OEM CNC machined POM parts per specific drawings from China
We manufacture machined POM parts and CNC machined POM components for OEM and industrial customers around the world, produced strictly from specific drawings, CAD models, or supplied physical samples. Our custom POM machining workshop delivers POM machined parts per drawing in both homopolymer and copolymer acetal, covering Polyoxymethylene machined parts, Delrin machined parts, and acetal plastic machined components made by precision CNC turning, CNC milling, drilling, tapping, and fine finishing.
From a single custom CNC machined POM prototype to repeat high-volume production, every order of custom machined acetal parts follows the dimensions, tolerances, material grade, color, and surface requirement defined by the customer. When no drawing exists, we can also measure and duplicate POM components directly from a sample.
Drawings or samples
PDF, DWG, STEP, IGES files or a physical sample are all accepted to start POM parts made to drawing.
Turning & milling
CNC turning POM parts and CNC milling POM parts, including POM turned components and POM milled parts.
One-off to volume
Single prototypes, small batches, and large serialized batches of precision machined POM parts.
Full acetal range
Natural, black, and colored POM-H, POM-C, glass-filled and lubricated acetal stock in rod, plate, and tube.
Custom CNC machined POM parts we produce
A selection of machined POM and acetal plastic components manufactured to customer drawings, including POM gears, bushings, and custom-milled mechanical parts.
POM, acetal, and Delrin: the material behind machined POM parts
POM is the abbreviation of Polyoxymethylene, a high-crystalline engineering thermoplastic that is most commonly known as acetal. Delrin is a widely recognized trade name for a homopolymer acetal grade, so in everyday machining language POM, acetal, and Delrin refer to the same material family. Polyoxymethylene machined parts, Delrin machined parts, and acetal plastic machined components therefore share the same core advantages: high stiffness, excellent wear behavior, very low friction, stable dimensions, and clean, predictable chip formation during custom plastic machining.
POM-H homopolymer acetal (Delrin-type)
Homopolymer acetal is formed from a single monomer structure and shows slightly higher tensile strength, surface hardness, stiffness, fatigue resistance, and creep resistance than copolymer stock. It machines with a hard, glossy cut surface and is the preferred choice for highly loaded, thin-walled, or repeatedly flexed precision machined POM parts.
- Higher mechanical strength and spring-like fatigue endurance for gears, cams, and snap elements
- Natural off-white / ivory color as standard, black and colored stock available
- Typical choice for CNC machined POM gears, levers, springs, and thin wear parts
POM-C copolymer acetal
Copolymer acetal incorporates a second comonomer, which lowers the melting point slightly while improving thermal stability, chemical resistance, and resistance to hydrolysis. It has virtually no center-line porosity, machines very evenly in large cross-sections, and is often selected for acetal plastic machined components exposed to moisture, hot water, fuels, or alkaline cleaning agents.
- More stable against chemicals, hot water, and steam-side environments
- Denser, porosity-free structure for reliable sealing and pressure contact surfaces
- Typical choice for CNC turned POM bushings, valve seats, pump components, and insulators
Unfilled natural POM
The general-purpose grade for most machined POM parts, balancing strength, toughness, sliding behavior, and economy.
Black POM / black acetal
Pigmented black stock with the same core properties, chosen for optical contrast, sunlight-exposed parts, and wear surfaces.
Glass-filled POM (GF-POM)
Glass fiber reinforcement raises stiffness and dimensional rigidity and reduces creep under sustained loads for rigid POM components.
PTFE / MoS2 lubricated POM
Internally lubricated acetal lowers coefficient of friction further for bearings, slides, and continuously moving POM milled parts.
Why engineers choose precision machined POM parts
The combination of mechanical, tribological, and dimensional properties below explains why POM is one of the most frequently machined engineering plastics for moving, sliding, and close-tolerance components.
Strength and stiffness
POM combines high tensile and flexural strength with rigidity close to many metals by weight, letting custom CNC machined POM parts replace brass, aluminum, or steel in lightly loaded mechanisms while cutting mass and noise.
