A device, often software-based, that determines the stiffness of a helical spring. This stiffness, generally expressed in force per unit of displacement (e.g., pounds per inch or Newtons per millimeter), dictates how much force the spring exerts for each increment of compression or extension. For example, a spring with a rate of 100 lbs/inch will require 100 pounds of force to compress it one inch.
Determining this spring characteristic is vital in mechanical design across various industries. Accurate prediction of this value ensures components function as intended within designed load limits and performance criteria. Historically, these calculations were performed manually using complex formulas. The introduction of computerized tools has significantly improved the speed and accuracy of these assessments, facilitating more optimized designs and reducing the potential for errors.