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
IKO TAF 223020/SG needle roller bearings	672H	2x4x1.2	2	4
FBJ NK80/35 needle roller bearings	BB1B 363297	1125x970x75	1125	970
KOYO RNA3240 needle roller bearings	6824-2RS	120x150x16	120	150
NBS BK 3020 needle roller bearings	NU2211-E-M6	55x100x25	55	100
KOYO K22X26X18H needle roller bearings	6701LLF	12x18x4	12	18
KOYO NK10/16TN needle roller bearings	6802ZZ	15x24x5	15	24
KOYO BTM182520 needle roller bearings	635 ZZ	5x19x6	5	19
KOYO JH-1016 needle roller bearings	68/900	900x1090x85	900,000	1090,000
NTN K30X35X20 needle roller bearings	STF450KVS5901Eg	450x595x368	450	595
NTN KJ32X37X23.3 needle roller bearings	6800ZZ	10x19x5	10	19
KOYO FNT-821 needle roller bearings	6800DD	10x19x5	10	19
NTN DCL66 needle roller bearings	68/900	900x1090x85	900	1090