Low friction and wear
An inherently slippery surface gives POM turned components a low coefficient of friction, so POM bearings, bushings, gears, and slides often run dry without external grease and keep wear rates low over long service cycles.
Dimensional stability
High crystallinity and low creep help POM machined parts per drawing hold bores, pitches, and positional tolerances over time, even under constant clamping or repeated loading in assembled mechanisms.
Low moisture absorption
Acetal absorbs very little water compared with nylon and other hygroscopic plastics, so CNC machined POM components remain dimensionally stable in humid air, washdown environments, and wet operating conditions.
Fatigue and spring-back
POM withstands repeated bending and impact cycles and returns to shape, which makes it suitable for snap-fit clips, spring elements, ratchets, and custom machined acetal parts that cycle thousands of times per day.
Chemical resistance
Acetal resists oils, greases, fuels, solvents, detergents, and weak alkalis, supporting POM components in fuel-contact, lubrication, and washdown equipment; prolonged strong-acid exposure should be avoided.
Electrical insulation
Stable dielectric properties and low moisture uptake make Delrin machined parts useful as insulators, spacers, terminal blocks, and switch components in electronic and electrical assemblies.
Wide operating temperature
POM stays tough in sub-zero conditions and supports continuous service around 100 degrees Celsius for most grades, with short-term exposure higher, suiting both cold-chain and warm machinery environments.
Common POM colors and stock forms
We machine Polyoxymethylene stock in the colors most often requested by OEM drawings. Pigment mainly changes appearance and UV/wear behavior rather than the core mechanical properties; custom color matching can be arranged by grade and purchase lot. POM is supplied as extruded or cast rod, plate, sheet, and tube that we cut and machine to shape.
Natural / ivory white
The un-pigmented stock color; easy to inspect and the default for general machined POM parts.
Black
The most common colored grade; strong visual contrast for assemblies and exposed wear surfaces.
Red
Frequently used for safety-relevant handles, knobs, and color-coded functional elements.
Blue
Popular for jigs, fixtures, guide parts, and visible components in automation equipment.
Green
Used for color-coded rollers, wheels, and machine-specific identification parts.
Gray and yellow
Gray and yellow stock round out standard coding schemes; other colors follow drawing requirements.
Machining performance of POM
Acetal is one of the most machinable of all engineering thermoplastics. With sharp carbide tooling it produces short, clean chips and a smooth, slightly glossy cut surface, allowing CNC turning POM parts and CNC milling POM parts to reach close bores, fine pitches, thin walls, and crisp edges without the melting, smearing, or burr-heavy behavior seen on softer plastics. POM can be turned, face-milled, profile-milled, drilled, reamed, bored, tapped, threaded, knurled, and cut off from rod, plate, or tube stock.
Because acetal expands more than metal with heat, our custom POM machining process uses controlled feeds, sharp finishing passes, air blast or coolant to keep parts cool, and allows stress and temperature to settle before final inspection passes. Workholding is kept firm but non-crushing to avoid clamping deformation. The resulting precision machined POM parts need no painting or plating; as-machined surfaces are smooth, and edges are deburred or lightly chamfered. CNC machining also avoids mold tooling investment, so custom CNC machined POM components are economical from the very first piece and design revisions cost nothing in tooling.
Commonly machined POM and acetal parts
Our CNC shop regularly produces the following custom CNC machined POM parts from customer drawings. Beyond the twelve categories shown, we also machine POM racks, worm wheels, star wheels, feed screws, nozzles, insulators, sensor holders, housings, brackets, covers, end caps, paddles, positioning blocks, and almost any non-standard plastic CNC machined part that can be defined on a drawing or shown by a sample.
CNC machined POM gears
Spur gears, helical gears, bevel gears, pinions, gear segments, and worm wheels that mesh quietly, absorb vibration, and run without lubrication in office machines, conveyors, and gearboxes.
