What's best for die springs: rectangular or round section wire?
Well, according to tests carried out by the Institute of Spring
Technology (IST), there's not much to pick between them, despite the
industry's long-held belief that the round section wire die spring is the
poor cousin of its rectangular wire counterpart. Not only do they perform
just as well as rectangular wire form dies springs, round wire die
springs also cost at least 20% less according to one of the UK's major
stockists, Lee Spring. These savings are possible because it is more
efficient to manufacture springs in round, rather than rectangular form
wire.
Lee Spring offers five types of die springs based on load performance.
All springs are shot peened for extended life and preset to prevent loss
of performance in use. They are supplied closed with ground ends to
provide large, squared-off bearing surfaces, and are epoxy coated in
various colour codes to identify load range and deflection.