Galvanized Torsion Springs

Most homeowners have garage doors operating with galvanized torsion springs. These pieces of hardware are the most widely used for residential applications. They are made to perform properly for longer.

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These components are made from galvanized steel. The galvanization process involves dipping the steel wire into molten zinc. In this way, the wire receives zinc coating which acts as a barrier to the damaging effects of air and moisture. It works to reduce the risk of rusting to the very possible minimum. When this kind of protection is paired with the strength of steel, the springs become much more reliable and durable. 

It is common for a residential overhead door to use a single torsion spring. It typically goes over the central part of a shaft fixed above the door along its length. At each end of the shaft, there is a drum with a lift cable attached to it. The other end of the lift cable is attached to the bottom of the door. The spring is loaded with force matching the weight of the door. A balance is created and the unit stays in place when in closed position. During opening, force is released from the spring and enables the lifting of the unit. During closing, the spring gets loaded again.

It is possible for some harsh chemicals to damage the zinc coating, but given that the spring is set high above the ground it cannot be reached by potentially dangerous compounds such as driveway cleaners and road salts. Still, the component has to be lubricated at least once a year. All coils have to be covered with the lubricant in order for the spring to operate smoothly and make a minimal amount of noise during movement.

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