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
Timken HJ-263516 needle roller bearings	63/28	28x68x18	28	68
IKO BAM 138 needle roller bearings	UCFE201	12	12 mm	19 mm
NBS AXK 3047 needle roller bearings	HK2512	25x32x12	25	32
Timken RNA4920 needle roller bearings	6804LU	20x32x7	20,000	32,000
NTN PK21.6X29.6X15.8 needle roller bearings	6804N	20x32x7	20	32
NTN NK14/16R needle roller bearings	6410N	50x130x31	50	130
KOYO RNA1030 needle roller bearings	6826LLB	130x165x18	130,000	165,000
KOYO JT-56 needle roller bearings	68/850	850x1030x82	850	1030
NTN NK20X32X14 needle roller bearings	6818VV	90x115x13	90	115
INA F-65477.01.BCH needle roller bearings	68/600	600x730x60	600	730
NTN KJ44X50X27.8 needle roller bearings	6318	90x190x43	90	190
KOYO AR 5 12 26 needle roller bearings	676A	6x10x2.5	6	10