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 BA 218 Z needle roller bearings	68/630	630x780x69	630,000	780,000
INA K115X123X27 needle roller bearings	61913-2RZ	90x65x13	90	65
NTN HL-NK35X68X20-1T#01 needle roller bearings	6702ZZ	15x21x4	15	21
Timken HK0408 needle roller bearings	68/850	850x1030x82	850,000	1030,000
IKO BHAM 208 needle roller bearings	6800-2RS	10x19x5	10	19
NBS K 25x29x13 needle roller bearings	6915Z	75x105x16	75	105
NSK FWF-162224 needle roller bearings	7318WN	90x190x43	90	190
Timken RNAO30X42X16 needle roller bearings	62/32DDU	32x65x17	32	65
NSK MH-22121 needle roller bearings	639H	9x30x10	9	30
KOYO RNA3150 needle roller bearings	68/750	750x920x78	750,000	920,000
NSK FWF-404834 needle roller bearings	6801	12x21x5	12	21
22 mm x 39 mm x 17 mm INA NA49/22-XL needle roller bearings	6311 M	120x55x29	120	55