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
IKO RNA 6906UU needle roller bearings	698H	8x19x6	8	19
NSK M-591 needle roller bearings	673SSA	3x6x2.5	3	6
INA SCE1011P needle roller bearings	6806ZZ	30x42x7	30	42
KOYO WJ-101410 needle roller bearings	W 6208-2RS1	80x40x18	80	40
NSK BH-57 needle roller bearings	6832	160x200x20	160	200
INA SCE2012P needle roller bearings	68/750	750x920x78	750	920
Toyana NA4906 needle roller bearings	674ASSA	4x7x2.5	4	7
SKF RNA6902 needle roller bearings	63213 ZZ	65x120x38.1	65	120
INA 712147610 needle roller bearings	METRIC	1/12	172.400 Kg	YMB
NTN KJ30X35X24.8 needle roller bearings	6703ZZ	17x23x4	17	23
NTN K21X25X17 needle roller bearings	6802ZZ	15x24x5	15	24
KOYO RF405530 needle roller bearings	6305 ETN9	62x25x17	62	25