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A manufacturer of linear and rotary actuators came to Helical in 1975 looking for a spring element to project the puck of a disc brake. Their actuators are driven by electric motors which, when turned off, need to stop immediately. Minimal over-run was desired. To control over-run, an electric disc brake was adopted which is not common in the industry. Somewhat like truck air brakes, the actuator brake is always on and is released by an armature drawing the puck away from the disc. The spring had to be made of electron beam weldable material (the spring would be welded in place), have specific rate and force, be lightweight and distribute forces uniformly across the spring ends.
Helical's machined, square ended springs were a
perfect fit. We decided upon a thin walled, 1 1/2 coil, single start spring from 17-4pH
corrosion resistant steel (CRES).
This solution worked so well that through the years 37 additional single and double start
springs have been added. The ability to change size and performance, yet retain the basic
configuration, has made this application one that continues to grow.
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901 W.
McCoy Lane · P.O. Box 1069 · Santa Maria, CA 93456-1069 Phone: 805-928-3851 · Fax: 805-928-2369 sales@heli-cal.com · engineering@heli-cal.com |
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Copyright © 1997-2007 Helical Products Company, Inc. -- All rights reserved. |
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We
manufacture single piece 
