Torsion common used in clothes pins, clipboards, torsion springs are used for hinges, counterbalances and lever return applications. electronic devices, to large torsion used in chair control units. Torsion springs perform best when supported by a rod or tube. The designer should consider the effects or friction and arm deflection on the torque.
Material: piano wire, stainless steel, high carbon steel, nickel plated, phosphorus bronze, copper bronze, beryllium copper.