# Positive Profile-Shift (+x) High-Strength Pinion .DXF/.STL

Eliminate involute root undercutting on small 9T–16T pinions using ISO positive profile shift (+x) with exact operating center distance calculation.

## Engineering Geometry & Export Specification
- Applies x_min = 1 - N*sin^2(alpha)/2 to thicken the pinion root and boost Lewis bending strength on compact high-ratio reductions.
- CAD Outputs: 0.005mm AutoCAD R12 `.DXF`, `.SVG`, Watertight 3D Binary `.STL` (4–40mm face + hub boss + bore), and `1:1` Printable `.PDF`.
- Pricing: Free Spec Proof PDF ($0) · Single CAD Pack ($11.90) · Mechanical Engineer Pro ($19.00/mo).
- Live Interactive Workbench: https://gearcadpro.com/templates/profile-shifted-undercut-free-pinion-cad.html