Spring pins, also known as tension pins or roll pins, are versatile and reliable mechanical fasteners that have been used in many industries for over a century. These pins are commonly used in situations where two or more parts of a machine need to be secured relative to each other with sufficient strength and stability.
Function:
Spring pins have a unique construction that makes them highly effective in securing machine components. These fasteners have a larger body diameter than the hole diameter, and they feature chamfer on either one or both ends that makes it easy to start the pin into the hole.
The spring action of the pin allows it to compress easily as it enters the hole, and then expand to assume the diameter of the hole. This creates a secure fit and a firm grip that keeps the parts locked in place. The force exerted by the pin against the hole wall retains it in the hole, and this is what makes spring pins self-retaining fasteners.
Applications:
Spring pins have been used widely across several industries such as automotive, aerospace, machinery, and construction. These pins are commonly used in applications that require a low-profile fastener, where the fastener needs to be concealed or where access to the back of the fastener is limited.
One of the primary uses of spring pins is in the automotive industry. They are used to secure brake and clutch components, fuel injectors, and other engine parts. They are also commonly used in the aerospace industry to secure aerodynamic surfaces, attach wing skins, and fasten flight controls.
In the construction industry, spring pins are used to secure heavy-duty machinery such as cranes, bulldozers, and excavators. They are also used in mining equipment and oil rigs. In the rail industry, spring pins are used to fasten railways tracks and components securely.
Conclusion:
Spring pins play an essential role in securing machine components of different industries. Their ability to compress and expand upon entering the hole, along with their self-retaining feature, makes them unique and versatile fasteners. They are widely used across the world and have proven to be reliable and durable. If you have a need for a low profile or an efficient fastener, perhaps it’s time to consider Spring Pins as a part of your solution.