Precision Machining
- CNC Machining Service
- CNC Milling
- CNC Turning
- Automatic Turning
- Machining Screw/Rivet
- Wire EDM Machining
- Casting & CNC
- Aluminum Profile & CNC
- Cold Heading & CNC
LML Metal Products Ltd.No. D309, Yunchuang E Valley, No. 3 Huanshi West Road, Tangxia Town, Dongguan City, Guangdong,China
(86) 17833674102dlynn9527@gmail.com
Materials
CNC Machining in POM(Derlin/Acetal)
High strength and toughness, fatigue resistant. Alloy steels incorporate additional alloying elements beyond carbon, leading to heightened hardness, toughness, fatigue resistance, and wear resistance
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Home / POM Delrin Acetal
POM(Derlin/Acetal)
Designers and engineers frequently choose POM(Derlin/Acetal) for CNC machining and CNC milling parts. Makes sense. This all-purpose metal has been proven to offer:
- * Excellent machinability
- * High strength
- * Hardness
- * Heat tolerance
- * Corrosion resistance
- * Electrical conductivity
- * Low weight
- * Low cost
- * Overall versatility
Description
- Applications
- Precision gears, bearings, medical inhalers, automotive fuel systems, zippers, fasteners, electrical connectors
- Strengths
- Lowest friction coefficient among engineering plastics, Exceptional dimensional stability (<0.1% moisture absorption), High stiffness/creep resistance, Excellent chemical resistance (solvents, hydrocarbons)
- Weaknesses
- Poor resistance to strong acids/oxidizers, Limited UV stability (requires additives), Notch sensitivity (crack propagation risk)
- Process compatibility
- Injection molding (primary), CNC machining, extrusion, laser cutting
- Surface Treatment
- Chrome plating, painting, plasma etching, printed labeling
Characteristics
- Price
- $3-6/kg ✦ 25-40% cheaper than nylon
- Lead Time
- 7-10 days (molding) / <5 days (machining)
- Wall Thickness
- 0.5-1.5mm (min/max for precision molding)
- Tolerances
- ±0.1mm (±0.004") molding / ±0.05mm (±0.002") machining
- Max part size
- 400 x 400 x 300 mm (molded) / 500 x 500 x 500 mm (CNC machining)
POM(Delrin/Acetal)
| Grade & Composition | Key Characteristics | Primary Applications |
|---|---|---|
| Homopolymer (Delrin®) (e.g., Delrin 100) | • Density: 1.41-1.42 g/cm³ • Tensile strength: 70-75 MPa • HDT @0.45 MPa: 160°C • Low friction (μ=0.15-0.25) | • Precision gears • Bearings & bushings • Snap-fit components |
| Copolymer (Acetal) (e.g., Celcon M90) | • Density: 1.40-1.41 g/cm³ • Tensile strength: 60-65 MPa • HDT @0.45 MPa: 155°C • Better chemical resistance | • Chemical valves • Fuel system components • Medical devices |
| 25% Glass Fiber Reinforced (e.g., Delrin 570) | • Density: 1.58-1.62 g/cm³ • Tensile strength: 110-120 MPa • HDT @0.45 MPa: 165°C • Reduced creep deformation | • Automotive components • High-load bearings • Structural parts |
| PTFE Lubricated Grade (15-20% PTFE) | • Ultra-low friction (μ=0.05-0.15) • Superior wear resistance • Service temp: -40°C to 100°C | • Self-lubricating bearings • Seals & gaskets • Slide mechanisms |
| Property | Test Standard | Homopolymer | Copolymer | 25% GF |
|---|---|---|---|---|
| Tensile Strength | ISO 527 | 70-75 MPa | 60-65 MPa | 110-120 MPa |
| Flexural Modulus | ISO 178 | 2.8-3.0 GPa | 2.5-2.8 GPa | 7.0-7.5 GPa |
| HDT @0.45 MPa | ISO 75 | 160°C | 155°C | 165°C |
| Impact Strength | ISO 179 | 90-100 kJ/m² | 80-90 kJ/m² | 45-55 kJ/m² |
| Coefficient of Friction | ASTM D1894 | 0.15-0.25 | 0.18-0.28 | 0.20-0.30 |
| Water Absorption (24h) | ISO 62 | 0.2-0.3% (all grades) | ||
Critical Processing Requirements
•Drying: Mandatory at 80-110°C for 2-3 hours (moisture ≤0.2%) to prevent bubbling and surface defects
•Melt Temperature: 190-210°C (±5°C tolerance) - degradation occurs above 230°C
•Mold Temperature: 80-120°C for homopolymer, 80-110°C for copolymer
Automotive Applications
•Fuel Systems: Resistant to gasoline, diesel, and biofuels (service life 10+ years)
•Window Mechanisms: Low friction and high wear resistance for regulator systems
•Engine Components: Under-hood parts withstand continuous 120°C operation
Chemical Resistance
•Solvent Resistance: Excellent resistance to hydrocarbons, alcohols, and ketones
•Acid/Alkali Resistance: Limited resistance to strong acids and bases
•UV Stability: Requires UV stabilizers for outdoor applications
Aluminum Alloys for Machining
LML offers several aluminum alloys in its long list of available manufacturing materials. Two of those alloys are especially well-suited material options for CNC machining, whether milling or turning: Aluminum 6061 and 7075.Aluminum 7075 T651 and T7: Benefits include high strength, hardness, low weight, corrosion resistance, and high heat tolerance. See data sheet for more information.Aluminum 2024 T3: This high-strength alloy offers a high strength-to-weight ratio and high corrosion resistance. See data sheet for more information.GET INSTANT QUOTE
Gallery of Anodized Parts Manufactured by LML
The color of anodized finishes may exhibit some degree of variation due to standard alloy tolerance differences. Please refer to the color scheme below to observe the range of available colors.
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Read more about quality assuranceFAQs
LML takes the stress out of manufacturing by guaranteeing the quality and consistency of every part. Each order is dimensionally and visually inspected by our in-house quality control team to make sure it meets the LML Standard. If you’re not satisfied with your order, we’ll remake your parts as fast as possible, free of charge, or refund you - whichever you prefer.
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LML Metal Products Ltd.No. D309, Yunchuang E Valley, No. 3 Huanshi West Road, Tangxia Town, Dongguan City, Guangdong,China
(86) 17833674102dlynn9527@gmail.com
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