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Published by VMT at Apr 29 2025 | Reading Time：About 10 minutes
Are you wondering what makes Delrin (POM-H) a popular choice for precision parts and mechanical applications? If you're in the manufacturing or engineering sectors, understanding this versatile plastic is key. Delrin (POM-H) is an advanced thermoplastic material that offers a unique combination of strength, durability, and chemical resistance. However, many people still wonder about its properties, benefits, and how it compares to other materials for CNC machining. In this article, we'll explore Delrin’s composition, uses, and its role in industries that rely on plastic CNC machining parts.
Delrin (POM-H), a type of polyoxymethylene (POM), is highly valued for its excellent mechanical properties, low friction, and resistance to wear and chemicals. It's widely used for precision parts in industries like automotive, medical, and electronics. CNC machining offers precision, reliability, and versatility when working with Delrin to produce custom parts.
Now that we have an overview of what Delrin (POM-H) is, let’s dive into how this remarkable material is manufactured and what sets it apart from other materials in CNC machining services. Keep reading to learn more about how Delrin is made and the best ways to utilize it in various applications.
Delrin (POM-H), also known as Polyoxymethylene (POM), is an engineering thermoplastic that is widely used for precision parts due to its high strength, rigidity, and low friction. It is commonly found in applications where durability and high-performance are required. Known for its excellent dimensional stability, Delrin is resistant to wear, impact, and fatigue, making it ideal for use in high-stress environments. Unlike many other plastics, Delrin maintains its shape and properties even under extreme conditions, such as varying temperatures and exposure to chemicals.
Delrin is manufactured through a polymerization process of formaldehyde. The chemical reaction creates a high molecular weight polymer, which is then processed into various forms like rods, plates, and tubes. This material can be further shaped through injection molding, CNC machining, or 3D printing. The flexibility in the manufacturing process makes Delrin highly customizable for different industries. Its ability to be processed into precision parts makes it a go-to option for CNC machining factories that require high tolerance and reliability.
Delrin is used in a wide range of industries due to its exceptional mechanical properties. It is commonly used to create POM-H CNC machining parts like gears, bearings, bushings, and other high-performance components. These parts benefit from Delrin’s resistance to wear, heat, and moisture, making them suitable for industries such as automotive, medical, and electronics. Delrin’s low friction properties also make it ideal for parts that need to withstand continuous movement without lubrication.
Delrin Injection Molding
Delrin is often processed through injection molding, which involves melting the material and injecting it into a mold to form the desired shape. This method is ideal for high-volume production runs where consistency and precision are crucial. With Delrin injection molding, manufacturers can create complex parts at a relatively low cost and with high accuracy.
Delrin CNC machining is a popular method for producing parts that require high precision and tight tolerances. CNC machining services use computerized machines to mill, drill, or cut Delrin into intricate shapes. The process is ideal for Delrin CNC machining parts that are needed in smaller quantities or for more complex geometries. This method ensures that the parts maintain high dimensional accuracy and smooth finishes.
Delrin 3D Printing
Delrin can also be used in 3D printing, which is ideal for prototyping or low-volume production. 3D printing allows for rapid iteration of part designs without the need for complex tooling. Although it may not offer the same strength as injection-molded parts, Delrin 3D printing is a great solution for creating custom or intricate parts on demand.
Delrin is used in a wide variety of industries, with each sector relying on its specific properties to meet demanding requirements.
Mechanical Parts
In the mechanical industry, Delrin is commonly used for parts such as gears, bearings, housings, and pump components. Its low friction and high wear resistance ensure that these parts operate smoothly and maintain their function over time, even under high-pressure conditions.
In the electrical industry, Delrin is used for connectors, covers, and insulators due to its insulating properties. Its high strength and resistance to chemicals also make it a durable choice for electrical applications that require reliability in tough environments.
Delrin’s use in the automotive industry is growing, particularly for components such as door locks, actuators, and other moving parts. Delrin’s resistance to wear and thermal stability makes it ideal for automotive parts that need to perform under harsh conditions.
