Scanning hardening is promptly simulated in just 1h for a splined shaft. Geometry imported from a CAD file is processed in less than 30 min. That combined with 1h long calculation allows to find the best parameters for optimal hardening of the splined shaft. The shaft with 18 splines was simplified cutting a half-spline slice. Symmetry boundary conditions at the cut surfaces represents the full shaft. Since the scanning case has showering next to the coil, we split the surfa