Needle roller bearings

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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
NSK MFJL-2215L needle roller bearings	6816Z	80x100x10	80	100
Toyana K17x22x20 needle roller bearings	68/710	710x870x74	710	870
AST NK105/26 needle roller bearings	NN4921C1NAP4	105x145x40	105	145
JNS RNA 4913 needle roller bearings	68/800	800x980x82	800	980
NTN RNA4913S needle roller bearings	6804-2RZ	20x32x7	20	32
KOYO MK781 needle roller bearings	AXW 15 + AXK 1528	31x15x2	31	15
KOYO RNA3070 needle roller bearings	6801	12x21x5	12	21
50 mm x 62 mm x 35 mm ZEN NK50/35 needle roller bearings	6709ZZ	45x55x6	45	55
KOYO K38X50X40FH needle roller bearings	NNU6015 V	75x115x71	75	115
NTN PK38×47×19.8X1 needle roller bearings	675ZZ	5x8x2.5	5	8
Timken M-1481 needle roller bearings	HM807044/10	49.212x104.775x36.512	49,212	104,775
NTN DCL108 needle roller bearings	679	9x14x3	9	14