In the medical sector, Delrin is used to produce components like insulin pens and inhalers. Its FDA-approved status and ability to withstand sterilization processes make it a preferred material for medical devices that require durability and hygiene.
The primary benefits of using Delrin for CNC machining parts include:
Assembling Delrin parts is straightforward, but it is important to keep in mind that Delrin doesn’t always adhere well to adhesives. The best method for assembly is typically using screws, bolts, or snap-fit designs, which allow for secure connections without the need for adhesives. If an adhesive is necessary, it is important to choose one that is compatible with Delrin’s chemical properties to ensure a lasting bond.
While the terms Delrin and polyoxymethylene (POM) are often used interchangeably, there is a key distinction between the two.
Key Differences:
In summary, Delrin is a type of POM but with superior properties that make it a favored choice for many engineering and manufacturing applications requiring high strength and precision. When you're looking for top-tier quality and performance in POM CNC machining parts, Delrin is often the material of choice.
Delrin, or polyoxymethylene (POM-H), is a highly durable and versatile thermoplastic polymer that offers a broad range of beneficial material properties. These characteristics make it ideal for various applications, especially in precision CNC machining parts and engineering components. Below, we explore the key material properties of Delrin, both chemical and mechanical, that contribute to its exceptional performance.
Excellent Dimensional and Geometric Stability
One of the standout features of Delrin is its superior dimensional and geometric stability. This property ensures that Delrin parts retain their shape even under varying temperature and humidity conditions. This is crucial for industries that require high precision, such as automotive, medical, and electrical components, where maintaining exact tolerances is essential.
Reliable Processing
Delrin is known for its reliable processing in both CNC machining and injection molding. It is easy to machine and can be processed into complex shapes with excellent surface finishes. This ease of processing makes Delrin a popular choice for producing high-quality, repeatable parts in CNC machining services. It also contributes to reduced production times and cost-effectiveness.
Wear and Fatigue Resistance
Delrin exhibits outstanding wear and fatigue resistance. It maintains its strength and functionality over long periods, even under repetitive motion or heavy loads. These properties make it particularly suited for mechanical components like gears, bushings, and bearings, where parts experience frequent stress and movement. Delrin’s ability to resist wear and fatigue also helps extend the lifespan of parts and machinery.
Good Heat and Chemical Resistance
Delrin offers good heat resistance (up to 90°C, depending on the grade) and is stable in environments with fluctuating temperatures. Its chemical resistance is another important advantage, as it resists most solvents, acids, and neutral chemicals. Delrin's robust chemical properties make it suitable for applications in industries like automotive, chemical processing, and food equipment manufacturing.
Glossy Surface, Opaque White Color
Delrin comes in its natural form as an opaque white plastic, often with a glossy finish. This characteristic provides an aesthetically appealing look while ensuring minimal friction when used for sliding parts or components in motion. Its smooth surface finish is also beneficial in applications requiring low friction coefficients, contributing to durability and wear resistance.
Chemical Properties of Delrin
Delrin’s chemical properties play an integral role in its performance, particularly in extreme environmental conditions. Here are the key chemical characteristics that define Delrin’s suitability for various industries:
Toughness at Low Temperatures
Delrin exhibits exceptional toughness at low temperatures, withstanding temperatures as low as -40°C without becoming brittle or losing its mechanical integrity. This property makes it ideal for automotive and aerospace components that must perform in cold climates or extreme temperature changes.
High Mechanical Strength
Delrin is known for its high mechanical strength, making it an ideal material for load-bearing applications. It provides excellent rigidity and can withstand significant stress without permanent deformation. This property is beneficial for CNC machined parts such as shafts, gears, and structural components where strength is crucial.
Fatigue Resistance
The polymer’s fatigue resistance ensures it performs well under cyclical loading, a key requirement for applications in motors, pumps, and other machinery that experiences repeated stress. The material maintains its performance and structural integrity over long usage periods, reducing the need for frequent replacements or repairs.
