POM CNC Machining
Custom POM CNC Machining Services
POM delivers low friction, wear resistance and dimensional stability for gears, bushings and precision moving parts. Upload your drawing for an engineering review and transparent quote.
Request a POM Parts QuotePOM Material Properties
Key Mechanical Properties of POM
Unfilled POM combines high stiffness, strength and dimensional stability with low friction and low moisture absorption.
Typical ranges for standard unfilled POM-H and POM-C grades. Final values follow the selected grade, conditioning state and supplier test method.
Weldo Machining Capability
POM CNC Machining Capability
Drawing-based milling and turning for POM prototypes, low-volume parts and repeat production.
| Maximum Part Size | 3000 × 1200 × 850 mm |
|---|---|
| Machining Tolerance | ±0.01 mm |
| Minimum Wall Thickness | 1.5 mm |
| Minimum Hole Diameter | Ø 2 mm |
| As-Machined Roughness | Ra 0.8–3.2 μm |
POM / Acetal Materials
Select the Right POM (Acetal) Grade
POM is the engineering plastic commonly called acetal. Compare homopolymer, copolymer and modified grades by load, friction, dimensional stability, electrical control and compliance requirements.
POM Homopolymer
Acetal homopolymer offers higher stiffness, hardness and fatigue strength than the copolymer base family.
POM Copolymer
Acetal copolymer offers better toughness and resistance to chemicals, alkalis, hot water and steam than POM-H.
Glass-Filled POM
Glass-filled acetal increases stiffness, creep resistance and dimensional control under sustained load.
PTFE-Filled POM
PTFE-filled acetal reduces friction, stick-slip and wear in dry-running or continuously sliding assemblies.
Antistatic POM
Antistatic acetal limits electrostatic charge buildup in electronics production and sensitive handling environments.
Food-Contact & Healthcare POM
Compliance is grade-specific; select material with the required food-contact documentation or medical biocompatibility data.
POM Surface Options
Surface Treatments for POM Parts
Explore More Finishes →
Mechanical Polishing
Bead Blasting
Plasma Treatment
Primer & Coating
Controlled Production
From Drawing Review to Final Inspection
Critical dimensions, material requirements and inspection points are defined before machining and verified before shipment.
DFM Review
Grade, tolerances, wall thickness and datum strategy are checked first.
Process Control
Sharp tooling, stable workholding and controlled heat protect part geometry.
Dimensional Inspection
Critical dimensions and geometric tolerances are verified against the drawing.
Delivery Control
Approved parts are cleaned, protected, labeled and packed for shipment.
Machined POM Projects
Custom CNC-Machined POM Parts
Prototype and low-volume POM components machined and inspected to your drawing.
POM Machining FAQ
Project Questions
Concise answers for specifying machined POM parts.
What are the best practices for CNC machining POM?
Use stress-relieved stock, sharp positive-rake tools, rigid support and light clamping. Apply climb milling, remove material evenly, clear chips continuously, then inspect the stabilized part at room temperature.
What are the best cutting tools and speeds for machining POM (Acetal)?
Use sharp HSS or polished carbide tools with generous chip clearance. Starting surface speeds are 200–500 m/min for turning and 200–400 m/min for milling, with milling feed up to 0.5 mm per tooth. Set the final values by tool diameter, grade, wall thickness and machine rigidity.
What are the common challenges encountered when CNC machining POM and how can they be overcome?
Heat, burrs, chip recutting, internal stress and excessive clamping cause dimensional change or poor finish. Control them with sharp tools, effective chip removal, balanced cuts, low clamping pressure and temperature stabilization before final inspection.
What is the recommended coolant or lubrication strategy for POM on a CNC?
Use dry machining with clean compressed air for routine cuts. Apply a compatible water-soluble, non-aromatic coolant for deep drilling, heavy cuts or sustained heat, and keep oil or solvent contamination away from surfaces scheduled for bonding or coating.
How does the thermal expansion of POM affect CNC machining processes and part accuracy?
Cutting heat and clamping change POM dimensions more than metal dimensions. Rough and semi-finish first, allow the part to return to 23°C, then finish and inspect critical features while removing stock symmetrically.
What are the advantages of using POM for CNC-machined parts compared with other plastics?
POM combines low moisture absorption, high stiffness, fatigue strength, low friction, wear resistance and clean machinability. It holds dimensions better than nylon in humid service and provides greater rigidity than PTFE for precision moving parts.