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
NBS NKIS 65 needle roller bearings	100 N/mm²	M 14x1.5	13 mm	330
KOYO DL 15 12 needle roller bearings	Pressed Steel	52100 Bearing Steel	Open	Double Row Non-Fill
Timken RNA2075 needle roller bearings	85mm	20.4	45mm	C3
INA NK12/12 needle roller bearings	172 mm	HM48T	23148, 22248	OH
45 mm x 68 mm x 40 mm KOYO NA6909 needle roller bearings	Two Metal Shields	--	Standard	Steel
NSK NSA02424 needle roller bearings	Needle Rollers	0.8750 in	0.6250 in	Hex
Timken NKS50 needle roller bearings	Open Type	55mm	100mm	55.9
KOYO NQ536825A needle roller bearings	Four-Bolt Piloted	Contact with Flinger	UCFC200	9750 kgf
20 mm x 37 mm x 32 mm JNS NAFW 203732 needle roller bearings	(2) Outer	64 mm	Uncoated	Brass
KOYO BK2012 needle roller bearings	4.0000 in	UC206-19MZ2	Tapped Base	3.3125 in
82,55 mm x 127 mm x 51,05 mm NTN MR648032+MI-526432 needle roller bearings	Four-Bolt Flange	Malleable Iron	1-57/64 in	Lubrication Fitting
Timken J-146 needle roller bearings	4-59/64 in	Set Screw	Side Mount	PBT Thermoplastic