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
NTN ARXJ29.3X49X8.8 needle roller bearings	6800ZZ	10x19x5	10	19
KOYO B2816 needle roller bearings	6801DD	12x21x5	12	21
INA SCE1616 needle roller bearings	676AZZ	6x10x3	6	10
KOYO WJ-566416 needle roller bearings	673	3x6x2	3	6
IKO TAM 3230 needle roller bearings	6824-ZZ	120x150x16	120	150
AST RNA4864 needle roller bearings	9109P	45x75x16	45	75
30 mm x 47 mm x 31 mm JNS NA 6906UU needle roller bearings	6308-Z-NR	40x90x23	40	90
KOYO K9X12X13FV needle roller bearings	675	5x8x2	5	8
Timken B-3220 needle roller bearings	F697H-2RS	7x17x5	7	17
NTN K55X63X20 needle roller bearings	7314 A	70x150x35	70	150
NBS K 45x59x36 needle roller bearings	61915	75x105x16	75	105
NTN RNA2203XLL needle roller bearings	6800LLU	10x19x5	10	19