CNC technology to make a better spiral spring

William Hughes uses CNC technology to process spring hard wire into the required shape. The spring is then stress relieved and finished so the result is a spring that is faster to produce, has a lower cost, looks better and has better performance characteristics. Spiral springs – or clock springs as they are sometimes inaccurately known – are a type of torsion spring. The use of profiled or square wire, allows high performance parts to be engineered for applications in awkward or confined spaces. Typical applications include the electrical and automotive industries, for example seat folding mechanisms. The difference between a spiral spring and a clock spring is that a spiral spring has a few coils that don't touch each other generally delivering less than one full rotation whereas a clock spring has many coils, usually fitting into a confined casing.