Available in unalloyed steel and stainless steel. Minimum order value of £15+VAT. Shipping to the UK only.

Extension Springs with Loops

Our high-quality extension springs with loops can be used for a variety of both general and specific applications, including garage doors, washing devices, industrial machinery and automobiles. Our extension springs are manufactured in-house with full diameter loops.

These springs are closely coiled and resist pulling force in the direction of their length. The loops at either end allow the spring to be attached to components easily. When a force is applied, the spring exerts force to bring the coils back together (like on a trampoline, for example).

Contact Our Experienced Team Today

As tension spring manufacturers, we can advise you on the use or application of our products. If you need guidance, please don’t hesitate to contact us using our online form or directly by calling us on 01604 499332.

Legend:

TC = No of active coils
R = Spring Rate
F0 = Initial force in Newtons
F1 = Maximum Force

Max load length and temperature:

Unalloyed spring steel
EN 10270-1-SH

Maximum load length EL applies for static or pseudo static loaded springs operating at temperature up to about 40°C. The relaxation, i.e. the power loss over time, will then stay within acceptable values for most applications. At higher operating temperatures or dynamic life demands, more than 10,000 cycles, the spring should not be loaded as far as EL. Maximum permitted operating temperature of unalloyed spring steel EN10270-1-SH is about 120 °C.

Stainless spring steel:
EN 10270-3-1.4310

Maxnimum load length EL applies for static or pseudo static loaded springs operating at temperature up to about 150°C. Maximum permitted operating temperature of stainless spring steel EN10270-3-1.4310 is about 250 °C.

Length of loop is minimum 0.75 * ID

To calculate the spring force at a certain length, the travel in mm is multiplied by the rate (R) + the initial force (F0).

1 kp = 9.80665 Newtons, 1 Newton = 0.10197 kp