IMPORTANCE OF THE HELIX ANGLE IN COMPRESSION SPRING DESIGN.

In an effort to assist spring design engineers to product cost effective, quality springs that are safely stressed, Wisconsin Coil Spring, Inc. has developed a means of quickly checking the helix angle of a spring design against what could be considered an ideal helix angle. This helix angle ratio or Xq, as it is referred to in this article, is based on the formula . 41nD plus 1 one-half d, where 'n' is the number of active coils, 'd' is the wire size, and 'D' is the mean diameter of the spring. Refs.