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
35 mm x 55 mm x 21 mm INA NA4907-2RSR needle roller bearings	6926	130x180x24	130	180
45 mm x 72 mm x 20 mm IKO NAF 457220 needle roller bearings	6705	25x32x4	25	32
KOYO BH-87 needle roller bearings	6802ZZ	15x24x5	15	24
FBJ K60X66X30 needle roller bearings	NJ332-E-M1 + HJ332-E	160x340x68	160	340
ZEN HK2012 needle roller bearings	68/710	710x870x74	710	870
KOYO MK681 needle roller bearings	M252300	M252330X	M252310	Imperial
Toyana NK110/30 needle roller bearings	F637ZZ	7x26x9	7	26
NSK M-851 needle roller bearings	7017 ACD/HCP4AH1	130x85x22	130	85
300 mm x 380 mm x 80 mm INA NA4860 needle roller bearings	6809-2RS	45x58x7	45	58
AST S45 needle roller bearings	6801	12x21x5	12	21
Timken BH-1614 needle roller bearings	6812NR	60x78x10	60	78
KOYO MK651 needle roller bearings	6411	55x140x33	55	140