Custom CNC machined POM bushings
Straight sleeve bushings, flanged bushings, shoulder bushings, and wear bushes for shafts, pivots, hinges, and linkage points across machinery of every kind.
CNC machined POM bearings
Plain journal bearings, thrust bearings, and linear bearings turned from natural, black, or internally lubricated acetal for dry-running and low-maintenance designs.
CNC machined POM rollers
Conveyor rollers, guide rollers, pressure rollers, idler wheels, and V- or U-grooved wheels with precision bores for bearings and shafts.
CNC machined POM pulleys
Timing belt pulleys, flat-belt pulleys, rope pulleys, and sprockets with accurate tooth profiles and balanced grooves for smooth power transmission.
Custom CNC machined POM spacers
Standoffs, distance sleeves, adapter tubes, and locating spacers turned to exact lengths and bore diameters for stacked mechanical assemblies.
CNC machined POM washers
Flat washers, thrust washers, shoulder washers, and sealing-support washers milled or turned from sheet, plate, or tube stock.
CNC machined POM cams and levers
Cam discs, cam followers, actuating levers, ratchets, and index wheels that exploit the fatigue endurance and self-lubricating surface of acetal.
Custom CNC machined POM guide parts
Linear guide blocks, slide rails, wear strips, chain guides, and rail pads that protect metal rails and dampen impact in automation lines.
CNC machined POM valve and pump parts
Valve seats, seal seats, impellers, diffusers, piston rings, and manifold components that benefit from chemical resistance and low water uptake.
CNC machined POM jigs and fixtures
Inspection fixtures, locating blocks, assembly nests, and work-holding jigs colored for visibility and gentle contact with delicate workpieces.
Custom CNC machined POM fasteners
POM nuts, bolts, threaded sleeves, knobs, grips, handles, and housings for metal threaded inserts, all tapped and machined to customer drawings.
POM machining processes and dimensional inspection
Custom plastic machining for POM combines subtractive CNC processes with independent dimensional verification. POM turned components come from CNC lathes, while POM milled parts come from CNC machining centers; finished parts then pass through instrument-based inspection before packing.
CNC milling POM parts
Vertical and horizontal CNC milling centers cut pockets, profiles, holes, slots, gear teeth, and 3D contours from POM plate and block, producing precise POM milled parts in single or multiple setups.
CNC turning POM parts
CNC lathes turn outer and inner diameters, grooves, chamfers, and threads from POM rod and tube, delivering concentric POM turned components such as bushings, rollers, sleeves, and pulleys.
2D profile projector inspection
A non-contact optical profile projector checks small radii, angles, tooth outlines, thin-wall contours, and projected profiles that are difficult to measure reliably with hand tools.
CMM coordinate measuring
A coordinate measuring machine verifies bore positions, hole patterns, flatness, and 3D relationships on precision machined POM parts, supported by micrometers, bore gauges, and thread gauges.
Inspection follows the drawing rather than a generic standard: critical bores, pitches, and positional dimensions are checked against the tolerances stated on each print, first-article dimensions are recorded before batch production continues, and in-process checks monitor tool wear on long runs of CNC machined POM components. Surface appearance, color, edge quality, and cleanliness are confirmed before parts are packed for shipment.
How custom POM machining orders are handled
Every order of machined POM parts is built around the customer's own technical data. The eight working modes below cover drawing-based production, sample-based duplication, OEM supply, and broader custom plastic machining.
POM parts made to drawing
Dimensions, tolerances, material, color, and finish follow the supplied drawing exactly; geometry is never substituted with a stock or catalog part without agreement.
POM components to customer drawings
2D PDF or DWG drawings and 3D STEP or IGES models are reviewed for machinability before cutting, and unclear tolerances are clarified rather than guessed.
OEM POM machining
White-label production for original equipment manufacturers, with consistent dimensions and appearance across repeat batches of branded assemblies and spare parts.
