# Robotic Actuator 7:1 Epicyclic Planetary CAD Generator

Configure compact high-ratio 7:1 involute planetary stages (Zs=12, Zp=30, Zr=72) for quasi-direct-drive quadruped and humanoid robot actuators.

## Engineering Geometry & Export Specification
- Uses a 25° pressure angle to maximize root strength on compact 12-tooth sun inputs inside 80mm-class brushless robot 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/cycloidal-vs-involute-planetary-ratio-tool.html