Spring pins for better tolerance and usage

Spring pins are smaller in size but their application and usages are very big. Without these miraculous devices many industrial applications are of no use. Spring pin is a kind of cylindrical mechanical fastener that secures two or more parts of machine related to each other. Spring pins have a relatively large diameter of the hole. With exert of pressure, spring retains itself in the hole and that is the reason for which it is also called a self retaining fastener. Spring can be used in compressed form or it can be expanded according to the need of customers and machinery to be joined. It is ideal to reduce vibration and to reduce the direct pressure on machinery parts.

Cylindrical or tabular spring pins are formed when flat strip of high carbon steel or heat treatable stainless steel is continuously roll formed. When pin is formed, it is deburred to remove sharp edges and then it is hardened to use.

Spring can also be classified into Coiled and slotted spring pins. 

• Coiled pins are also known as spiral pins and are typical pins of cylindrical shape. These are used in automatic door handles, cosmetics cases, locks and latches. They are also used as the device to remove motherboards from PCs and have industrial use like pumps, circuit breakers, steering boxes and columns.
• Slotted Spring Pins are also known as “C” pins as these have slots in their cylindrical shape to allow the pin to have some flexibility during insertion. 

These spring pins are used for a number of applications such as to prevent shaft rotation, T-handle, Cotter pins, hinge in light gauge metal, dowel application, stop pins and knob-to-shaft. Other high end applications of spring pins include AC motors, die cast rotors, mining, agricultural equipments and in hardware.