How Does a Spring Pin Work?
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How Does a Spring Pin Work?

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How Does a Spring Pin Work?

Also known as a roll pin, a spring pin is a type of fastener that is used to connect two or more machine parts. Spring pins are hollow dowel pins manufactured from spring steel. They are called "spring pins" because they contain a spring that can expand when inserted. However, what makes spring pins puzzling is their size. They are wider than the hole in which they are inserted, making many people wonder how they work.


Mechanics of spring pins

Even if they are wider than the hole in which they are inserted, spring pins can work because they deform and then expand. They have at least one chamber, allowing them to enter the cargo hold. Once inside the hole, the spring pins expand, causing them to squeeze the inner wall of the hole. This compression will continue to occur until the spring pin reaches a hole of the same diameter.


Spring pin

Spring pin


Spring pins and split pins: what is the difference?

Although they are used to connect components, spring pins are not the same as split pins. The split pin is a simple metal fastener with two long metal pieces, which are deformed inserts. When the split pin is bent, it holds the components together. However, split pins usually do not return to their original shape—at least without human intervention.


Spring pins have existed for more than half a century. The world's first coiled spring was invented by German aviation mechanics and pilots, Herman Koehl in 1948. Since then, they have become commonly used mechanical speed boosters on heavy machinery, automobiles, airplanes and even household furniture.


Applications

Spring pins and spring pin fasteners are cost-effective industrial fasteners that require very little preparation. Usually, the user only needs to drill a hole before installation. Both coiled spring pins and slotted spring pins have a variety of applications. For example, electrical spring pins are sometimes used as electrical connectors.


Spring pin fasteners are suitable for casting, stamping and other production operations. Slotted spring pins are more resistant to shock and vibration than other products. Spring loaded pins may have a quick release mechanism, making them ideal for applications with limited space. For all types of spring pins and spring fasteners, bulk pricing is usually available. Spring pin suppliers are located in North America and all over the world.

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