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What Is a Garter Spring?

A garter spring is a coiled helical spring connected end-to-end to form a circular loop. Its unique design allows it to apply uniform radial force, either inward (compression) or outward (extension). Because of this, garter springs are commonly used in sealing applications where consistent pressure is required around a circular surface, such as in oil seals, shaft seals, and fuel systems.

What Job Does a Garter Spring Perform?

The primary job of a garter spring is to maintain constant sealing pressure on elastomeric or polymer lips in dynamic and static seals.

  • Leak Prevention: Keeps lubricants, fuel, or fluids contained
  • Contaminant Protection: Blocks dust, dirt, and debris from entering sensitive systems
  • Durability: Maintains consistent force under varying temperatures, pressures, and rotational speeds
  • Reliability: Extends the service life of seals in demanding environments such as automotive, aerospace, and industrial machinery

In short, garter springs are the hidden force behind reliable seals, ensuring mechanical systems perform smoothly and efficiently.