Flat Strip Metal Springs Are Different From Both Helical and Torsional Springs

Flat strip metal springs are significantly different from both helical and torsional springs. These springs are usually made from a flat or curved piece of flat steel, wound in a coil. They are unique because they have a nearly constant force regardless of the displacement of the spring in the designed operating range. Such springs are often useful for storing energy, since the force is essentially constant. Flat springs are typically stamped from materials such as cold-rolled steel, spring steel, stainless steel, aluminum, phosphor bronze, beryllium, and copper. Applications include electric, electronic, medical, automotive, aerospace, computer, and industrial. The most common example of these types of spring are tape measures. Source:metalsprings.com