Industrial Adjustable Stainless Steel Tension Spring Double Hook Micro

1. What are extension springs used for?
Applications for extension springs include automotive interiors and exteriors, garage door assemblies, vise-grip pliers, carburetors, trampolines, washing devices, farm machinery, toys as well as thousands of other uses.

2. Which is better torsion or extension springs?
Torsion springs tend to be stronger and more durable than extension springs. And though they are more expensive, they last longer, between 15,000 and 20,000 cycles as opposed to 10,000 cycles with extension springs. They also offer greater balance and show more control when moving, not jerking as the door moves.

3. What are the different types of spring?
Again, there are three classes of springs: linear (or constant rate) springs, variable rate springs, and constant force springs.

4. How long do extension springs last?
Extension Springs' Life Expectancy: Extension springs are installed at the side of the door and act extend, rather than contract (as does the torsion spring). They have 15,000 and 20,000 cycles which equate 7 – 12 years of life expectancy.