Machining Delrin & Acetal on CNC: Tight Tolerances with Zero Burr Formation

Why Delrin (POM) is the Machinist's Favorite Plastic

Unlike nylon or polyethylene, Delrin possesses excellent rigidity, low moisture absorption, and remarkable dimensional stability under tight machining tolerances (±0.02mm).

Machining Recommendations

• Tool Geometry: Single Flute or 2-Flute Upcut with polished flutes.
• Spindle RPM: 16,000 – 20,000 RPM.
• Feed Rate: 2,000 – 3,500 mm/min.
• Heat Control: High feed rates prevent heat buildup, ensuring chips exit as clean flakes rather than stringy webs.