Constant Torque Springs

What a Constant Torque Spring Does

A constant torque strip spring is intended to provide a relatively uniform rotary output over a specified working range. In a common arrangement, the strip transfers between a storage spool and an output spool with reverse winding. The torque profile must be reviewed for the actual assembly.

This differs from a conventional power spring wound around an arbor inside a housing. A spiral appearance alone does not identify the spring type, and a near-constant torque requirement does not imply a perfectly flat curve at every angle.

Start with the Mechanism

For rotary return or reel applications, describe the motion that needs support and how the output is transmitted. Where a reel converts torque into cable pull, the effective winding radius matters. A constant torque spring does not by itself regulate speed, provide damping or lock a mechanism in position.

Information for a Custom Review

• The application and intended return or balancing action.
• The required torque behavior across the working rotation.
• Available assembly space, mounting arrangement and direction of rotation.
• Operating conditions and the sample evaluation you need.

Start with a non-confidential description. Detailed drawings and project-specific requirements can be shared through an agreed private channel.

Compare Related Spring Families

Constant force springs are a starting point for a near-constant linear pull. Power springs are used for rotational energy storage and return. Review the spring terminology guide when the names in a drawing or enquiry are ambiguous.

From Discussion to Sample Evaluation

These products are custom designs. Before accepting a spring for use, agree the relevant output checks, working range and durability assessment for the complete mechanism. Public application examples do not establish qualification for a regulated device or safety system.

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