Spring Pin

A spring pin (also known as a roll pin or tension pin) is a cylindrical, hollow, and flexible mechanical fastener used to secure the position of two or more parts. It is designed to be compressed when inserted into a hole, creating a tight fit due to its spring tension.

Spring Pin

Features of a Spring Pin

Features of a Spring Pin

  • Material: Typically made from high-carbon steel, stainless steel, or alloy steel for durability and resistance to wear.
  • Design: Hollow, with a longitudinal slit running along its length. Slightly larger in diameter than the hole it’s intended for, which allows it to compress when inserted. Available in metric and imperial sizes.
  • Shape:
    • Cylindrical: Most common. Chamfered edges for easy insertion.

Types of Spring Pins

Types of Spring Pins

  • A single longitudinal slit along the length of the pin.
  • The most common type, providing a reliable fit.
  • Designed for higher loads and used in industrial or heavy machinery.

Applications of Spring Pins

Applications of Spring Pins

  • Automotive: Securing components like hinges, levers, and linkages.
  • Machinery: Used in shafts, gears, and pulleys to prevent axial movement.

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