Constant-Torque Clutch

The constant-torque clutch is a permanent-magnet hysteresis device that delivers smooth, repeatable torque across the full speed range — without external control or power, and with virtually no wear. It is widely used as a soft-start, an overload protector, and a precise tension-control element.

Headline features

1. Constant torque from zero to top speed. Solves nearly every tension-control problem.
2. Fast, repeatable torque setting. Set torque against a graduated scale, anywhere between minimum and maximum, and read it back at a glance.
3. No external control or power. Simple to install, maintenance-free, unaffected by voltage variation or power loss.
4. Robust performance. No friction-disc stick-slip or wear powder; smooth transitions between static and dynamic tension.
5. Flexible mounting. Hollow-shaft or solid-shaft variants, fixed-mount or pulley/adapter installation — easy to retrofit.