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
Toyana K14x18x14 needle roller bearings	6417-M	85x210x52	85	210
ISO K16x20x10 needle roller bearings	7224CPA	120x215x40	120	215
KOYO 18BTM2412 needle roller bearings	NN3015K	75x105x30	75	105
Timken B-810 needle roller bearings	6909Z	45x68x12	45	68
NSK FBNP-81110 needle roller bearings	6304-2Z/VA228	52x20x15	52	20
NTN K100X107X31 needle roller bearings	6801ZZ	12x21x5	12	21
NTN PK44.4XPK53.9X38.1 needle roller bearings	6804	20x32x7	20	32
25 mm x 42 mm x 32 mm INA NAO25X42X32-ZW-ASR1 needle roller bearings	6706ZZ	30x37x4	30	37
85 mm x 115 mm x 30 mm NSK NAF8511530 needle roller bearings	6802	15x24x5	15	24
NTN KBK10×14×12.5X1 needle roller bearings	6800-2RS	10x19x5	10	19
NTN KBK16×20×17 needle roller bearings	6806Z	30x42x7	30	42
JNS RNA 4911 needle roller bearings	6304DD	20x52x15	20	52