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

Constant Torque Springs

Our High-Quality Constant Torque Springs

The reliable constant torque spring—or constant force spring—is made from pre-tensioned strip material, shaped into a tightly wound roll.

This spring is designed for linear movement and maintains nearly uniform force throughout its deflection. Maximum load is achieved after the spring is deflected to a length of 1.25 times its diameter, allowing it to generate constant force, irrespective of the extension length.

Fitting a Constant Torque Spring

Consistent torque springs offer versatile fitting options and can partially or fully extend. There's essentially no limit on extension speed or acceleration.

However, the spring requires lateral guidance during significant extensions to prevent sideways movement. An optimal clear space of 0.5–1.5 mm on each side is recommended.

If fitted on a bearing or conduit, the spring's own force can secure it, provided sufficient strip length remains on the bearing. We suggest using a screw or rivet to tether the spring's inner end in applications without a specific operating extension limit.

Fitting on a Bearing or Conduit

Our standard springs and slide bearings are typically supplied separately. The fitting process involves loosening the spring's outer end and winding it onto the bearing (if needed, secure it), following which the complete spring is wound onto the bearing.

If the spring goes directly onto a shaft, ensure the chosen shaft diameter allows enough play on the inner diameter, preventing the spring from sticking to the shaft.

Spring Life

The spring's lifespan is influenced by the ratio of its diameter to the material thickness (see relevant item information). The spring should be replaced once the recommended number of oscillations is reached for applications requiring numerous oscillations. Notably, the spring's lifespan is not time-dependent but predominantly influenced by the number of oscillations.

Standards for spring life:

• 15,000 oscillations

Conversion rate: 

1 kp = 9.80665 Newtons, 1 Newton = 0.10197 kp

Legend:

• T = Strip Thickness
• F = Spring Force in Newtons

Materials:

• Stainless steel - EN 10270-3-1.4310

We Are Here to Guide You

As manufacturers of constant torque springs, we're ideally positioned to advise you on their use or application and create one for your exact needs. Should you need our help, please get in touch with us via our online form or give us a call at +1 (860) 584-0594. Our experienced team is always ready to support you.