Delrin® Plastic Machining

Delrin® 150 is an ideal material for parts that require high stiffness and dimensional stability, low friction, and good chemical resistance. Delrin® plastic also exhibits excellent wear properties in both wet and dry environments, making one of the more versatile engineering plastics available. This material offers excellent machinability, making it ideal for parts that require intricate geometries and/or tight tolerances. Upland Fab has been working with Delrin® acetal for decades. We have the skills and expertise to produce quality parts the first time—and every time!


Delrin Acetal Homopolyer vs. Acetal Copolymer

Delrin 150 is a homopolymer variation of acetal. Though similar in most aspects, both options do provide unique characteristics that may make them better suited to your specific application. Both “standard” acetal and Delrin acetal are available in a variety of grades, including FDA-approved grades for food-contact applications. Contact Upland Fab to discuss your material requirements.

  • Delrin acetal homopolymer exhibits higher strength at room temperature than acetal copolymer, in addition to greater toughness and stiffness.
  • Acetal copolymer (standard acetal) offers better overall performance in continuous high heat or hot water environments; it also has lower porosity than Delrin.


Industrial Uses for Delrin Materials

Due to Delrin’s many beneficial characteristics, it is an ideal solution for a variety of industrial manufacturing productions.

  • Medical: Due to Delrin’s high rigidity and ability to be sterilized, it is suitable for many medical applications. Delrin medical devices often include metered dose inhalers, auto-injector pens, tubing clamps, and more.
  • Defense: Plastic parts used in the defense industry must meet exacting specifications and regulatory guidelines, and Delrin is up to the task. It is commonly used to manufacture components for defense vehicle systems, chemical detection devices, sensor systems, and many other parts.
  • Semiconductor & Electronics: Semiconductors and electronic manufacturers require precision parts that meet tight tolerances. Delrin is a high-performance solution for producing electrical enclosures, connectors, and other insulating parts.
  • Aerospace: Delrin’s optimal performance in challenging environments makes it a good choice for aerospace assemblies. It is commonly used for aircraft systems and structural parts, landing gear, spacecraft components, and others.


Properties of Delrin Plastic

ASTM or UL test Property Acetal
Delrin ®
Delrin ® AF
D792 Density (lb/in³)
D570 Water Absorption, 24 hrs (%) 0.2 0.2 0.2
D638 Tensile Strength (psi) 9,500 11,000 8,000
D638 Tensile Modulus (psi) 400,000 450,000 435,000
D638 Tensile Elongation at Break (%) 30 30 15
D790 Flexural Strength (psi) 12,000 13,000 12,000
D790 Flexural Modulus (psi) 400,000 450,000 435,000
D695 Compressive Strength (psi) 15,000 16,000 16,000
D695 Compressive Modulus (psi) 400,000 450,000 350,000
D785 Hardness, Rockwell M88 / R120 M89 / R122 M85 / R115
D256 IZOD Impact Notched (ft-lb/in) 1.0 1.0 0.7
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
5.40 4.70 5.00
D648 Heat Deflection Temp (°F / °C)
at 264 psi
220 / 104 250 / 121 244 / 118
D3418 Melting Point Temp (°F / °C) 335 / 168 347 / 175 347 / 175
- Max Operating Temp (°F / °C) 180 / 82 180 / 82 180 / 82
C177 Thermal Conductivity
(x 10-4 cal/cm-sec-°C)
UL94 Flammability Rating HB HB HB
D149 Dielectric Strength (V/mil) short time, 1/8" thick 420 450 400
D150 Dielectric Constant at 1 MHz 3.8 3.7 3.1
D150 Dissipation Factor at 1 MHz 0.005 0.005 0.010
D257 Volume Resistivity (ohm-cm) at 50% RH 1015 1015 3.0 x 1016

[Delrin material chart]

Experts in Machining Delrin® Acetal

When working with Delrin 150, we utilize advanced multi-axis machining capabilities to ensure precise tolerances are met each and every time. Our CNC machining technology provides the precision and repeatability to create complex parts with minimal handling and fixturing. In many cases, highly intricate parts can be completed in a single operation.

Using DPD/MBD processes (Digital Product Definition/Model-Based Definition) allows us to work directly from your completed CAD models. This capability reduces manufacturing errors and guarantees high-quality parts at low cost. We provide high quality, cost-effective Delrin plastic parts.


Top-Flight Communication through Every Step of Your Project

When you work with Upland Fab, you’ll have a single point of contact throughout your entire project. We prioritize customer communication and provide consistent, reliable updates to keep you informed as your project progresses. We keep you in the loop from the first step to the last.


Other Materials We Work With

Are you looking for another material? We have the ability to machine many different materials take a look below at some of the other plastics we work with. 

  • ABS
  • Kydex®
  • PET
  • PSU
  • CPVC
  • LDPE
  • PVC
  • Polypropylene (PP)
  • Nylatron®
  • Polystyrene (PS)
  • UHMW
  • HDPE
  • PPSU


Contact Upland Fab to Learn More About Delrin Plastic Machining

We have been providing top-flight plastic and composite machining in Southern California since 1970. Contact Upland Fab to discuss your Delrin acetal project or get a quote to get started today.

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Precision Plastic and Composite CNC Machining

Precision Plastic and Composite
CNC Machining since 1970.

Precision Plastic and Composite CNC Machining
©2024 Upland Fab - 1445 W Brooks Street, Unit L, Ontario, California 91762 - Phone: (909) 986-6565
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