What are Spring Plungers?

Spring plungers, also known as spring loaded devices (SLDs), are devices that enclose a spring within a threaded capsule. Tool engineers often place spring plungers in their tools in order to save on time and labor. Spring plungers serve this function because they guarantee positive and controlled spring tension when they are used in dies, fixtures, assemblies, and jigs. Spring plungers also provide accurate spring end force, which helps push through a ball or rounded nose within a tool or piece of equipment. This makes it possible for a tool or piece of equipment to perform more efficiently. Installing springs in devices can be difficult, because they easily spring out of shape. Spring plungers, on the other hand, make this job much easier, because the spring is encapsulated safely inside. Spring plungers are best installed with the help of a screwdriver, a hex key wrench, or a spring/ball plunger wrench. Although spring plungers are easier to install than bare springs, it is still ...  more

... Tool engineers often place spring plungers in their tools in order to save on time and labor. ... http://www.wisegeek.com/what-are-spring-plungers.  more