Global supplier of
High-Performance Materials

POM (ACETAL) RODS

Acetal rods, also known as polyacetal rods or POM rods, are high-performance thermoplastic engineering materials with exceptional mechanical properties. In many industrial contexts where high strength, stiffness, and dimensional stability are required, high-density polymers such as polyoxymethylene (POM) are widely used. Precision part machining often uses solid cylindrical POM acetal rods. 

There are typically two types of POM: 

A homopolymer is a form that is more chemically resistant and stiff. 

Copolymer: Offers better resistance to stress cracking and increased dimensional stability. 

These rods are ideal for machining and creating incredibly precise, durable, and smooth parts. They are available in a range of colors and sizes.

What are the key features of POM rods?

1、 Chemical Resistance: Exceptionally resistant to a variety of solvents, fuels, oils, and chemicals. 

2、 High Stiffness and Strength: Acetal has exceptional mechanical properties, including as high tensile strength and stiffness. 

3、Resistance to Wear and Abrasion: Acetal rods work well in wear-related scenarios and show exceptional fatigue resistance. 

4、Low Friction Coefficient: POM rods' incredibly low coefficient of friction makes them ideal for sliding and spinning parts. 

5、Easy to Machine: Due to its remarkable machinability, acetal is widely utilized to manufacture complex and accurate pieces.

6、Outstanding Dimensional Stability: POM is stable in a range of climatic conditions due to its low moisture absorption (0.2–0.3% over 24 hours), which results in negligible expansion and contraction. 

7、FDA Compliant: Acetal is suitable for use in the food processing industry if it is made in compliance with FDA regulations for food-grade applications.

How many types of POM rods are there?

1、Colored Acetal Rod: This rod is available in several colors for aesthetic or identification purposes.

2、Natural (White): Most commonly used in wide-ranging and precise industrial applications. 

3、Because it offers even less friction and better wear resistance, carbon-filled acetal is commonly used in high-performance applications. 

4、Black Acetal Rod: Graphite or other lubricants are often added to black acetal rod to improve wear resistance in high-friction applications. 

5、Glass-Filled Acetal: Glass fibers are used to strengthen it for better mechanical properties, strength, and dimensional stability. 

6、FDA Compliant (Food Grade): Adheres to all FDA regulations while in close proximity to food, drugs, and drinks. 

Technical Specifications:

1、Density: 1.41–1.42 g/cm³, varies slightly between grades

2、Tensile Strength: 60–70 MPa (homopolymer), 50–60 MPa (copolymer).

3、Operating Temperature: -40°C to 100°C depends on grades

4、Compressive Strength:~100-120 MPa.

5、Shore D Hardness: ~M85 (Homopolymer), ~M80 (Copolymer)

6、Flexural Strength: ~110-125 MPa

7、Elongation at Break: 40–75%. 

8、Melting Point: 175°C (homopolymer), 165°C (copolymer).

9、Thermal Expansion Coefficient: 10–15 × 10⁻⁶/°C.

What are the advantages and benefits of POM rods?

-Good Thermal Stability: Capable of withstanding mild to high temperatures without noticeably degrading performance. 

-Outstanding Durability: Because acetal rods are so resistant to wear, they last a long time even under high-stress conditions. 

-FDA-approved and non-toxic: suitable for use in food handling and processing industries. 

-Smooth Surface Finish: Because of their smooth texture, which reduces friction, acetal rods are ideal for portions that come into touch with other materials. 

-Simple Fabrication: Cutting, drilling, turning, or milling can be used to easily create parts like bushings, gears, and washers.

-Versatile Machining: This technique is ideal for CNC machining and may be used to produce precise, personalized parts. 

- Noise Dampening: Acetal rods are effective at reducing vibration and noise. 

What applications are POM rods used for?

1、Industrial Equipment: For the rollers, bushings, seals, and mechanical gears of industrial machinery. 

2、Automotive Industry: Used in the manufacturing of high-wear items such precise gears, washers, bushings, and fuel system components. 

3、Marine: Used to create parts that have to endure harsh weather 

4、Food Processing: The FDA has approved acetal rods for use in cutting boards, conveyor systems, and equipment components that come into direct contact with food. 

5、conditions, such as electrical insulators and marine bearings. 

6、Aerospace: For the production of precise, durable, and lightweight components such as bearings and bushings. 

7、As mechanical components for rollers, spindles, and other textile machinery in the textile industry.

8、Medical devices include syringes, surgical equipment, and prostheses. 

Electronics: Used to create insulators and electrical components. 

How to store and handle POM rods?

1、Shelf Life: When stored properly, POM has an endless shelf life; however, for best results, utilize it within five years of purchase.

2、Storage: Acetal rods should be kept out of direct sunlight in a cool, dry location. Over time, the material may deteriorate due to prolonged exposure to moisture or sunshine. 

3、Handling: To avoid contamination, wear gloves when working with acetal. Make sure there is enough ventilation when cutting, machining, or treating the material because tiny amounts of smoke or dust may be produced. 

Frequently Asked Questions

Question 1: Are acetal rods suitable for outdoor use?

Answer:Although acetal is resistant to chemicals and solvents, extended exposure to UV light can cause the material to deteriorate; for outdoor application, use UV-stabilized versions or choose for substitutes such as polyethylene or polypropylene.

Question 2: What distinguishes acetal/POM from nylon?

Answer:Compared to nylon, acetal/POM is more durable, has a lower rate of moisture absorption, and shows superior wear resistance. Acetal stays stable, but nylon absorbs moisture, which can cause dimensional changes.

Question 3: Are POM Rods OK for contact with food?

Answer:Indeed, POM Rods can be produced in accordance with NSF and FDA regulations, making them safe for contact with food when designated as FDA compliant.

Question 4: POM operates at a temperature range of -40°C to 100°C. It may begin to soften or distort at temperatures above 100°C, but it maintains its mechanical properties well within this range.

Answer: difficult; cyanoacrylate or epoxy with surface priming is advised

Question 5: How does POM function in hot conditions?

Answer:The operating temperature range for POM is -40°C to 100°C. At temperatures exceeding 100°C, it may start to soften or deform, but it retains its mechanical qualities well within this range.

Question 6: Does acetal pose any environmental risks?

Answer:Acetal is recyclable and should be disposed of appropriately even if it doesn't contain any hazardous materials. To reduce the influence on the environment, the production process should be handled carefully.