Gears
Gears and mechanisms requiring rigidity and precision.
Engineering plastics · Custom parts
CNC machining
of POM.
Fits, sliding, and precision. We manufacture machined POM parts for gears, guides, and mechanisms requiring dimensional stability.
Get your quoteQuote in 24 h · Engineering review
- From
- 1 unit
- Delivery from
- 8 working days
- Material
- POM Engineering plastic
01 / Why choose this material
Properties and uses
of POM.
Rigid and stable plastic, with low moisture absorption and good sliding behavior. Suitable for mechanisms and precision parts.
POM, also known as acetal or polyoxymethylene, combines rigidity, low moisture absorption, and good wear resistance. It is used for bushings, rollers, and precision parts. Delrin is a brand of POM homopolymer, not the name for all acetals.
Learn about the CNC machining process ↗POM Properties
Mechanical reference · Proto&Go! material datasheet
- Indicative density
- 1,41–1,43 g/cm³
- Tensile strength
- 60 MPa
- Flexural modulus
- 2,8 GPa
- Hardness
- 85 Shore D
- Presentation
- Semi-finished for CNC
Delrin is a brand of POM-H, not a synonym for all POMs. For chemical agents, check concentration and temperature; conductive variants are not insulators. Added values are references from the published PDF; the supply grade and test may vary them.
Material datasheets
- Low friction
- Good wear resistance
- Standard grade electrical insulator
- Low moisture absorption
Applications of POM
Bushings and guides
Bushings and guides operating in sliding applications.
Rollers
Rollers for guiding and transporting defined loads.
Precision parts
Fitting parts where low moisture absorption is critical.
02 / A choice based on usage
Choose POM
based on your part.
These criteria help define the material, geometry, and working conditions before manufacturing.
01
POM-C
Copolyacetal. Approximate density of 1.41 g/cm³ and good stability for mechanisms.
02
POM-H · Delrin
Homopolyacetal. Approximate density of 1.43 g/cm³; confirm the grade if the drawing requires this variant.
The part's function is the starting point.
Indicate loads, temperature, environment, and appearance needed. If the drawing requires a specific grade, include it in the request.
03 / Finishing also counts
Finishes and appearance
of POM.
Material and process define the surface. These are the key factors for specifying your part's appearance.
Machining finish
The part retains machining marks. Indicate adjustment surfaces and visible faces on the drawing.
Geometry and surfaces
For functional surfaces, define roughness and tolerances in the drawing. Feasibility is reviewed based on grade and geometry.
Your part requirements
Include the expected appearance and usage conditions in your request to confirm the quote.
04 / From design to quote
CNC machining
of POM.
Milling and turning allow manufacturing POM parts from a block, plate, or bar. The tool removes material to obtain faces, cavities, drilled holes, and contours according to the design.
Send a 3D model per part in STEP or a native supported format: SLDPRT, X_T, X_B, IPT, CATPART, PRT, SAT, or 3DM. Attach a PDF drawing for threads, inserts, or specific tolerances. STL is accepted only for 3D printing.
Upload your file and request a quotePart tolerances
For dimensions without a specific tolerance, Proto&Go! applies ISO 2768-m. With a drawing, equivalent tolerances to IT11 can be assessed, depending on the geometry and requested dimensions. Attach the drawing and mark the functional surfaces.
Calculate a tolerance ↗Quantity and cost per part
In CNC, setup costs are distributed across the batch units. The final reduction depends on machining time and material.
Quote in 24 hours
Parts from 8 working days after confirming the order. The quote specifies the lead time based on geometry, material, finish, and quantity.
How much it costs to manufacture
The price of your part
in POM.
The price to machine POM depends on geometry, grade, tolerances, finish, and quantity. It includes material, preparation, and machining.
Check the catalog example to compare materials. To know the cost of your design, request a quote with your 3D file.
Frequently asked questions
Before manufacturing
in POM.
Properties, applications, and manufacturing: answers to prepare your request.
What is POM and what properties does it have?
Rigid and stable plastic with low moisture absorption and good sliding performance. Suitable for mechanisms and precision parts. Delrin is a brand of POM-H, not a synonym for all POMs. For chemical agents, check concentration and temperature; conductive variants are not insulators. The listed values are references from the published PDF; the supply grade and testing may vary.
What parts can be machined from POM?
We can manufacture gears, bushings, and guides, rollers, and precision parts. CNC machining allows adapting the geometry to your 3D file. Define the loads, the environment, and the finish so we can review the application.
Are POM and Delrin the same material?
Delrin is a brand of POM-H, the homopolymer acetal. POM-C, a copolymer with different properties, also exists. If you need a specific variant, indicate it on the drawing; it is not advisable to use Delrin as a synonym for any POM.
POM or PA6 for manufacturing a bushing or a gear?
POM stands out for its low moisture absorption and dimensional stability. PA6 offers toughness and wear resistance, but moisture influences its dimensions more. Also compare the load, speed, and mechanism environment.
Can POM be machined to work in contact with chemical products?
Yes, in applications compatible with the selected grade. The agent, concentration, temperature, and exposure time must be known. POM's good chemical resistance does not mean it resists any substance or cleaning condition.
How much does it cost to machine a POM part?
The cost to machine POM depends on the geometry, grade, tolerances, finish, and quantity. It includes material, preparation, and machining. Upload the 3D file to the Proto&Go! platform to receive a quote with cost and lead time.
What tolerances can I request for a POM part?
For dimensions without a specific tolerance, Proto&Go! applies ISO 2768-m. With a drawing, equivalent tolerances to IT11 can be assessed, depending on the geometry and requested dimensions. Attach the drawing and mark the functional surfaces.
What file do I need to manufacture a POM part?
Send a 3D model per part in STEP or a native supported format: SLDPRT, X_T, X_B, IPT, CATPART, PRT, SAT, or 3DM. Attach a PDF drawing for threads, inserts, or specific tolerances. STL is accepted only for 3D printing.
Compare before choosing
Other options for your part.
Your next part
Shape it
in POM.
Upload the 3D file. We review feasibility and send you the quote.