Extension spring for Garagedoor

we manufacture high-quality garage door extension springs that adhere to DASMA (Door & Access Systems Manufacturers Association) standards.

Key Features of Extension Springs

• We offer a variety of hook types for different installation needs, including double hooks and clip ends.
• Our standard Extension springs are designed with 25" lengths which can be extended up to 70".
• We manufacture extension springs with load capacity of 10 lbs to 300 lbs, and they are Colour Coded as per DASMA.

How Extension Springs Work

When a force is applied to the ends of an extension spring, the coils stretch out, causing the spring to extend. The amount of extension is determined by the spring's stiffness, which is measured in pounds per inch (lb/in) or newtons per meter (N/m).