CNC Machining for Delrin
Resolute Precision Manufacturing provides precision Delrin machining services for industrial and consumer applications. Delrin is a high-performance acetal material known for its low friction, dimensional stability, machinability, wear resistance, and resistance to many chemicals. These properties make it a practical choice for precision components where low weight, low friction, and corrosion resistance are important. From prototypes to high-volume production, we manufacture machined Delrin parts to meet application requirements and production schedules. Request a QuoteWhy Delrin for Precision CNC Machining
Delrin CNC machining is commonly selected when manufacturers need a lightweight alternative to metal with good dimensional stability, low friction, and wear resistance. Our Delrin precision machining services support the production of precise features, holes, threads, pockets, and complex geometries for demanding applications.
Compared with metal components, machined Delrin can reduce weight while providing corrosion resistance, electrical insulation, and low-friction performance. Proper machining practices are important because thermal expansion and material movement can affect dimensional accuracy, particularly on tight-tolerance components.
For applications requiring repeatable, lightweight, and wear-resistant components, our Delrin machining services can support everything from prototype development to production quantities.
Key Properties of Delrin
- Low friction: Smooth, self-lubricating-type surface for sliding and rotating contact
- Wear resistance: Holds up in repetitive-motion applications such as gears, cams, and guides
- Dimensional stability: Low moisture absorption compared with nylon
- High stiffness and strength: Strong for an unfilled engineering plastic
- Chemical resistance: Resists many fuels, solvents, and lubricants
- Electrical insulation: Suitable for insulators and non-conductive components
- Excellent machinability: Produces clean chips and sharp, well-defined features
Machining Considerations for Delrin
Delrin machines cleanly, but it is not a forgiving material to hold to tight tolerances. Our Delrin CNC machining process accounts for the factors that affect final part quality:
- Sharp, polished tooling for clean cuts and good surface finish
- Controlled feeds, speeds, and heat to limit thermal expansion during cutting
- Light, well-supported fixturing so thin walls and small features don’t distort
- Stress-relieved stock to reduce movement after material is removed
- Chip evacuation and coolant strategy matched to the part geometry
Common Applications for Delrin
- Mechanical slider blocks and wear guides
- Precision gears and sprockets
- Bushings and linear motion components
- Conveyor rollers and idlers
- Spring clips and retainers
- Pump components and low-pressure fluid-handling parts
- Electrical insulators and standoffs
- Cams, rollers, and bearing retainers
Specifications
| CNC Turning | Swiss CNC (20mm–38mm); Y-axis dual spindle lathe, ideal for tight OD tolerances and threaded components |
| CNC Milling | 3, 4, and 5-axis CNC milling for complex geometries, pockets, and contoured surfaces |
| Tolerances | ±0.005″ standard; ±0.002″ achievable with secondary finishing operations |
| Surface Finish | As-machined (Ra 32 µin); polished and hand-finished surfaces available |
| Material | General-purpose acetal copolymer |
| Volume Capability | Prototype through production runs |
| Certifications | ISO 9001:2015 |
Industries We Serve
Aerospace & Defense
Medical Devices
Automotive
Fluid Power
Frequently Asked Questions
Q: What tolerances can RPM hold on delrin components?
We routinely hold ±0.005″ on diameter and length. With secondary finishing (boring, grinding, or polishing), ±0.002″ is achievable. The limiting factor is material creep and thermal expansion in delrin, not machine capability.
Q: Can RPM machine delrin with external coolant?
Yes. Delrin machines cleanly dry or with coolant. We use both approaches depending on the application. Dry machining reduces coolant disposal costs; flooded cooling improves surface finish on precision surfaces.
Q: How does delrin compare to metal for this application?
Cost is typically 30—60% lower for delrin Weight is 1/5th to 1/6th of steel. Chemical resistance and corrosion immunity are superior. However, Delrin has lower strength and stiffness, so structural applications may require metal or reinforced polymer.
Q: Can we source delrin in different colors or grades?
Yes. We stock natural (unfilled) and several pigmented grades. For specialty requirements (UV-stabilized, FDA-approved, flame-retardant, or glass-filled), we can procure material and schedule production. Lead time depends on material availability.