Impact and Moisture Resistance
Delrin is highly impact-resistant and retains its toughness even under shock loading. It is also moisture-resistant, meaning it won’t swell or degrade in humid environments. These qualities make Delrin suitable for outdoor applications or in environments subject to constant exposure to water or moisture, such as marine, automotive, or medical device applications.
Easy to Manufacture
Delrin is relatively easy to manufacture, with excellent processing qualities that make it suitable for CNC machining, injection molding, and even 3D printing. It allows for efficient production of precision parts with low tolerance requirements, helping companies save on production time and cost while maintaining high-quality standards.
Insulating Properties for Electrical Purposes
Delrin's insulating properties make it a great choice for electrical applications. It does not conduct electricity, making it suitable for components that require electrical insulation, such as connectors, covers, and switches.
Resistant to Solvents and Neutral Chemicals
Delrin's resistance to solvents and neutral chemicals means it can be used in environments where exposure to liquids is common, such as in chemical processing or food processing industries. This chemical resistance ensures that Delrin parts remain functional and safe over time without breaking down.
Fading Resistance
Delrin’s natural fading resistance ensures that it retains its original appearance and performance even under prolonged exposure to light, making it ideal for outdoor and automotive applications where parts are exposed to UV rays.
In summary, Delrin’s chemical and mechanical properties make it a top choice for manufacturing parts that require durability, precision, and resistance to wear, impact, and harsh environmental conditions. Whether you're using Delrin for CNC machining, injection molding, or 3D printing, its versatility and resilience stand out in a wide range of industries.
Mechanical Properties of Delrin
Delrin (POM-H) is known for its exceptional mechanical properties, which make it a highly reliable material for precision engineering, especially when used for CNC machining parts and plastics manufacturing. These properties contribute to Delrin's ability to perform effectively under a wide range of operational conditions, from simple mechanical components to more demanding applications. Below is an in-depth look at the mechanical characteristics of Delrin:
Ultimate Tensile Strength
Delrin exhibits a tensile strength ranging between 60 - 89.6 MPa. This means that Delrin can withstand significant pulling forces before breaking. The high tensile strength makes it ideal for applications where the material needs to resist deformation under load, such as in gears, bearings, and bushings. The robust tensile properties also ensure that Delrin parts can endure under high mechanical stress without cracking or snapping.
Yield Strength
Delrin’s yield strength lies between 48.6 - 72.4 MPa, which indicates the maximum stress the material can endure before permanent deformation begins. This high yield strength allows Delrin to retain its shape and structural integrity under moderate stresses and makes it suitable for parts that will face continuous loading and unloading, such as in automotive or industrial equipment.
Young's Modulus (Elastic Modulus)
Delrin’s Young’s modulus falls between 2.5 - 4 GPa, which measures the material’s stiffness or resistance to elastic deformation when a force is applied. A higher Young’s modulus indicates a stiffer material, making Delrin a great choice for parts that need to retain their shape under force, like structural components or mechanical assemblies.
Elongation at Yield (Tensile Test)
The elongation at yield value for Delrin is an important indicator of how much the material can stretch before it reaches the yield point. This is critical in parts that will undergo deformation or bending without breaking. Delrin shows an elongation at break between 15% to 75%, depending on the specific grade. This wide range indicates that Delrin can accommodate varying levels of strain before it fails, which is useful in applications that experience dynamic stress.
Hardness
Delrin has a hardness ranging from 14.6 to 24.8 HV on the Vickers scale. This measures the material’s resistance to indentation or wear, making Delrin an ideal choice for parts subjected to continuous friction, such as in gears, bearings, and sliding components. The material's hardness helps to increase the lifespan of components in high-wear environments.
Flexural Strength
Delrin offers good flexural strength, which indicates its ability to resist deformation under bending forces. This property makes Delrin suitable for applications such as spring clips, bushings, and brackets, where parts are expected to bend without breaking. The material retains its shape and function when exposed to bending or flexing forces.
