Delrin is one of the best plastics for CNC milling, producing clean chips and excellent surface finishes. Its high stiffness allows tight tolerances to be held reliably.
| Parameter | Value |
|---|---|
| Achievable Tolerances | ±0.02 mm (±0.001") |
| Surface Finish | Ra 0.4-1.6 μm |
| Cutting Speed | 150-400 m/min (SFM 500-1300) |
| Feed Rate | 0.08-0.20 mm/tooth |
| Tooling Recommendations | Sharp uncoated carbide, 2 flutes with high helix for chip evacuation. O-flute end mills for fine finish. |
High speeds and feeds for clean chip formation
Use sharp tools to prevent melting
Air cooling is usually sufficient
Avoid heavy depths of cut on thin walls
Allow material to stabilize at room temp before final cuts
Gears and sprockets
Bearing bushings
Conveyor guides
Pump impellers
Precision spacers
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