Calculating Screw Thread Properties Easily
Filed in Uncategorized on April 28, 2011 with no comments
For calculating screw thread properties easily, for screw threads with a 60 degree included angle thread shape, use the formulas below:
Metric screw sizes are calculated as follows:
- Minor diameter = Major diameter – (1.226869 x pitch)
- Pitch diameter = Major diameter – (.649519 x pitch)
- The tensile stress area = ((root dia + pitch dia) / 2)^2 * Pi/4
Inch screw sizes are calculated as follows:
- Minor diameter = Major diameter – (1.299038 x pitch)
- Pitch diameter = Major diameter – (.649519 x pitch)
- The tensile stress area = ((minor diameter + pitch diameter) / 2)^2 * Pi/4
Of course, you can download DZynSource Mold Engineering Software and not have to do these calculations yourself!