Steel plunger
A steel plunger is the movable plunger of a Contact Probe that is made of steel. It transmits the Spring force to the contact tip and ensures that the Test Point, solder point, or contact point is mechanically and securely reached.
In Contact Probes, the steel plunger is particularly important for the mechanical stability and durability of the contact tip. Depending on the application, it must reliably withstand repeated contact cycles, friction, wear, and demanding surface conditions.
In Progressive Series Contact Probes, a steel plunger—combined with a Progressive coating, an appropriate Tip style, and increased spring preload —can help make the contact tip more resilient and support stable contact under difficult test conditions.
FAQ
It mechanically guides the contact tip, transmits the Contact force, and supports a defined movement during contact.
In the Progressive Series, the steel plunger, combined with a progressive coating, a suitable Tip style plating, and increased spring preload, can support durable contact.
The steel plunger helps ensure that the mechanical movement of the Contact Probe remains stable and repeatable over many contact cycles.
Further terms
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