Machined Delrin® Parts

We injection mold, CNC machine, and stamp simple to complex plastic parts.

machined delrin parts that are yellow and black

What is Delrin?

Delrin®, originally developed by DuPont, is a premium polyoxymethylene (POM) homopolymer engineered for high-performance applications. Known for its exceptional stiffness, hardness, dimensional stability, and strength, it stands alongside other POM brands like Celcon, Ultraform, and Kocetal.

While Delrin is commonly supplied as sheets or extruded rods for machining, it is also widely utilized in injection molding Delrin processes. In its granulated form, Delrin is ideal for producing durable, precise components through injection molding and plastic extrusion. However, for intricate designs with undercuts or internal shapes that cannot be achieved via injection molding, plastic machining remains the preferred solution.

Leading global manufacturers rely on machined Delrin parts for high-load mechanical systems. Typical applications include healthcare delivery devices, door systems, safety restraints, conveyor belts, and gears. Delrin combines high strength and stiffness with low friction and excellent wear resistance. It operates reliably across a wide temperature range (maintaining structural integrity for continuous use up to 85 °C and handling short-term spikes up to 120 °C), offers great colorability, and mates effectively with metals and other polymers.

Compared to other plastics, Delrin provides superior tensile strength, fatigue resistance, and impact resistance. This combination of mechanical properties enables the design of thinner, lighter-weight parts while reducing molding cycles and overall production costs.

Contact Jaco to learn more about our capabilities in Delrin machining and Delrin plastic injection molding.

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Advantages of Machined Delrin

Delrin delivers incredible moisture resistance, making it an optimal material for wet environments. It also provides excellent resilience, superior dimensional stability, and high resistance to solvents, hydrocarbons, and neutral chemicals (though applications involving strong acids or extreme alkaline environments may require a different polymer).

Machined Delrin Part Advantages

  • High fatigue resistance

  • High creep resistance

  • High toughness

  • High tensile strength and stiffness

  • Enables thinner, lighter part design

  • Offers potential for reducing part production costs

Delrin Applications

  • Pump components

  • Pistons and valves

  • Rollers

  • Fittings

  • Manifolds

  • Food product forming dies

  • Timing screws

  • Wear strips

  • Electrical insulator parts

  • Gears, bearings, and bushings

  • And More

Have a Delrin Part You Need to be Machined?

With over 70 years of plastic manufacturing experience, we understand how to work with many different plastics to suit our customers’ needs. We produce the parts that others “no quote,” whether it’s a short-run or a high-volume job.

Delrin VS Plastic | What is Delrin Machining?

Customers often confuse Delrin with acetal. Acetal is the generic name for Polyoxymethylene (POM), a broad group of thermoplastics. Delrin is a specific type of acetal (homopolymer acetal); therefore, while Delrin is acetal, not all acetal is Delrin.

How does Delrin compare to copolymer acetal, a material frequently used in the automotive and electronics industries? While copolymer acetal shares high strength, toughness, and dimensional stability, Delrin offers superior mechanical strength and resistance.

While both share incredibly low moisture absorption at room temperature, Delrin separates itself from copolymers through greater stiffness, higher room-temperature tensile strength, and a lower coefficient of friction (the force required to move one surface horizontally over another).

machined delrin parts from jaco, yellow and black

However, Delrin’s unique mechanical properties do not automatically make it the right choice for every project. While Delrin bushings and insulators excel in demanding industrial environments, a less rigid plastic might be suitable for lower-stress applications. To determine the ideal material for your project, consult the material experts at Jaco Products. Our team leverages decades of experience to help you achieve the exact results you need.

What Does it Take to Machine Delrin Parts? | Delrin Mechanical Properties

When machining Delrin parts, it’s important to note that Delrin is a thermoplastic. A thermoplastic is essentially a plastic polymer that becomes pliable at a certain temperature, and then solidifies upon cooling. Common thermoplastics include acrylic and polyester, though Delrin plastic is also a thermoplastic.

The process of machining Delrin plastic is different from machining a thermoset. A thermoset is different from a thermoplastic because it remains “set” once formed, while thermoplastics melt in the heat. For that reason, it helps to know the Delrin material temperature range when working with this material.

So what does it take to machine Delrin plastic? As mentioned, Delrin plastic material is a popular choice in molding and plastics industries because it’s strong, stable, and easy to work with. For applications that need tight or specific tolerances, these Delrin material properties are extremely important. In order to machine Delrin parts, keep in mind that Delrin is sensitive to heat at or about 250F. If you aren’t aware of the Delrin temperature range, you risk deforming the plastic before it reaches its final application.

Here at Jaco, our experts understand the intricacies of machining Delrin parts and can expertly work with Delrin plastic material to meet your requirements.

yellow machined delrin parts: bushings

In order to cool Delrin bushings, consider air-based coolants. This will achieve close tolerances as well as provide a smooth finish. With the right coolant, you can extend the life of Delrin plastic parts.

