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
NBS NK 20/16 needle roller bearings	6800	10x19x5	10	19
AST SCE2012 needle roller bearings	ML71907CVDUJ74S	35x55x20	35	55
KOYO MK2281 needle roller bearings	1.378 in	Cylindrical bore	Ball Bearing	Bearing Steel
IKO RNA 493 needle roller bearings	AB12831	40x68x15	40	68
10 mm x 26 mm x 12 mm JNS NAF 102612 needle roller bearings	6408 NR	40x110x27	40	110
NSK RNAF405520 needle roller bearings	6409N	45x120x29	45	120
130 mm x 170 mm x 34 mm KOYO NA2130 needle roller bearings	672HZZ	2x4x2	2	4
KOYO BK2216 needle roller bearings	6802ZZE	15x24x5	15	24
KOYO 12MM1812 needle roller bearings	673SSA	3x6x2.5	3	6
INA NCS3624 needle roller bearings	68/800	800x980x82	800	980
Timken RNA6902 needle roller bearings	675ZZ	5x8x2.5	5	8
IKO TA 7040 Z needle roller bearings	5S-7008UADG/GNP42	40x68x15	40	68