chamfer
It is used to remove sharp edges, reduce the risk of edge chipping, and improve the feel and safety of assembly. It is recommended to mark the chamfer size or "sharp edge removal" on the drawings.
Acetal (POM)
Acetal (POM) features "dimensional stability, low friction, wear resistance, and good machinability," making it a cost-effective choice for CNC machining plastic parts.
Quote checklist: Upload your 3D model and, when available, a 2D drawing. Identify the required process, material, quantity, critical dimensions, finish, appearance standard, and target delivery date.
Key Material and Manufacturing Parameters
Engineering note: Values below are typical reference ranges. Final manufacturability, tolerances, material condition, surface finish, cost, and lead time depend on the drawing, geometry, quantity, and selected process.
Upload CAD files and mark critical features for an engineering review before production.
| Process | CNC Machining |
|---|---|
| Material | Acetal POM (polyoxymethylene POM) |
| Common colors | Mainly natural color (milky white/white); black and other colors are subject to stock plates and rods |
| General machining accuracy | ±0.2 mm (regular capability; please mark tolerances or note "accuracy first" for key dimensions/fits) |
| Minimum wall thickness recommendations | ≥ 1.0 mm (Thinner structures need to evaluate the risks of clamping, vibration and deformation) |
| Holes/Slots and Fittings | It is recommended to define the mating hole by "base + tolerance"; it is recommended to indicate the assembly method and allowable deformation of the interference/press-fit structure. |
| Chamfer/fillet recommendations | It is recommended that the edges be chamfered to relieve stress and prevent edge chipping; the inner corners should be rounded as much as possible to match the tool radius and reduce the risk of cracking. |
| Surface expression | The surface of POM is relatively "waxy/low surface energy". When the appearance requirements are high, it is recommended to clarify the polishing level and directionality requirements. |
| Typical applications | Gears, sliders, bushings, guides, bushings, fixtures, wear-resistant structural parts |
| Finishing | Chamfering, grinding, bonding, screen printing, laser engraving |
| Typical lead time | Related to size, quantity, number of processing surfaces and finishing; clear delivery and expedited options will be given after uploading the file |
Finishing
polish
Used to improve the feel of knife grain and edges; if you are sensitive to appearance consistency, it is recommended to note the grinding direction, key surfaces and acceptable texture standards.
bonding
Suitable for assembly and fixation after component processing; please indicate the bonding surface, positioning method and strength requirements in the remarks to facilitate the evaluation of the structure and process.
screen printing
Suitable for logos, scales and marking information; it is recommended to provide vector files and position and size instructions, and indicate the direction and visible surface.
Laser engraving
Used for permanent identification (numbering/QR code/Logo, etc.); please provide content files and position reference to avoid engraving in areas subject to strong force or critical coordination.
Why choose Acetal (POM)
Low friction, smoother movement
Suitable for sliding guides, rotating supports and transmission structures, commonly found in sliders, bushings and gear parts.
Good wear life
Under reasonable structure and load conditions, POM has stable wear resistance and is suitable for structural parts with "repeated motion/contact".
Dimensional stability and assembly consistency are more controllable
Suitable for part manufacturing that require matching relationships; it is recommended that key hole slots and datums be clearly defined with 2D tolerances.
Smaller batches are more cost-effective
CNC is suitable for rapid iteration and small batch delivery; it can also cooperate with Laser engraving/screen printing Implement identification and version management.
Recommended Applications
- Wear resistant/low friction construction: Slider, bushing, guide, bushing, gear, etc.
- Assembly mating parts: Structural parts that require stable slots and positioning (it is recommended to mark tolerances and benchmarks)
- Fast delivery of small quantities: Sample verification, trial assembly, trial production and small batch spare parts
- Need identity management: Laser engraving number/QR code, screen printing scale/Logo
It is not recommended to use it directly (it is recommended to change materials/processes)
- Strong bonding dependence: POM has low surface energy, and the bonding reliability needs to be carefully evaluated (the structure can be changed or the material can be changed)
- High temperature and long-term work: It is recommended to evaluate materials with higher heat resistance when working near a heat source or under continuous high temperature conditions.
- Strong appearance painting: If a highly consistent painted appearance is required, it is recommended to evaluate plastic systems that are easier to handle
- Extremely thin/slim parts: The risk of clamping and tool vibration is high. It is recommended to do DFM or change the structure/parts first.
Design and DFM Guidelines
- First define the cooperation clearly: For gear meshing/sliding guide/axle sleeve parts, key dimensions, tolerances and benchmarks must be marked; if unsure, you can note "clearance fit/interference fit + target assembly method".
- Avoid thin-walled long cantilevers: Thin-walled and slender structures are more susceptible to vibration and deformation. It is recommended to thicken/reinforce the structure, or to process it in separate parts and then bond/assemble it.
- Make internal corners as rounded as possible: Filleting the inner corners can match the tool radius and reduce stress concentration; it is recommended to chamfer the outer corners to reduce chipping and assembly scratches.
- Clamping surface and reference surface: Try to reserve a clampable area; if there is a key appearance surface/key mating surface, please define and note "protected surface/no clamping" in the drawing.
- Logo and engraving location: Laser engraving/screen printing should be placed in non-stressed and non-cooperating areas as much as possible, and clear positioning benchmarks and direction requirements should be provided.