Compression Modulus
Delrin’s compression modulus is an essential mechanical property that defines its ability to resist compression. This makes Delrin ideal for parts exposed to compressive forces, such as cushions, shock absorbers, and load-bearing components. It provides the necessary support for structures that need to maintain their shape while bearing heavy loads.
Compressive Strength
Delrin’s compressive strength is an important factor when designing parts for heavy-duty use, as it refers to how much compressive force the material can withstand without failing. Delrin's high compressive strength ensures that parts such as bearings, seals, and gaskets can perform well under compressive forces without breaking down or losing their mechanical integrity.
Impact Strength (Charpy Impact Strength)
Delrin demonstrates strong impact resistance, as evidenced by its Charpy impact strength. This property is essential for applications where parts are exposed to sudden or dynamic loading, such as automotive and industrial components. Delrin’s ability to absorb energy during impact helps prevent breakage or cracking, making it reliable in shock-prone environments.
Notched Impact Strength (Charpy Impact Strength)
Delrin also performs well in notched impact testing, where a small, localized flaw (notch) is introduced into the material. The material's ability to absorb energy despite the notch ensures that it can resist crack propagation and sudden failure. This makes Delrin an excellent choice for precision parts that are subjected to impacts or shocks during operation.
Shore Hardness
Delrin’s Shore hardness is another key measure of its ability to withstand indentation or deformation. It provides valuable insight into how Delrin will behave under mechanical stress or wear. Delrin’s Shore hardness ensures that it is durable enough for a wide range of mechanical applications, from gaskets and seals to automotive components.
Summary of Mechanical Properties
In conclusion, the mechanical properties of Delrin make it an exceptional material for demanding applications requiring high strength, stiffness, wear resistance, and toughness. Its excellent tensile strength, yield strength, hardness, and impact resistance ensure that Delrin performs reliably in a variety of environments. These mechanical attributes, combined with its excellent dimensional stability and wear resistance, make Delrin a go-to material for a range of CNC machining and precision parts manufacturing. Whether you're manufacturing gears, bearings, automotive components, or electrical parts, Delrin provides the performance and durability required to meet rigorous operational standards.
Delrin Thermal Properties
Delrin (POM-H) is widely known for its excellent mechanical properties, but it also boasts impressive thermal characteristics that make it suitable for a broad range of applications in CNC machining and plastics manufacturing. These thermal properties are vital when selecting materials for parts that must operate in environments subject to temperature fluctuations, such as automotive, electronics, and industrial equipment. Below is a detailed look at Delrin's thermal properties and how they contribute to its performance in various applications.
Glass Transition Temperature (Tg)
The glass transition temperature of Delrin represents the point at which the polymer transitions from a hard, glassy material to a more rubber-like state. This transition is important because it indicates the temperature at which Delrin begins to soften and lose its rigidity. Delrin has a relatively high glass transition temperature, which ensures it maintains its strength and dimensional stability at moderate temperatures. This makes it a reliable material for parts that will be exposed to varying thermal conditions during use.
Melting Temperature
Delrin’s melting temperature is an important factor to consider when evaluating its suitability for high-temperature applications. The melting temperature of Delrin ranges between 175 - 180°C (347 - 356°F). This relatively high melting point ensures that Delrin can withstand moderate to high-temperature environments without deforming or losing its structural integrity, making it suitable for applications in industries such as automotive and industrial manufacturing, where parts may be exposed to heat.
Maximum Use Temperature
Delrin performs well under moderate temperatures, with a maximum use temperature range between 76.9°C and 96.9°C (170°F to 206°F). This means that Delrin can operate efficiently in environments with temperatures up to approximately 97°C. While Delrin is not suited for extremely high-temperature environments, it remains stable and functional in a wide range of common industrial and mechanical applications, such as gears, bearings, and electrical components, which require good performance at moderate heat levels.
