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
KBC K333722PCSP needle roller bearings	68/850	850x1030x82	850,000	1030,000
Timken B-45 needle roller bearings	6352-M	260x540x102	260	540
KOYO AX 12 170 215 needle roller bearings	6306-2RS	30x72x19	30	72
Timken K20X28X20H needle roller bearings	6800-2RS C3	10x19x5	10	19
NTN NK38/20R needle roller bearings	B25-139A-A-CG14	25x68x18	25	68
KOYO RFU313624A needle roller bearings	6800DD	10x19x5	10	19
32 mm x 47 mm x 20 mm INA NKI32/20-XL needle roller bearings	6426	130x340x78	130	340
28 mm x 45 mm x 17 mm INA NA49/28 needle roller bearings	633ZZ	3x13x5	3	13
42 mm x 52 mm x 30 mm ZEN NK42/30 needle roller bearings	6800ZZ	10x19x5	10	19
NSK FJ-810 needle roller bearings	NNCL4968CV	340x460x118	340	460
Timken AX 8 16 needle roller bearings	68/670	670x820x69	670,000	820,000
IKO BHA 1112 Z needle roller bearings	6305-2Z	25x62x17	25	62