ODM POM plastic parts
Manufacturability feedback and design support for customers developing new acetal components, including wall thickness, corner radii, threads, and tolerance optimization.
Custom machined acetal parts
Fully non-standard geometries in POM-H, POM-C, and filled grades, free from the limitations of catalog sizes or injection-mold tooling.
Precision machined POM parts
Close-tolerance bores, pitch circles, and mating surfaces achieved through sharp tooling, stable workholding, finishing passes, and instrument inspection.
Plastic CNC machined parts
POM can be machined together with PA nylon, PE, PET, PEEK, PTFE, PC, and PU when an assembly combines several engineering plastics in one order.
Sample-based duplication
When no drawing exists, a physical sample is measured, reconstructed, and confirmed before production, ideal for obsolete spares and replacement acetal parts.
From a single piece to large-batch production
CNC machining scales smoothly across every order stage without mold investment, so machined POM parts support the full path from first prototype to serialized high-volume supply.
Single piece and prototype
One-off custom CNC machined POM prototypes for fit checks, mechanism validation, and design iteration, cut directly from rod or plate with no tooling lead time.
Small batch production
Tens to a few hundred POM machined parts per drawing for field trials, pilot machines, spare-part stocks, and equipment built in limited series.
Medium and repeat batches
Recurring batches in the thousands with archived programs, fixed tooling, and matched material grade and color lot for consistent CNC machined POM components.
Large-volume production
Serialized high-volume output using multi-axis fixturing, optimized cycle times, and in-process inspection to hold stable quality across every POM turned and milled part.
Industries using CNC machined POM components
Because acetal combines sliding performance, light weight, chemical resistance, and quiet operation, machined acetal parts appear wherever mechanisms move, guide, transfer, or insulate.
Automotive mechanisms
Window and seat actuators, latch components, gear sets, cable guides, clips, and fuel-system adjacent parts that need low friction and light weight.
Packaging machinery
Guide rails, star wheels, feed screws, change parts, and conveyor components that contact packaging at high cycling speeds.
Textile and printing
Thread guides, rollers, shuttle parts, cam wheels, and ink-system components that must resist wear and run quietly at speed.
Electronics and electrical
Insulators, terminal blocks, switch parts, sensor holders, and structural POM components requiring stable dielectric behavior.
Automation and conveyors
Rollers, wheels, pulleys, wear strips, chain guides, and end stops for automated production and logistics lines.
Office and vending equipment
Quiet gears, cams, levers, and dispensing mechanisms in printers, copiers, vending, ticketing, and sorting machines.
Pneumatic and hydraulic systems
Valve seats, sealing supports, manifold parts, piston guides, and non-marring spacers in fluid-control equipment.
Consumer, sports and instrument hardware
Knobs, handles, hinges, adjustment parts, and mechanism components for appliances, fitness equipment, and precision instruments.
POM machining terms and part coverage
The following index reflects the full range of Polyoxymethylene, Delrin, and acetal work produced in our workshop. Each phrase corresponds to parts we can machine from drawings or samples.
CNC machined POM parts
- CNC machined POM gear
- CNC machined POM bushing
- CNC machined POM bearing
- CNC machined POM roller
- CNC machined POM pulley
- CNC machined POM wheel
- CNC machined POM washer
- CNC machined POM spacer
- CNC machined POM sleeve
- CNC machined POM cam
- CNC machined POM guide block
- CNC machined POM valve seat
Custom CNC machined POM parts
- Custom CNC machined POM gear set
- Custom CNC machined POM flange bushing
- Custom CNC machined POM idler wheel
- Custom CNC machined POM timing pulley
- Custom CNC machined POM wear strip
- Custom CNC machined POM lever
- Custom CNC machined POM fixture block
- Custom CNC machined POM threaded nut
- Custom CNC machined POM knob
- Custom CNC machined POM housing
- Custom CNC machined POM bracket
- Custom CNC machined POM prototype
Process and precision terms
- CNC turning POM parts
- CNC milling POM parts
- POM turned components
- POM milled parts
- Precision machined POM parts
- Custom machined acetal parts
- Custom POM machining
- Custom plastic machining
- Plastic CNC machined parts
- Acetal plastic machined components
- POM machined parts per drawing
- CNC machined POM components
Material and order terms
- Machined POM parts
- Polyoxymethylene machined parts
- Delrin machined parts
- POM-H homopolymer acetal parts
- POM-C copolymer acetal parts
- Glass-filled POM machined parts
- POM parts made to drawing
- POM components to customer drawings
- OEM POM machining
- ODM POM plastic parts
- Black and natural POM machined parts
- Sample-based POM part duplication
Frequently asked questions about machined POM parts
Practical points that customers most often raise when ordering POM machined parts per drawing from China.