Coefficient of Thermal Expansion
The coefficient of thermal expansion (CTE) of Delrin is between 75.7 - 202 × 10^-6 /°C, depending on the specific grade of the material. This property measures how much the material expands or contracts when exposed to changes in temperature. A low CTE value indicates that Delrin maintains its dimensional stability across temperature changes, making it a good choice for precision parts that need to maintain tight tolerances, such as machined components and automotive parts. Delrin's relatively low coefficient of thermal expansion helps prevent warping or distortion when subjected to heat fluctuations.
Thermal Conductivity
Delrin exhibits a thermal conductivity between 0.221 - 0.35 W/(m·°C), which means that it does not conduct heat as efficiently as metals but still performs well in many applications where heat resistance is required. Its low thermal conductivity helps in reducing the risk of overheating and allows it to maintain its strength and dimensional stability, even when exposed to moderate heat. This makes Delrin an excellent choice for parts that require insulation from heat, such as electrical components and housing materials for sensitive machinery.
Specific Heat
Delrin also has a relatively high specific heat capacity, which allows it to absorb and store heat energy. This property is important for parts that will experience fluctuating temperatures, as Delrin can absorb heat without undergoing significant temperature increases. The high specific heat capacity contributes to Delrin's ability to perform well in dynamic thermal environments, ensuring that it maintains its stability and mechanical properties even under thermal stress.
Coefficient of Thermal Expansion (Linear)
The linear coefficient of thermal expansion of Delrin, similar to the general CTE, describes how much the material will expand or contract in length with temperature variations. This property is critical in applications where parts are subjected to repeated thermal cycles. Delrin's linear thermal expansion coefficient ensures that it remains dimensionally stable when exposed to temperature fluctuations, making it a reliable material for precision engineering and automotive components that require consistent performance under varying heat conditions.
Summary of Thermal Properties
Delrin's thermal properties, including its glass transition temperature, melting temperature, maximum use temperature, and thermal conductivity, make it an ideal choice for many engineering and CNC machining applications. With its excellent thermal stability, low coefficient of thermal expansion, and good heat resistance, Delrin can be used in environments where parts are exposed to moderate temperatures. Its ability to absorb heat while maintaining its dimensional stability ensures reliable performance in mechanical components, gears, bearings, and electrical parts. Although Delrin may not be suitable for extreme high-temperature environments, it performs admirably in a wide range of applications where moderate to high temperatures are encountered.
These thermal properties, combined with Delrin's mechanical strength and wear resistance, make it a popular material choice for precision parts manufacturing and CNC machining services, particularly when thermal stability is critical to product performance.
Physical Properties of Delrin
Delrin (POM-H) is a highly versatile engineering plastic known for its superior mechanical, chemical, and physical properties. These characteristics make it suitable for a wide range of applications, including CNC machining and plastic parts manufacturing. Below is an overview of Delrin's physical properties, including its UV resistance, electrical properties, and other key attributes.
UV Resistance
One of the notable physical properties of Delrin is its UV resistance. While many plastics degrade when exposed to ultraviolet (UV) radiation, Delrin offers moderate UV resistance in its natural form. This means that Delrin parts can perform well in outdoor applications or environments with exposure to sunlight, without significant degradation in their mechanical properties. Over time, UV exposure can cause some surface discoloration, but Delrin maintains its strength and stability, making it a reliable material for parts in automotive, aerospace, and consumer electronics that require minimal exposure to UV light.
Electrical Properties of Delrin
Delrin’s electrical properties are crucial for its use in applications requiring electrical insulation and static control. Below are some of the key electrical properties of Delrin:
Other Properties
Delrin also possesses several other physical properties that enhance its performance in various CNC machining and plastics manufacturing applications. These properties include:
Summary of Physical Properties
The physical properties of Delrin—including its UV resistance, electrical insulating properties, hot water/alkali resistance, flammability, weather resistance, and low water absorption—make it a highly adaptable material for a wide range of applications. Delrin is particularly well-suited for industries such as automotive, electronics, aerospace, and medical devices, where these properties are essential to the reliability and durability of the components.
