Common features are listed at the bottom of the Home Page

Helical Torsion Springs can be designed for static or variable loads with the applicable text boxes becoming available for data input. For steady loads, one moment and a corresponding rotation are entered. For variable loads, two moments and the angle between them are entered — also a required life. Restrictions on coil diameter and a clearance between coils are optional inputs.
Pressing the Calculate button before all the required input values are entered will bring a message, or messages, requesting the missing information.

When the Calculate button on the Helical Torsion Spring Design form is pressed, if the spring index is high or low, or there is a chance of excessive stress, an information message or messages will appear and if it is thought necessary to edit the input, pressing the Review Input will return you to the Design data input screen. The instant interactive response between the two screens helps you to rapidly arrive at a satisfactory design.

If the Spring Analyzer button on the Helical Torsion Spring Design form is pressed, a new form, similar in layout but designed to accept the properties of an existing spring or spring design appears. Data entry consists of the spring mean diameter, the wire diameter, the free length and the number of active coils. Either a value for rotation, or a moment must be entered for steady loads and for variable loads a ratio between load positions must be entered. Again, pressing the Calculate button before all the required input values are entered will bring a message, or messages, requesting the missing information.

When the Calculate button on the Helical Torsion Spring Analysis form is pressed, if the spring index is high or low, or there is a chance of excessive stress, an information message or messages will appear and if it is thought necessary to edit the input, pressing the Review Input will return you to the Analysis data input screen. The instant interactive response between the two screens helps you to rapidly arrive at a satisfactory design.