# ISO 08B / DIN 8187 Metric Roller-Chain Sprocket .DXF/.STL

Generate European ISO 08B metric sprockets accounting for the critical 8.51mm roller diameter difference vs ANSI #40 (7.92mm) to prevent chain climb.

## Engineering Geometry & Export Specification
- Prevents premature wear caused by mixing 8.51mm ISO 08B rollers with 7.92mm ANSI #40 pockets.
- 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/iso-08b-metric-roller-chain-sprocket-cad.html