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Spring Loaded Plunger showing internal compression spring

Adding Value to a Spring Through Encapsulation

A Spring-Loaded Device (SLD) or Enhanced Spring is a device that adds value to a spring by encapsulating it in a body and providing a plunger tip or ball on one end—enabling accurate and repeatable end forces.

Not a bolt or a screw, a spring-loaded device should not be subjected to the same installation or fastening forces common with bolts and screws. An SLD does not have the head size of a screw or bolt and it has a (hollow) threaded or push-fit style body in order to encapsulate a spring.

Vlier highly recommends that you read the SLD Installation section before designing SLDs into your product or fixture.

Vlier spring-loaded devices fall into four main categories:

  • Standard Spring Plungers Stubby Spring Plungers Ball Plungers
  • Quick Release Plungers
WHY USE A SPRING-LOADED DEVICE

Manufacturers choose spring-loaded devices over standard springs and self-manufactured parts for many reasons. The most common reasons are:
  • Accurate, repeatable end forces Easier side loading (impossible for springs) Simpler to install than standard springs One subassembly replaces multiple components Repeatable projection time after time
  • Minimal spring compression set

 

Learn More About Spring Loaded Devices
What is SLD? Selection Guide SLD Basics Materials Locking Elements Detents/Hole Diameter Installation

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