Delrin’s ESD safety and surface resistivity further enhance its suitability for electrical applications, ensuring safe operation in environments where static control is critical. With its robust physical characteristics, Delrin provides exceptional performance in environments where parts are exposed to UV light, high moisture, or extreme temperatures.
In addition, Delrin’s ability to resist water and alkali, along with its UL94 flammability rating, makes it ideal for use in challenging environments that require parts to withstand harsh chemicals, temperatures, or potential ignition hazards. This makes Delrin an excellent choice for CNC machining, plastic parts manufacturing, and precision engineering applications.
The cost of Delrin (POM-H) material can vary significantly depending on several factors, including the grade of Delrin, the quantity ordered, and the supplier or CNC machining service provider. Typically, Delrin is considered a premium engineering plastic due to its exceptional mechanical, chemical, and physical properties, which makes it more expensive than other standard plastics. However, the overall cost also depends on the application, material form (e.g., rods, sheets, or tubes), and the volume of the purchase. Here's a breakdown of the factors that influence the cost:
Factors Affecting the Cost of Delrin
1. Grade and Type of Delrin
Delrin comes in various grades, with each offering different enhancements or additives that can influence its performance in specific applications. Common grades include:
Each of these grades will have different prices, with glass-filled or PTFE-enhanced versions being more expensive due to their added strength and performance benefits.
2. Quantity Ordered
The more Delrin material you purchase, the lower the price per unit will generally be. Bulk orders or larger quantities, such as buying material in tons rather than kilograms or buying large sheets or rods, can significantly reduce the cost per unit. For instance, ordering several meters of Delrin sheet might cost less per meter than purchasing individual smaller pieces.
3. Form of Material
Delrin is available in several forms, and the price can fluctuate depending on the form required:
4. Supplier and Location
Pricing for Delrin material can also vary depending on the supplier and geographic location. Suppliers with a direct manufacturing facility may offer more competitive prices, while distributors or retail suppliers may charge a premium. Additionally, the cost of shipping and handling can add to the total price, especially for international orders.
Typical Price Ranges
To provide a rough estimate, here are some average price ranges for common forms of Delrin:
Cost of CNC Machining Delrin Parts
When CNC machining Delrin parts, the material cost will be added to the labor and machining costs. Machining costs depend on the complexity of the part, the type of CNC machining services (e.g., milling, turning, or drilling), and the time it takes to produce the part. Precision CNC machining may involve higher labor costs, and any post-processing (e.g., surface finishing or coating) will further increase the cost of production.
Factors to Consider for Cost-Effective Delrin Machining
Conclusion
The cost of Delrin material can vary from $10 to $60 per unit, depending on form, grade, and quantity. When factoring in CNC machining services, additional costs related to labor, equipment usage, and processing time should also be considered. While Delrin can be more expensive than other plastics, its superior properties make it a preferred choice for high-performance applications in industries like automotive, aerospace, and medical devices. For businesses seeking cost-effective solutions, ordering in bulk, choosing standard grades, and working with experienced CNC machining factories can help lower overall material and machining costs.
Delrin, also known as Polyoxymethylene (POM-H), is available in a variety of forms to suit different industrial and commercial applications. These include rods, tubes, and plates, each designed to meet specific requirements for mechanical strength, chemical resistance, and dimensional stability. Below, we break down the key details for each form of Delrin, providing insight into their typical sizes, tolerances, and weight, to help you choose the most suitable material type for your CNC machining needs.
Rods
Delrin rods are commonly used in CNC machining for producing parts such as gears, bearings, washers, and other components that require high dimensional accuracy and mechanical strength. These rods come in various diameters and lengths to accommodate a wide range of applications.
Sizes
Tolerances
Weight
Tubes
Delrin tubes are used in applications where hollow or cylindrical parts are required, such as piping, bushings, and protective casings. Tubes provide the versatility of using the material for structural and flow applications, and their geometry is essential for custom CNC machining processes.
