| Dimension | Formula | |-----------|---------| | Pitch diameter | ( d = m \cdot z ) | | Base diameter | ( d_b = m \cdot z \cdot \cos \alpha ) | | Tip diameter (max) | ( d_a = m \cdot (z+2) ) | | Root diameter (min) | ( d_f = m \cdot (z-2.5) ) |
To develop your calculator, you must integrate the following primary geometric formulas: Base Circle Diameter ( ): Addendum Modification ( din 5480 spline calculator excel