Roller Bearing

Definition - What does Roller Bearing mean?

A Roller Bearing is a type of bearing which uses rolling elements for supporting loads and reducing friction. It uses cylinders for maintaining the separation between moving parts of a bearing. When compared to the ball bearing, these bearings consist of barrel-shaped rolling elements rather than spherical balls. They can support heavier loads than ball bearings of similar sizes but cannot handle high speeds like ball bearings. They are self-aligned and handle mounting problems and shaft misalignment.

Petropedia explains Roller Bearing

Roller Bearings have outer and inner rings which contain bearing cage and rollers. The cage is also called separator or retainer that maintains spacing between the rollers and also holds the bearings together. A wide range of roller bearings are available each with distinct designs used in different applications. There are four major types of roller bearings:

  • Spherical roller bearings – They have two rings on the inner raceway that handle loads and misalignment concerns.
  • Cylindrical roller bearings – They handle low thrust and high radial loads at high speeds.
  • Needle roller bearings – They use long and thin cylindrical rollers for supporting radial loads.
  • Tapered roller bearings – They have tapered outer and inner rollers and raceways to accommodate the simultaneous thrust and radial loads.
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