Outer Diameter (OD)
Inner Diameter (ID)
Tolerances
Weight
Length
Plates
Delrin plates are used for applications where flat, large-area material is required for CNC machining, such as structural parts, seals, and bearing surfaces. Plates offer easy machining for parts that require large, uniform surfaces.
Thickness
Width
Tolerances
Weight
Length
Conclusion
Delrin material types—rods, tubes, and plates—offer a wide range of options for CNC machining, depending on the requirements of your specific project. Each form of Delrin comes with varying sizes, tolerances, and weights, ensuring that manufacturers can select the most appropriate material for their specific applications. Whether you need precise cylindrical components, flat, large-area surfaces, or custom-sized rods for machining, Delrin’s versatility and exceptional mechanical properties make it an ideal choice for various industrial applications, from automotive parts to medical devices. Always ensure that you choose the correct type and specifications to meet your CNC machining and material needs efficiently.
Here’s the information you provided in a table format for easier reference and clarity:
| Material Type |
Details |
| Rods | |
| Sizes (mm) |
Diameters range from 5 mm to 300 mm. Lengths typically range from 500 mm to 3000 mm. |
| Tolerances |
Min Tolerance: ±0.05 mm Max Tolerance: ±0.1 mm |
| Weight (kg/m) |
10 mm diameter rod: ~0.075 kg/m 100 mm diameter rod: ~3.5 kg/m |
| Tubes |
|
| Outer Diameter (OD) |
Ranges from 10 mm to 200 mm. |
| Inner Diameter (ID) |
Ranges from 5 mm to 150 mm. |
| Tolerances |
Min Tolerance (ID): ±0.05 mm Max Tolerance (ID): ±0.15 mm Min Tolerance (OD): ±0.05 mm Max Tolerance (OD): ±0.1 mm |
| Weight (kg/m) |
10 mm OD: ~0.1 kg/m 200 mm OD: ~3.2 kg/m |
| Length (mm) |
Typically 1000 mm to 3000 mm. Custom lengths are available. |
| Plates |
|
| Thickness (mm) |
Available in 2 mm to 100 mm thickness. |
| Width (mm) |
Typically from 100 mm to 1000 mm, with custom widths available. |
| Tolerances |
Min Tolerance: ±0.1 mm Max Tolerance: ±0.5 mm |
| Weight (kg/m²) |
10 mm thickness plate: ~5 kg/m² 50 mm thickness plate: ~25 kg/m² |
| Length (mm) |
Typically 1000 mm to 3000 mm, custom lengths are available. |
This table layout provides a clean overview of the Delrin material types (rods, tubes, and plates) with key details on their dimensions, tolerances, weight, and length options. You can refer to it for a quick, side-by-side comparison of Delrin material forms to make more informed decisions based on your CNC machining needs.
When it comes to machining Delrin (POM-H), the surface finish plays a crucial role in determining the part's performance, durability, and aesthetics. The appropriate surface finish can depend on the specific application and the manufacturing process used. Here are the key considerations for achieving the right surface finish for Delrin parts:
1. Polished Finish
2. Machined Finish
3. Matte or Satin Finish
4. Textured Finish
5. Smooth Finish for Tight Tolerances
Surface Finish Requirements for Delrin Applications
Conclusion:
Choosing the right surface finish for Delrin CNC machining parts largely depends on the end-use application. For functional mechanical parts, a machined finish or matte finish is usually sufficient, while polished finishes are more suitable for aesthetic or precision parts. Always consider the part's environmental exposure (e.g., chemical resistance, UV stability) and its interaction with other components when selecting the surface finish.
When machining large Delrin parts, maintaining tight geometric tolerances is critical for ensuring the functionality, performance, and fit of the final product. Delrin (POM-H) offers excellent dimensional stability, which is essential for parts that need precise geometric control, especially when they are subjected to mechanical stress, wear, and high temperatures. However, because Delrin is a plastic material, the tolerances achievable are different from those of metals like steel or aluminum.
