Available in unalloyed steel. Minimum order value of $20. Shipping to the US only.

Extension Springs with Turnable Bolts

Experience the full potential of extension springs with our rotatable bolt design, keeping the resistance intact while eliminating the risk of breakage. Especially when connected to components with bolted ends, our extension springs make the perfect solution for maximum efficiency.

Secure Bolting for Peak Performance

Choose either our extension springs with turnable loops or the series of extension springs with rotatable tapered bolts. These convenient bolts can be directly threaded in a bore or fitted with an end mounting. Each design ensures the springs are connected securely and able to perform at their highest capability.

Expert Guidance for Your Spring Needs

As tension spring manufacturers, we take great pride in helping you select the ideal product for your specific application. You can trust our experienced team to guide you through the process easily.

Important Specifications:

• Number of Active Coils (T.C.)
• Spring Rate (R)
• Initial Force (F0)

Material and Performance Information

• EN 10270-1-SH

Maximum Load Length and Temperature

Recommended for static or pseudo-static loaded springs operating at temperatures up to 104°F (40°C), our extension springs achieve an optimal balance between longevity and performance. The power loss over time, or relaxation, remains within acceptable values for most applications. For higher operating temperatures or more than 10,000 cycles, refrain from loading the spring beyond the maximum load length (E.L.). Our EN 10270-1-SH material can safely withstand up to 248°F (120°C).

Calculating Spring Force

To determine the spring force at a specific length, multiply the travel distance (in millimeters) by the rate (R) and add the initial force (F0). Keep in mind 1 kp equals 9.80665 Newtons, and 1 Newton is equivalent to 0.10197 kp.

Your Partner in Spring Solutions

We stand ready to assist you in selecting the perfect extension spring and providing the information and guidance you require. Don't hesitate to reach out to our friendly team at +1 (860) 584-0594 or through our online form. We're committed to delivering exceptional results with the quality and professionalism you deserve.