Rod End & Spherical Bearings

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Rod End & Spherical Bearings

R.E. Purvis & Associates, Inc. is proud to partner with FK Bearings, a world-class manufacturer of rod ends and spherical bearings. We have the engineering capabilities to assist in identifying the perfect solution for your application.

Rod Ends

A rod end, also known as a rod end bearing or heim joint, is a mechanical articulating joint typically used on the ends of control rods, steering links, tie rods, or anywhere a precision articulating joint is required. It consists of:

  1. Ball: A spherical inner ring with a through-hole that provides the bearing surface.
  2. Race: An outer ring that encases the ball, allowing it to swivel and pivot within certain angles.
  3. Housing: Usually made of metal, it contains the race and has a threaded shank (male or female) to connect to rods or other parts.

Rod ends are used in applications requiring a flexible or rotating joint, such as in automotive, industrial machinery, and robotics. They help accommodate misalignments and angular motion between connected parts.

Spherical Bearings

A spherical bearing is a type of bearing designed to allow for rotational movement and angular misalignment between connected parts. It consists of an inner ring with a spherical convex outside surface and an outer ring with a correspondingly concave inside surface. This design enables the bearing to accommodate angular misalignment and rotational motion.

Key Features:
  1. Inner Ring: Contains the bore for mounting on a shaft and has a spherical outer surface.
  2. Outer Ring: Encases the inner ring and has a concave inner surface matching the inner ring's spherical surface.
  3. Seals or Shields: Often included to protect the bearing from contaminants and retain lubrication.
Types of Spherical Bearings:
  • Spherical Plain Bearings: Designed for heavy loads and large angular movements.
  • Spherical Roller Bearings: Contain barrel-shaped rollers between the inner and outer rings, suitable for high loads and misalignment.

Spherical bearings are crucial in applications where misalignment and rotational movement occur, providing durability and flexibility in mechanical systems.

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Additional Articles

How Rod Ends Are Used

Rod ends, also known as spherical bearings, are a type of mechanical joint used to connect two or more components that need to move relative to each other. They are commonly used in a wide range of industrial applications, including...

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