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Needle Roller Bearings

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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

Most rolling-element bearings are either ball or roller bearings. The roller bearing family consists basically of cylindrical, tapered, spherical, and needle bearings. Needle roller bearings are the smallest and lightest of the roller bearing family. That gives them specific advantages for certain applications, particularly those requiring reduced weight and space. The high roller length-to-diameter ratio helped give the bearings their name as well as their operating characteristics.

Types Of Needle Roller Bearings

  • Cup needle roller bearings.
  • Roller and cage assemblies.
  • Needle roller bearings with machined rings.
  • Single set of rollers within a cage.

Features And Benefits Of Needle Roller Bearings

  • The small rollers in needle roller bearings are highly effective at reducing the friction of a rotating surface. The bearing’s large surface area, which is in contact with the bearing raceway journals, creates a technical advantage, particularly for applications that require minimal space and weight. Needle roller bearings can handle relatively heavy loads for their diminutive design.
  • Their size also makes them more cost-effective compared to the alternatives in the extensive bearing catalogue. Needle roller bearings are also more compact in comparison, having a smaller difference between the diameter of the bearing and the diameter of the shaft.

Application And Uses Of Needle Roller Bearings

  • Needle roller bearings have been around for more than 60 years, but with the general move towards a reduction in weight, space and energy consumption, they’ve become the bearing of choice for many important applications.
  • Needle roller bearings are most commonly used in automobile, agricultural and construction components, including compressors, transmissions, gearboxes, pumps, torque converters, suspensions, U-joints and rocker-arm pivots. They’re also found in domestic appliances such as portable power tools, pump clutches and spindles.

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