Posts Tagged ‘needle roller bearings’

An Overview of Koyo Bearings Company

Friday, November 4th, 2016

In order to maximize your knowledge of bearings, I decided to spend a little time presenting some good information about some of the significant businesses in the market. The second in this series is Koyo Bearings. Koyo is the JTEKT Corporation brand for Bearings. (more…)

What Are Needle Roller Bearings?

Friday, April 15th, 2016

The roller bearing family consists of four basic types including tapered, cylindrical, spherical, and needle bearings.

In fact, needle roller bearings are the lightest and the smallest in the roller bearing family. This is why they have certain advantages for specific applications. Applications requiring reduced weight and space will benefit the most from these bearings.


About Needle Roller Bearings

Friday, May 31st, 2013

Needle roller bearings refer to bearings that make use of small cylindrical rollers. They help in reducing friction of a rotating surface. It is a roller bearing that has rollers that have length at least four times their diameter.

Needle bearings contain a large surface area which touches the bearing’s outer surfaces. More to these, there is less added clearance, which is difference between the diameter of the bearing and the shaft, hence their being more compact. The usual structure has the needle rollers themselves, a needle cage that positions and contains the needle rollers, and an outer race.

Thrust needle bearings are flat and make use of a radial pattern of needles. Radial needle bearings are cylindrical in shape and make use of rollers parallel to the axis of the shaft.

Full complement bearings contain solid inner and outer rings and rib-guided cylindrical rollers. Considering such bearings contain the biggest possible number of rolling elements, they have particularly high radial load carrying capacity. Also, they are ideal for mainly compact designs.

Needle bearings are largely utilized in engine components like rocker arm pivots, pumps, compressors, as well as transmissions. The drive shaft of a rear-wheel drive vehicle often consists of at least 8 needle bearings.

Needle bearings have a tinier cross-section, more load-carrying capacity, better rigidity, and less inertia forces that pave way for size and weight cutbacks in machinery. They are built to endure oscillation, run well even under extreme conditions, and interchange with sliding bearings.

Different types of needle bearings with a wide array of sizes and tolerances, for myriads of applications, are now available in the market. These include:

  • Needle roller and cage assemblies are available in single or double row, solid or split cage, metric and inch sizes, as well as in attaching rod bearings for special applications.
  • There are also single and double row bearings with or with no ribs, and with or with no inner rings.
  • Trust bearings are available in single row roller and cage assemblies.
  • Yoke and stud type track rollers are also offered.