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CNC Machining
POM-C (polyoxymethylene copolymer) is a semi-crystalline engineering plastic with self-lubricating properties, low friction and excellent wear resistance. Through our UK CNC machining service, POM-C CNC parts can be produced as one-off prototypes or repeat batches.
It offers good dimensional stability, low water absorption and high rigidity, and it machines exceptionally well. Typical uses include gears & bearings, electrical applications and pump & valve parts. Its quoted tensile strength of around 89.6 MPa gives a useful guide when sizing parts. Our team can advise whether POM-C is the right fit for your design, or suggest an alternative.
Parts are CNC milled or turned and available in white or black. Bonding is difficult and strong oxidising agents should be avoided. Upload your CAD file for a quick quote on CNC machining POM-C, with delivery anywhere in the UK. Finish options (as machined) can be confirmed when you order.
Material
POM-C
Description
Strengths
Lead time 10 business days. Low-friction, self-lubricating and very stable; ideal for precision moving parts.
Weaknesses
Degrades under long UV exposure
White / black
Ultimate tensile strength
89.6 MPa
Yield strength
72.4 MPa
Modulus of elasticity
4 GPa
Elongation at break
15–75%
Density
Not specified
Hardness
24.8 HV
Water absorption
Low
UK equivalent
Maximum service temperature
96.9°C
Thermal expansion coefficient
202 × 10⁻⁶ /°C
Thermal conductivity
0.35 W/(m·°C)
Electrical insulation
Good
Post-processing
Deburring / bead blasting
Recommended finish
As machined
Gears & bearings
Electrical applications
Pump & valve parts
Sliders, bushings & cams
Values shown are typical supplier figures for POM-C and may vary with stock condition. Please confirm critical properties before production.
Yes. POM-C (acetal copolymer) is one of the easiest plastics to machine. It is stiff, stable and gives a good finish, making it ideal for precision parts.
Plastics are softer and expand more with heat than metals, so very tight tolerances and thin walls need extra care. Achievable tolerances depend on part size, geometry and features, so mark any critical tolerances on a 2D drawing with your upload and they will be reviewed and confirmed in your quote.
POM-C is usually supplied as machined, deburred or bead blasted. It is not suited to long-term outdoor use because UV exposure degrades it.
Typical uses include gears and bearings, electrical applications, pump and valve parts, and sliders, bushings and cams.
POM-C is more dimensionally stable and absorbs very little moisture, so it suits precision moving parts. Nylon is tougher and more impact resistant. PEEK is an option for high temperatures.
The typical lead time shown for POM-C is 10 business days from an approved order. Quantity, finishing and any heat treatment can affect this, and your quote confirms the date before you order.
Parts in as fast as 10 business days
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