Hunter Spring

Constant Torque Springs (NEG’ATOR)

Key Features
– Long deflections at nearly constant torque. Positive or limited negative gradients can be achieved
– Minimal intercoil friction and resultant hysteresis as is common in power springs
– Provides rotary motion directly from output drum or linear displacement through the use of cable and spool

How it Works
The NEG'ATOR constant torque spring motor is a prestressed strip of spring material which is formed into a coil and is stored on a small storage drum.

The free end is then fastened and backwound onto a larger output drum; this is the "winding" portion of the constant torque spring's cycle.

When the output drum is released, the spring will return to the storage drum to assume its natural curvature thus rotating the output drum and providing virtually constant torque.

The Material
Hunter Spring constant torque springs are made of type 301 high-yield stainless steel and are supplied in coils for mounting on motor drums.

Standard or Custom Springs
We offer a wide range of standard constant torque springs. For further details, please click on our Standard Spring Design Guide for Constant Torque Springs.

We also offer constant torque springs as custom spring solutions to suit your specific needs. Use the constant torque spring design worksheet to specify your requirements and allow our Application Engineers to provide you with a design to meet your needs.

We invite you to consult us. We may well be able to formulate a custom solution that will surprise you with its efficiency and versatility.

Constant Torque Springs

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