Providing the correct torsion or extension spring for your application is our most important offering. From standard springs to hard-to-find replacement springs, ISC promises the right spring for your application. Let us match your requirements to the correct ISC solution. The guidelines below help identify the right spring, every time... Easy as 1, 2, 3, 4.
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Look at the end of the spring to determine the wind direction. If the end of the spring points in the clockwise direction it is a left wound spring. |
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Measure the length, in inches, of ten or twenty coils of the spring to be replaced. Then compare that measurement to our chart to determine the correct wire size. If you do not have a spring to measure from, contact us with your door weight, height, and width information ready. |
| Download enlarged list of wire sizes in PDF format | |
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For torsion springs, measure the inside diameter of the spring to nearest thousandth of an inch. For extension springs, measure the outside diameter. |
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Use a tape measure to measure the length of the spring to the nearest quarter of an inch. |
| Download enlarged visual aid in PDF format | |
Common Torsion Spring ID Chart
Color Codes - Torsion Springs
Color Definitions
Spring Ends
Extension Spring Sizing Chart
Color Codes - Extension Springs
