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
KOYO TVK6378L needle roller bearings	7230DT	150x270x45	150	270
Toyana K47x55x26 needle roller bearings	6410	50x130x31	50	130
KOYO RE222725AL1 needle roller bearings	6818-2RD	90x115x13	90	115
NTN AXK1109 needle roller bearings	4-3/16 in	Aluminium Triple Labyrinth	Split Cylindrical Retained Type	Two-Bolt Plummer Block
NTN 8E-NK1-25X52.2X1#04 needle roller bearings	6334-M	170x360x72	170	360
KOYO BHTM3530 needle roller bearings	6817NR	85x110x13	85	110
NTN BK1812 needle roller bearings	62207-2RS	35x72x23	35	72
Timken RNA69/32 needle roller bearings	677	7x11x2.5	7	11
KOYO M12121 needle roller bearings	6802DD	15x24x5	15	24
NSK RLM3830 needle roller bearings	63801 ZZ	12x21x7	12	21
50 mm x 68 mm x 25 mm KOYO NQI50/25 needle roller bearings	679	9x14x3	9	14
ZEN HK1712 needle roller bearings	6800	10x19x5	10	19