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
NTN ARXJ22.2X42.3X3.8 needle roller bearings	6972/4795	360x479.500x56	360,000	479,500
Timken RNA2020 needle roller bearings	51309	45x85x28	45	85
NTN RNA4924 needle roller bearings	6312ZZ	60x130x31	60	130
50 mm x 72 mm x 22 mm INA NA4910-XL needle roller bearings	6802-2RU	15x24x5	15	24
35 mm x 50 mm x 30 mm ISO NKI35/30 needle roller bearings	68/630	630x780x69	630	780
JNS RNA 5911 needle roller bearings	68/710	710x870x74	710	870
AST NK18/20 needle roller bearings	65TM02A	65x100x17	65	100
KOYO RNA2190 needle roller bearings	4T-430209	45x85x47	45	85
KOYO BTM5030 needle roller bearings	160000	EE161394	161900	Imperial
NSK M-11101 needle roller bearings	68/750	750x920x78	750	920
SKF NK60/35 needle roller bearings	Mounted Bearing	22211	50 mm	Metric
JNS NK73/35 needle roller bearings	NNU41/500-M	500x830x325	500	830