What are Spring Pins

Spring pins are cylindrical fasteners designed to hold two or more parts together. They have chamfered ends while allowing for a spring-like action. Spring pins essentially have a large gap which allows them to deform under pressure.

Spring pins are often used to hold multiple parts together, with the parts facing each other. Spring pins can be inserted into holes that pass through the part. Once inserted, they hold the parts together while ensuring that the parts maintain their relative positions.

How Spring Pins Work

Spring pins work by filling the space of the hole they are placed in when trying to expand. They are called “spring pins” because they are rod-shaped pins that act like springs. They deform under pressure, during which the spring pins attempt to expand by releasing the mechanical energy of the pressure.

When the spring pin is placed in the hole, it expands. Spring pins are chamfered, which means their diameter changes from one end to the other. With its chamfered design, the spring pin will compress while filling the hole space. When doing so, the spring pin will exert a force against the inner wall of the hole.

There are two main types of spring pins:

Coil Spring Pin: The most common type of spring pin is coiled. Coiled spring pins are characterized by a coiled construction. Most of them are made of metal or metal alloys.

Slotted spring pins: Slotted spring pins are also available. Slotted spring pins are cylindrical pins with a slot in them.

After reading this article, you should have a deeper understanding of spring pins. They are fasteners that use a spring-like action to hold multiple parts together. The spring pins are chamfered so that they will try to expand when placed in the hole. While they are available in dozens of styles, most spring pins fall into one of two categories: coiled or slotted.