Torsion and Extension Springs
There are significant similarities and differences between a torsion and extension spring for garage doors. It all depends on the type of function that they are supposed to perform as well as the overall setup on the property. Normally torsion springs are preferred because they excel in heavy duty work and the most common usage of the two. However, if you have a very low head room then it is advisable to try the extension springs.
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Another exception to the rule is if it's difficult to use the rear torsion spring for standard functionality. The advantage of torsion over extension is the fact that the former is not fully extended during operation and that adds convenience for the user. Although torsion springs can cost more than their extension counterparts, they last longer, running up to 20,000 cycles. The torsion springs hardly make half that figure. Torsion springs are also known for allowing better control of motion.