At MYT Machining, we understand the demands of industries that rely on engineered plastics for strength, stability, and precision. One of the most reliable and versatile thermoplastics we work with is Acetal Copolymer (POM-C). Our extensive experience in acetal c machining enables us to deliver dimensionally stable, wear-resistant components for industries where performance and precision matter most.
What Is Acetal C (POM-C)?
Acetal Copolymer, also known as POM-C or Acetal C, is a high-performance engineering plastic known for its:
Low moisture absorption
Excellent dimensional stability
High tensile and impact strength
Low coefficient of friction
Superior machinability
POM-C is distinct from Acetal Homopolymer (POM-H) in its better chemical resistance and reduced centerline porosity. These features make Acetal C particularly suited for applications that demand chemical exposure resistance and consistent performance in moisture-sensitive environments.
Applications of Acetal C Machined Parts
Thanks to its outstanding balance of mechanical and thermal properties, Acetal C is widely used in various sectors:
Automotive
Fuel system components
Window lift systems
Bearing cages
Pump housings
Food Beverage
FDA-compliant parts such as gears, rollers, and scraper blades
Low moisture uptake ensures sanitary performance
Excellent resistance to cleaning agents
Medical
Instrument housings
Fluid handling components
Single-use or sterilizable assemblies
Industrial Machinery
Bushings, gears, and wear strips
Fixtures and positioning tools
Conveyor system parts
At MYT Machining, we partner with clients from each of these industries to create custom components tailored to their functional, environmental, and safety requirements.
Why Acetal C Is Ideal for Machining
One of Acetal C’s most valuable traits is its excellent machinability. This makes it a cost-effective material for parts requiring tight tolerances and smooth finishes. Compared to other plastics like nylon or UHMW, Acetal C maintains rigidity and precision even after extensive cutting or shaping.
Benefits of Machining Acetal C:
Stability: Holds tolerances better than most plastics due to minimal thermal expansion.
Surface Finish: Produces a smooth, low-friction finish without secondary polishing.
Chip Formation: Breaks into manageable chips, reducing tool fouling.
Low Tool Wear: Machinists can use standard high-speed steel or carbide tools.
Our shop is fully equipped to handle Acetal C in both small-batch and high-volume production. With multi-axis CNC machines and specialized workholding techniques, we deliver consistent, high-quality results for complex geometries and thin-walled parts.
MYT Machining’s Process for Acetal C Projects
We follow a streamlined and proven process to deliver precision parts made from Acetal C:
1. Material Selection Design Review
We help you choose the right Acetal grade and analyze the 3D model or drawing for optimal manufacturability. Considerations include wall thickness, fillets, stress points, and finish requirements.
2. CAM Programming
Using advanced CAM software, we develop toolpaths specifically optimized for Acetal C’s properties—taking into account chip evacuation, spindle speed, feed rate, and tooling strategy.
3. CNC Machining
Whether turning, milling, or routing, our machines are calibrated to run Acetal C at optimal parameters. We monitor tool condition and spindle temperature to ensure dimensional stability.
4. Inspection Quality Control
Using digital calipers, micrometers, and CMMs, we measure critical dimensions to your exact specs. We also perform visual inspections for surface integrity, burrs, or warping.
5. Finishing Packaging
Because Acetal C machines cleanly, parts often require no post-processing. However, when required, we offer deburring, tapping, thread inserts, and surface treatments.
Common Challenges in Acetal C Machining—and How We Overcome Them
While Acetal C is easier to machine than many other plastics, it still poses some challenges if not handled properly.
Warping
Due to internal stresses or poor heat management during cutting, parts can warp post-machining. MYT Machining prevents this by:
Using sharp tools and light cuts
Avoiding high heat buildup
Clamping parts strategically to minimize residual stress
Threading and Tapping
Acetal's slippery surface can complicate internal threads. To mitigate this, we:
Use sharp taps or thread mills with correct back-out strategies
Avoid excessive torque to reduce the risk of cracking
Offer threaded inserts for secure, repeatable assembly
Material Movement
POM-C expands under heat and contracts when cooled. We account for this by:
Using temperature-controlled environments
Incorporating compensation into toolpaths and offsets
Allowing parts to cool before final inspection
Tips for Designing Acetal C Parts
To optimize your design for machining and performance, consider the following:
Avoid Sharp Internal Corners: Use radii to reduce stress concentration.
Use Threaded Inserts Instead of Tapped Holes: For durability and repeated use.
Allow for Thermal Expansion: Especially in long parts or when mated to metals.
Minimize Thin Walls: To prevent deflection or cracking under load.
If you’re unsure, our engineering team will work with you during the design review to fine-tune your model for optimal results.
Why Choose MYT Machining for Acetal C Projects?
We are not just a machine shop—we are a manufacturing partner. Our in-depth material knowledge, investment in technology, and focus on customer service make us the ideal choice for precision polymer machining.
Our Advantages:
Multi-axis CNC machines tailored for plastics
Decades of hands-on polymer machining experience
In-house design review and process optimization
Quick turnaround times
Transparent communication from quote to delivery
Whether you need a prototype, a small batch, or production-scale components, MYT Machining can deliver Acetal C parts that meet your quality and timeline expectations.
