Root undercutting occurs when z < 17 (α = 20°). Use positive profile shift (x > 0) to prevent it and strengthen the tooth root.
Profile shift does not change the pitch circle diameter — it redistributes tooth thickness between tip and root, affecting bending strength and wear resistance.
Full-precision SVG/DXF export. All gear profile intersection points preserved.
Involute + trochoid NURBS profile. True smooth curves — SPLINE entities in DXF.