Constant force springs / spiral springs / power springs are made of strip materials around to a flat spiral springs. Constant force springs have one end fixed and torqued at the other side when working. Bending cause elastic deformation which make springs rotate. It is used similar to torsion spring.

Capability of Constant force springs / spiral springs / power Springs:
Diameter 0.05mm – 10mm

Material of Constant force springs / spiral springs / power Springs:
Carbon steel, stainless steel, brass, aluminum, kovar alloy, zinc plated nickle plated steel and so on.

Application of Constant force springs / spiral springs / power Springs:
Generally used in tape, automobile starter motor, storage box and so on.