How To Balance Strength and Flexibility of a Pinned Joint
The Coiled Spring Pin was invented by Herman Koehl in 1948. Easily recognized by its unique 2¼ coil cross section, Coiled Pins are retained by radial tension when installed into the host component, and they are the only pins with uniform strength and flexibility after insertion.
Coiled Spring Pins, commonly referred to as Roll Pins, are often used in applications traditionally assembled with Solid Pins. There is a common misconception that “Solid Pins are always stronger than Coiled Pins”. The fact is, the majority of the applications use low carbon steel Solid Pins and for those that use Coiled Pins, the most common is a heat treated high carbon steel, standard duty Coiled Pin.