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