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The NEG'ATOR Constant Force Spring motor is a prestressed strip of spring material which is formed into a coil and stored on a small storage drum. The free end is then fastened to and backward wound onto a larger output drum-this is the "winding" portion of the Constant Force 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 torque of a NEG'ATOR Constant Force Spring motor is dependent on many factors including material width and thickness, the natural radius of curvature and the diameters of the drums. These motors, due to their high operating stress, provide many advantages in motor size and life cycle at a given load. Optimal applications would require fatigue life between 2,500 and 35,000 cycles.
The Constant Force Spring output and long defection capability of the NEG'ATOR power package provides a practical and economical alternatives to electric motors, dead weights and power springs. This Constant Force Spring can provide up to 100 turns with little effect on torque output. Hunter Spring's design engineers will assist you in designing a motor to meet your size, load and life cycle requirements. Our engineers can also suggest mounting arrangements and stopping devices which can help optimize the performance or your overall product design.
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