Another key aspect of machining Delrin plastic material is to avoid any contamination. There are certain demanding industries, like medicine and aerospace, that need Delrin parts that won’t fail. Because of this, the highest level of sanitation needs to be established and maintained by Delrin material suppliers. Jaco Products understands the level of precision and accuracy required to safely process Delrin plastic material, and deliver products to our customers that meet exact specifications. Where other plastic processing companies may shy away from machining Delrin parts, we are eager to take on even the most complex projects.

Talk to the Experts at Jaco about Delrin parts

Our modern, well-maintained lineup of equipment and professional staff allows us to offer service second to none. Let us serve as your Delrin material suppliers.

Jaco Machined Delrin Services

We specialize in engineered materials such as injection molded Delrin and machined Delrin.

Jaco CNC Delrin machining is an effective manufacturing method for the development of products for many different applications. The CNC (Computerized Numerical Control) process utilizes various devices to complete many manufacturing tasks. We also apply our extensive experience with thermoset and thermoplastic materials to further increase the efficacy of CNC Delrin machining.

Our Delrin machining capabilities include 5-axis machining, milling, routing and turning with tolerances of .0001″. We regularly improve our machinery, technology and manufacturing methods, so we can more easily produce parts with high tolerance requirements.

Plastic Materials We Work With

Jaco specializes in the machining of:

  • Delrin
  • Nylon 6/6, 6, 6/12
  • HDPE
  • FR-4
  • G-10
  • PEEK
  • Lexan/Polycarbonate
  • PTFE
  • Teflon
  • Udel
  • UHMWPE
  • Acrylic
  • Ultem

Why Choose Jaco Over Other Plastic Manufacturing Companies?

Jaco Products offers superior service variety and higher quality materials resources than our competitors. We are also more capable of completing challenging plastic manufacturing projects with even the more strict application requirements. Additionally, with an innovative manufacturing process, we can deliver custom solutions to fulfill the requirements of any application. If you’re looking for a reputable plastics manufacturer, you can depend on Jaco to get the job done.

  • Advanced quality control processes

  • Project assistance from prototyping to the final stages of manufacturing.

  • Advanced CNC manufacturing equipment for the fabrication of high-quality products with competitive pricing.

  • Vendor managed inventory systems.

  • Long-term professional relationships.

  • Custom packaging options.

  • Dedication to complete customer satisfaction for every project.

FAQs About Delrin Machining

Delrin, also known as Polyoxymethylene (POM), is an engineering plastic highly favored for its exceptional machinability. It can be easily milled, drilled, turned, and cut while maintaining excellent dimensional stability. Its low friction, wear resistance, and thermal stability make it ideal for precise components like gears and bearings across the automotive, aerospace, and electronics industries.

Delrin, or Polyoxymethylene (POM), is known for its toughness and resistance to cracking. Under normal operating conditions and when used within its specified performance parameters, Delrin is not prone to cracking. It has good impact resistance and can withstand repeated stress and mechanical loads.

However, like any material, Delrin’s performance can be influenced by factors such as temperature, chemical exposure, and stress concentration. Exposing Delrin to temperatures beyond its recommended range, subjecting it to harsh chemicals incompatible with the material, or creating stress concentrations through design or machining errors could potentially lead to issues like cracking.

In summary, Delrin is not inherently prone to cracking, but its performance depends on proper usage and adherence to recommended guidelines for temperature, chemical exposure, and stress management.

  • Polymer Chain: Delrin is a polymer, and its primary structure consists of long chains of repeating molecular units. The polymer chain is made up of oxygen, carbon, and hydrogen atoms.
  • Oxygen (O): Oxygen atoms are part of the polymer chain, contributing to the overall structure and properties of the material.
  • Carbon (C): Carbon atoms are a fundamental element in the polymer chain, providing stability and defining the material’s chemical structure.
  • Hydrogen (H): Hydrogen atoms are also part of the polymer chain, forming covalent bonds with carbon and oxygen atoms.

Common applications for Delrin include:

  • Gears and Bearings: Due to its low friction and wear resistance.
  • Automotive Components: Bushings, clips, and various interior and exterior parts.
  • Consumer Goods: Handles, knobs, and components in appliances.
  • Electronics: Insulators, connectors, and housings.
  • Medical Devices: Various components in medical equipment.
  • Industrial Components: Conveyor belts, rollers, and valves.

It’s important to consider the specific grade of Delrin and any modifications or additives made by manufacturers to meet the requirements of a particular application.

Delrin machined parts offer exceptional strength, stiffness, and dimensional stability, making them ideal for high-performance applications. Machining allows for tight tolerances and intricate designs that can’t be achieved with molding alone. Delrin’s low moisture absorption, high wear resistance, and smooth surface finish make it a preferred choice for gears, bushings, rollers, and precision components across industries such as aerospace, medical, and manufacturing. At Jaco, we specialize in producing both short-run and high-volume Delrin parts, including complex geometries others won’t quote.