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
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