A Coupling is a device used to Connect Two Shafts together at their ends for the purpose of transmitting power. The primary purpose of Couplings is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. A Coil Spring also known as a Helical Spring is a mechanical device which is typically used to store energy & subsequently release it, to Absorb Shock or to Maintain a Force between contacting surfaces. We offer all types of Springs & Spring Assembly.