Engineering Plastics — Machining, Properties & Material Selection
Engineering Plastics — Machining, Properties & Material Selection
Engineering plastics guides for machinists, engineers and product designers. Machining parameters, material property comparisons, and selection data for Delrin, Nylon, PEEK, PTFE, UHMW, Polycarbonate, ABS, and glass-filled nylon.
ASA vs ABS: Material Properties, UV Resistance, and When to Use Each ASA and ABS share a similar backbone chemistry and nearly identical processing behavior, but one critical difference separates them: UV and weathering resistance. Choose ABS for indoor applications, consumer electronics, and structural prototypes where cost efficiency and initial impact strength are paramount. Choose […]
Laser Engraving ABS Plastic: Material Properties, Optimal Settings, and Trade-Offs ABS is a versatile engineering plastic for laser engraving it produces clean, contrast-rich marks with minimal residue compared to cutting the same material. However, ABS has specific engraving requirements: incorrect settings cause charring, surface stress cracking, or toxic fume output. This guide covers the material
3D Printing ABS for Prototyping: When to Move to Injection Molding or CNC FDM-printed ABS is not the same material as CNC-machined or injection-molded ABS, same resin, different mechanical behavior. If your prototype needs to validate more than fit and form printing it can quietly mislead you. This guide breaks down exactly where FDM ABS
Flame Retardant ABS: Properties, UL94 Ratings, and Trade-Offs Engineers Need to Know Standard ABS does not meet UL94 vertical burn requirements without a flame retardant (FR) additive package. If your part sits near a heat source, live electronics, or falls under a safety standard requiring a UL94 rating, you need FR ABS but the additive
Delrin vs Teflon: Friction, Strength, Temperature, and Machining Differences Quick Answer: When to Choose Delrin vs Teflon Choose Delrin (POM) if your application requires mechanical strength, rigidity, and precision. It is the industry standard for gears, high-load bearings, and parts that must hold tight tolerances. Choose Teflon (PTFE) if you need extreme heat resistance or chemical inertness. It is the superior choice
Delrin 3D Printing: Feasibility, Challenges, and Engineering Alternatives Can You 3D Print Delrin (POM)? Yes, but it is extremely challenging. Delrin can be FDM 3D printed using an all-metal hotend (210°C–225°C), a high-temperature bed (120°C–150°C), an actively heated chamber (60°C–80°C), and custom cellulose/PVA bed adhesion. Never exceed 230°C to avoid toxic formaldehyde gas release. Critical
Delrin (POM): Properties, Strength, Temperature, and Engineering Uses What Is Delrin (POM)? Delrin is the brand name for Polyoxymethylene (POM), specifically the acetal homopolymer version originally developed by DuPont. Often referred to as “plastic steel,” it is a high-performance, semi-crystalline engineering thermoplastic engineered to replace metal in precision mechanical applications. To understand why engineers prioritize Delrin (POM) over other polymers,
Delrin vs. Acetal: The Engineer’s Guide to Choosing the Right POM Delrin and Acetal are often treated as the same plastic, but they are not identical materials. Delrin is an acetal homopolymer (POM-H), while most materials sold as Acetal are copolymers (POM-C). This small molecular difference changes strength, chemical resistance, machining behavior, and reliability in
Laser Cut Delrin: Feasibility, Settings, Safety, and Best Practices Can Delrin Be Laser Cut? Yes, Delrin (Acetal/POM) is an optimal engineering plastic for CO2 laser cutting. It sublimates (vaporizes) cleanly, leaving a high-gloss, burr-free edge. However, the process releases Formaldehyde gas, making high-volume external ventilation non-negotiable for safety. Why Engineers Choose Laser Cutting for Delrin What Happens When You
Machining Delrin: Feeds, Speeds, Tooling & Tolerance Guide (2026) Delrin (Acetal Homopolymer) is the industry standard for high precision plastic machining due to its superior dimensional stability, low friction, and excellent chip formation. Unlike softer plastics (PTFE or UHMW), Delrin cuts cleanly without “gumming” when managed correctly. Quick Reference: Machining Snapshot Parameter Metric Target Value Imperial Target Value Surface