A truly useful Excel tool has a second worksheet that converts the spline data into G-code or a parametric macro ( #1=Z... ) for a gear hobbing machine or wire EDM.
Sample Excel formula examples (assuming named cells: m, z, alpha, d_input): din 5480 spline calculator excel
Before diving into the mathematics, it is important to understand why Excel remains a preferred tool for this task: A truly useful Excel tool has a second