POM / Acetal CNC Machining
Precision CNC machining of POM (Acetal/Delrin) parts for prototypes and low-to-medium volume production. Tight tolerances, stable dimensions, excellent surface finish, and export-ready service from China.
Tolerances ±0.05 mm
ISO 2768 / GD&T
Why Choose POM / Acetal for CNC Machined Parts
POM (polyoxymethylene) — also known as Acetal or Delrin — is a top choice for machined components requiring dimensional stability, low friction, and excellent machinability.
Dimensional Stability
Tight tolerances and low creep even under load, with minimal moisture absorption for consistent performance.
Low Friction & Wear
Inherent lubricity reduces friction in sliding applications: gears, bushings, guides, and wear strips.
Excellent Machinability
Clean chip formation, excellent surface finish, and tight tolerances with standard CNC tooling.
Strength & Stiffness
Good mechanical strength combined with a high-quality surface finish suitable for functional and aesthetic parts.
Chemical Resistance
Resists hydrocarbons, solvents, and many chemicals — ideal for manifolds, valve parts, and fluid handling.
Versatile Applications
Gears, bushings, rollers, guides, wear strips, manifolds, valve parts, pulleys, precision fixtures, sliding elements.
POM-C vs POM-H (Delrin)
Choosing the right Acetal grade is critical for your application. Our engineers help you compare strength, temperature, chemical exposure, friction/wear, and regulatory needs.
Specialty grades available: PTFE-filled, glass-filled, wear-optimized, UV-stabilized, antistatic/conductive, and food-contact compliant grades.
POM-C (Copolymer)
- Better chemical & hot-water resistance
- Lower centerline porosity in thick sections
- Preferred for fluid-handling & large parts
POM-H (Homopolymer/Delrin)
- Higher stiffness & fatigue strength
- Excellent machinability & surface finish
- Ideal for precision gears & high-load mechanical parts
Our POM / Acetal CNC Machining Capabilities
From 3-axis milling to complex turning and assembly, we deliver precision acetal parts that meet your exact specifications.
CNC Milling
3-axis & 4-axis for prismatic parts, pockets, contours, thin walls, precision flatness.
CNC Turning
Bushings, sleeves, shafts, ferrules, threaded parts, stepped diameters.
Holes & Threads
Drilling, reaming, countersinking, tapping (metric/UNF/UNC), NPT/G ports.
Special Features
Keyways, slots, undercuts, knurls, press-fit/slip-fit bores, precision shoulders.
Edge Quality
Controlled chamfers, edge breaks, deburring, polishing/buffing where applicable.
Inserts & Assembly
Heat-set inserts, press-fit inserts, simple sub-assemblies on request.
Marking
CNC engraving, ink/label marking; laser marking possible depending on grade/color.
Quality Inspection
First article inspection, CMM on request, material traceability, RoHS/REACH support.
Tolerances & Surface Finish
Tolerances and finishes depend on geometry, size, material grade, and inspection method. For Acetal, we typically deliver:
General Dimensions
±0.05–0.10 mm for small-to-medium parts; tighter on request with proper design and inspection plan.
Holes & Bores
Reamed or bored features can achieve tighter fits when specified.
Flatness & Parallelism
Controlled via process and fixturing; discuss datum scheme on your drawing.
True Position
Achievable to engineering plastic norms; provide functional datums and GD& RFQ Support Share your 2D drawing, 3D model, material, quantity, tolerance, surface finish, and application details. Our team will review manufacturability and reply with a practical quotation. Email: info@plasticcncpro.com Address: 29 Fuxing Road, Dongguan City, Guangdong Province, ChinaSend Your Drawing for a Quote