John Evans’ Sons, is the international leader in design and manufacturing of constant force springs, constant force spring assemblies and pusher springs (variable force). If your application is to counterbalance or to obtain a large amount of torque through a small amount of rotation, our custom spiral torsion springs are well suited.

Our vibration isolators are for the ultimate shock and vibration protection. Helical Mounts (aka Cable Mounts) provide 3 axis protection in any environmental conditions. Custom design, in-house tooling and precision manufacturing, combined with a wide and varied stock spring selection allows us to serve a wide variety of applications from military to medical, high-tech and aerospace. We provide impeccable service from start to finish and set the standard for world-class precision spring products.