POM (Acetal) Engineering Plastic Precision Machining

POM Acetal Tube & Rod (Black / White / Natural)

Name: POM Acetal Tube & Rod (Black / White / Natural)
Brand: Jiasheng Plastics
SKU: JS-POM-ROD-003
Availability: InStock
Rating: 4.7 (28 reviews)

High-performance polyoxymethylene (POM) rods and tubes offering the perfect balance of strength, stiffness, and dimensional stability for precision-engineered components.

OD (Rod): 6 – 300 mm
OD (Tube): 20 – 500 mm
Length: Up to 2000 mm
Density: 1.41 g/cm³
Tensile Strength: 60 – 70 MPa
Service Temp.: −40 to +100 °C
Colors: Black, Natural (White), Custom

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FDA Compliant Precision Extruded ISO 9001 Certified Worldwide Delivery

Product Description

Jiasheng Plastics is a premier supplier of high-quality POM (Polyoxymethylene) tubes and rods, commonly known as Acetal or Delrin. POM is a semi-crystalline engineering thermoplastic characterized by its high mechanical strength, stiffness, and excellent dimensional stability. At our Dezhou production facility, we utilize state-of-the-art extrusion lines to produce POM rods and tubes that are virtually free of centerline porosity, a common defect in lower-quality acetal products. This ensures that when our customers machine complex parts, the structural integrity and surface finish of the final component are maintained across all cross-sections.

The outstanding dimensional stability of POM makes it the material of choice for precision parts that must function reliably in humid or wet environments. Unlike many other engineering plastics, POM has extremely low water absorption, ensuring that gears, bearings, and valve components do not swell or lose their tolerances when exposed to moisture. Furthermore, POM offers a low coefficient of friction and excellent wear resistance, making it an ideal candidate for sliding applications where external lubrication is either undesirable or impossible to maintain. Our black POM grades are also UV-stabilized, providing enhanced performance in outdoor or industrial lighting applications.

In addition to its physical properties, POM is highly valued for its excellent chemical resistance to a wide range of fuels, solvents, and neutral chemicals. It is widely used in the automotive industry for fuel system components and in the medical sector for surgical instruments and delivery devices. Jiasheng Plastics provides both Copolymer (POM-C) and Homopolymer (POM-H) variants to meet specific technical requirements. Every batch of our POM material undergoes rigorous quality control testing, including density verification, tensile testing, and ultrasonic inspection for internal voids, ensuring we deliver only the highest grade engineering plastics to our global clients.

Technical Specifications

Property	Test Method	POM Copolymer	Unit
Density	ISO 1183	1.41 – 1.43	g/cm³
Tensile Strength at Yield	ISO 527	63 – 68	MPa
Elongation at Break	ISO 527	> 30	%
Flexural Modulus	ISO 178	2600 – 2800	MPa
Hardness (Rockwell)	ISO 2039	M84 – M88	—
Coeff. of Linear Thermal Expansion	DIN 53752	1.1 × 10⁻⁴	K⁻¹
Service Temperature (Long)	—	−40 to +100	°C
Melting Temperature	ISO 3146	165 – 170	°C
Water Absorption (24h)	ISO 62	0.20	%
Dielectric Constant (1 MHz)	IEC 60250	3.8	—
Flammability	UL 94	HB	—

Technical data is based on representative Natural grade samples. Black UV-stabilized grades may have slightly different properties.

Key Features & Advantages

Excellent Dimensional Stability

Minimal moisture absorption ensures parts stay within tight tolerances in humid or submerged environments.

High Stiffness & Strength

Retains mechanical properties over a wide temperature range, outperforming most other polyolefins.

Superior Machinability

Ideal for high-speed CNC machining and automatic lathes. Produces clean edges and smooth surface finishes.

Low Friction & Wear

Self-lubricating properties make it perfect for moving parts like gears, bushings, and guide rollers.

High Chemical Resistance

Resistant to alcohols, aldehydes, esters, ethers, fuels, and many alkaline cleaning agents.

FDA-Compliant Grades

Natural POM is physiologically safe and suitable for direct contact with food and pharmaceutical products.

Industries & Applications

Precision Gears & Cogs

Low-noise, high-precision gears for office automation and industrial machinery.

Automotive Fuel Systems

Fuel sender units, fuel pump housings, and decorative trim clips resistant to petrol.

Pump & Valve Components

Impellers, valve bodies, and seats requiring high dimensional stability in water.

Electrical Connectors

Insulating components and connectors requiring good dielectric strength and creep resistance.

Conveyor System Parts

Wear strips, guide rollers, and cogs for high-speed bottling and packaging lines.

Medical Devices

Surgical instrument handles and drug delivery components that require sterilization.

Sizes & Customization

Jiasheng Plastics offers one of the most comprehensive ranges of POM rods and tubes in the industry. Our rods are available in diameters ranging from 6mm for precision pins to 300mm for large structural components. Our POM tubes are available in a variety of wall thicknesses with outer diameters up to 500mm, allowing you to reduce machining time and material waste for hollow cylindrical parts.

We provide several customization services to add value to your procurement process. These include centerless grinding for precision diameter tolerances (±0.01mm), custom cut-to-length services to meet your specific production runs, and surface planishing for improved flatness. We can also produce custom color-coded rods for industrial identification purposes. All our POM products are stress-relieved during the manufacturing process to minimize warping during subsequent machining operations. Whether you need a single prototype rod or a full container load, Jiasheng Plastics delivers with consistent quality and competitive pricing.

Frequently Asked Questions

What is the difference between POM-C and POM-H?

POM-C (Copolymer) is more resistant to hydrolysis, strong alkalis, and thermal-oxidative degradation. It is the most commonly used grade for general engineering. POM-H (Homopolymer/Delrin) offers slightly higher mechanical strength, stiffness, and hardness, but has lower chemical resistance and is more prone to centerline porosity.

Is POM suitable for food contact applications?

Yes, our Natural (White) POM rods and tubes are manufactured from FDA-compliant resins and are suitable for food processing equipment. POM is widely used for components like filler nozzles, scrapers, and sorting gears in the food and beverage industry due to its low moisture absorption and chemical resistance.

How does POM perform in terms of dimensional stability?

POM is renowned for its excellent dimensional stability. It has very low moisture absorption (less than 0.2%) and a consistent coefficient of thermal expansion. This makes it the preferred material for precision-machined parts that must maintain tight tolerances in varying humidity and temperature conditions.

Can POM rods be easily machined?

POM is considered one of the easiest engineering plastics to machine. It produces short, manageable chips and allows for high-speed cutting with excellent surface finish. It is ideal for automatic screw machines and CNC lathes where high-volume production of precision parts is required.

What are the standard lengths for POM rods and tubes?

Our standard length for POM rods and tubes is 1000mm or 2000mm. However, we can provide custom cut-to-size services to reduce your shipping costs and material waste. We also offer centerless grinding for applications requiring ultra-precise outer diameter tolerances.

What colors are available in stock?

We maintain large stocks of POM in Black and Natural (Opaque White). Custom colors such as Blue, Red, or Yellow can be produced for high-volume orders (MOQ 1000kg) to assist with color-coding in industrial facilities.

POM Acetal Tube & Rod (Black / White / Natural)

Product Description

Technical Specifications