Lee Spring – constant force – constant load
Motor springs are used for cable retraction, power generation etc. Power springs are used for retracting applications such as seat belt webbing, tape measures and dog leads, seat recliner, window regulator mechanisms etc.
Where higher loads are encountered then multiple mounting can be used to increase force. Constant force springs mounted back-to-back make the sum of their forces available at one point. This method also provides stable extension over long deflections. Tandem mounting makes the sum of two spring forces available at a single point while pulley mounting doubles the force of a single constant force spring. Laminar mounting, inter-winding of two or more springs as an assembly, offers the sum of their forces in a minimum of space.
Fatigue life of ex-stock constant force springs ranges from 2,500 cycles to 25,000 cycles depending upon the load and size of the spring. Working deflections up to 42 inches can be achieved and these springs are much easier to handle than a conventional wire spring.
Further information on constant force springs from Lee Spring can be found at www.leespring.com/int_learn_constant_force_springs.asp or follow them on twitter - https://twitter.com/leespringuk.
Lee Spring is the UK supplier of choice for catalogued and custom springs, including compression springs, torsion springs, constant force springs, die springs, belleville spring washers, wave springs, extension springs, battery springs and numerous speciality springs. Materials include steel, stainless steel, cobalt/nickel alloy, bronze, brass, music wire and composite plastics.
In addition, Lee Spring offer extensive custom design and manufacture services for one-off/prototypes or ongoing production requirements.
Lee Spring Ltd
Tel: 0118 978 1800
Press contact: Christopher Petts
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