# Parametric Linear Rack & Pinion .DXF + .STL CAD Studio

Generate conjugate involute pinion gears and linear trapezoidal racks with exact mm-per-revolution linear travel, thrust force, and CNC/3D-print exports.

## Engineering Geometry & Export Specification
- Computes linear travel pi*m*N1 per pinion revolution and generates zero-interference rack-and-pinion profiles for CNC routers and linear actuators.
- 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/rack-and-pinion-cad-generator.html