Core Principle

A choice between "Cost," "Mechanical Performance," and "Temperature Resistance."

Nylon - Cost Leader

• Most cost-effective option
• Excellent toughness (impact resistance)
• Drawback: Absorbs moisture, causing dimensional instability

Delrin (POM/Acetal) - Best All-Around

• Best all-around performer for machined parts
• Good stiffness, low friction, dimensionally stable
• Easy to machine, excellent metal replacement
• Default choice for most plastic machined components

PEEK - High-Performance Champion

• Extremely high strength and temperature resistance (up to 250°C)
• Superior chemical resistance
• Cost: 10-20x more expensive than Delrin
• Use only for extreme applications