# Mechanical Gear Ratio, Output Torque & Speed CAD Calculator

Calculate gear reduction ratio, output RPM, output shaft torque (N·m), center distance, and transverse contact ratio with live 60fps meshing gear visualization.

## Engineering Geometry & Export Specification
- Solves exact kinematic speed reduction, pitch-line velocity, and 98%-efficiency spur stage output torque alongside downloadable CAD geometry.
- 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/gear-ratio-torque-speed-calculator.html