Are POM, acetal, and Delrin the same material?
POM and acetal are two names for the same Polyoxymethylene polymer family; Delrin is a trade name for a homopolymer acetal. Our workshop machines all of them, and drawings using any of these names are treated as acetal unless a specific grade is stated.
Homopolymer or copolymer: which grade fits a part?
POM-H is preferred for maximum stiffness, fatigue life, and thin-walled moving parts such as gears and springs; POM-C is preferred for chemical and hot-water exposure and for porosity-free sealing surfaces. We can recommend a grade once the drawing and operating conditions are reviewed.
What information is needed to quote POM parts made to drawing?
A 2D drawing with tolerances and a 3D model if available, required quantity, material grade, color, and surface expectations. If some information is missing, a physical sample, sketch, or reference photo is enough to begin, and we help complete the technical details.
What tolerances can CNC machined POM components hold?
Depending on size, geometry, and grade, turned diameters commonly reach the hundredth-of-a-millimeter range and milled features a few hundredths, with tighter limits agreed on critical features. Because acetal expands with temperature, tolerance plans account for inspection temperature and wall thickness.
Can POM parts be threaded or fitted with metal inserts?
Yes. Acetal can be tapped, single-point threaded, knurled, press-fitted, and fitted with heat-set or molded-in metal inserts. For frequently disassembled joints, metal threaded inserts are recommended to protect the softer POM threads.
Can parts be produced from a sample without any drawing?
Yes. We measure the sample with calipers, micrometers, projector, and CMM as needed, reconstruct the geometry, and confirm the proposed dimensions before cutting production material, which is especially useful for replacement and obsolete spares.
Which stock forms and colors are available?
POM is stocked as rod, plate, sheet, and tube in natural ivory, black, and common colors, including filled and lubricated grades. Stock form is selected from part geometry: rod for CNC turning POM parts and plate for CNC milling POM parts.
When is machining better than injection molding for POM?
Machining needs no mold, starts immediately, and costs less for prototypes, spares, and small-to-medium batches while allowing free design changes. Molding becomes attractive only at very high quantities of a frozen design, and machined parts are often used to validate that design first.
A China workshop focused on custom CNC machined POM parts
As an OEM POM machining and ODM POM plastic parts supplier, we concentrate on one thing: turning customer drawings and samples into accurate, repeatable machined POM parts. Whether a project calls for machined POM parts in natural homopolymer, black copolymer, glass-filled acetal, or lubricated Delrin-type stock, the same workflow applies: review the drawing, select the stock form, produce CNC turning POM parts and CNC milling POM parts on precision machines, and verify every critical dimension with calibrated instruments.
Our output spans POM turned components such as bushings, rollers, sleeves, and pulleys, and POM milled parts such as gears, guide blocks, fixtures, and housings. Together with broader plastic CNC machined parts and custom plastic machining in nylon, PET, PEEK, and PTFE, this capability covers custom machined acetal parts and precision machined POM parts from a single prototype through medium repeat orders to large-batch production. POM parts made to drawing, POM components to customer drawings, Polyoxymethylene machined parts, Delrin machined parts, and acetal plastic machined components are all produced under one roof, keeping lead times, dimensional consistency, and appearance under direct control.