# Sheet-Metal Frustum Cone Flat-Pattern Unfold .DXF Generator

Unfold truncated frustum cones, concentric reducers, and stainless hoppers into exact flat-pattern arc sectors with bump-forming lines in .DXF & 1:1 .PDF.

## Engineering Geometry & Export Specification
- Computes neutral-thickness slant radii R_out and R_in plus exact sector sweep angle theta = 360*(r2/R_out) with 12 bump-brake index lines.
- 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/flat-pattern-cone-layout-dxf-generator.html