spring pin
Quick Summary
A spring pin is a type of fastener, typically made of steel, that is used to keep machine parts aligned or to fasten them together. It is a split tube with a diameter slightly larger than the hole it's inserted into. When driven into place, the pin compresses and exerts outward pressure, creating a frictional grip that locks it in position.1
These pins are reusable and are commonly used for securing lightly loaded pulleys and gears to shafts. They offer a reliable method for fastening components without significant loss of effectiveness over time.1
It's important to note that the term "spring pin" can also refer to a specific component in locomotives, an iron rod situated between springs and axle boxes that manages pressure on the axles.2
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