Here are the geometric tolerances for large Delrin CNC machining parts, broken down by different factors:
1. Linear Tolerances (Length, Width, Height)
Factors Affecting Tolerances:
Best Practices: For large parts, it is essential to account for the thermal expansion of Delrin during machining. As the material heats up, it may slightly expand, which can affect the final dimensions. A cooling period after machining or temperature-controlled environments may be needed for optimal results.
2. Roundness and Cylindricity
Typical Tolerances:
Factors Affecting Tolerances:
3. Flatness
Factors Affecting Tolerances:
4. Parallelism
Factors Affecting Tolerances:
5. Perpendicularity
Factors Affecting Tolerances:
6. Surface Finish and Texture
Factors Affecting Tolerances:
7. Hole Sizes and Positioning
Factors Affecting Tolerances:
8. Angularity
Factors Affecting Tolerances:
Conclusion
The geometric tolerances achievable for large Delrin CNC machining parts depend on the specific application, machine setup, and machining method used. Linear tolerances are typically around ±0.1 mm to ±0.25 mm, while other tolerances such as roundness, flatness, and perpendicularity can vary from ±0.1 mm to ±0.5 mm. When working with large Delrin parts, it is essential to account for the material's potential to deform under machining stresses and the need for temperature-controlled environments during and after machining. By selecting the right processes and tools, achieving tight geometric tolerances in Delrin is entirely feasible, ensuring parts that are both functional and precise.
The cost of machining a Delrin part can vary widely depending on several factors, including the part's size, complexity, quantity, tolerances, and finish requirements. Delrin, also known as POM-H (Polyoxymethylene), is a high-performance plastic with a range of beneficial properties, including excellent dimensional stability, high strength, and low friction. These properties make it an excellent material for CNC machining, but they also affect the overall cost of production.
To better understand the pricing, let’s break down the different factors that influence the cost of machining Delrin parts.
1. Part Size and Complexity
2. Quantity
3. Tolerances and Finish
4. Machining Method
5. Material Cost
The cost of Delrin material itself can also vary. Typically, Delrin rod stock or Delrin sheet costs between $10 to $50 per kilogram, depending on the type and supplier. Larger parts or complex geometries may result in more material waste, adding to the total cost.
6. Setup and Tooling Costs
7. Additional Factors
Typical Cost Breakdown for Delrin CNC Machining:
Conclusion
The cost of machining a Delrin part depends on factors such as the size, complexity, quantity, and tolerance requirements. For small and simple parts, costs can be relatively low, ranging from $5 to $50 per part. However, for large, complex parts or low-volume production, the cost can rise significantly, from $100 to $500 or more per part. To get an accurate quote, it's best to consult with a CNC machining service provider who can assess the specific details of your part and production requirements.
When it comes to precision plastic parts, Delrin (POM-H) stands out as a top choice for CNC machining. As a high-performance acetal homopolymer, Delrin offers an ideal balance of strength, stability, and machinability, making it highly sought after across a wide range of industries. In fact, many CNC machining factories prefer Delrin for creating complex, tight-tolerance parts that need to perform reliably under demanding conditions. Let's dive deeper into why Delrin CNC machining parts are such an excellent solution.
Durable and Holds Its Shape Well
One of Delrin’s primary strengths is its exceptional dimensional stability. Unlike many other plastics, Delrin does not warp easily during machining or after prolonged use. This stability ensures that plastic CNC machining parts made from Delrin maintain their precise shapes even under mechanical stress, heat, or long-term load. Whether used in mechanical gears, automotive components, or precision fixtures, Delrin’s ability to maintain tight tolerances makes it invaluable for industries requiring absolute reliability.
Withstands Shock and Pressure Without Breaking
Delrin exhibits excellent impact resistance and fatigue endurance, allowing it to absorb mechanical shocks without cracking or failing. This resilience makes it perfect for parts like bushings, bearings, and structural components that undergo repeated mechanical loading. Even in high-pressure applications, POM-H CNC machining parts crafted from Delrin continue to perform consistently without sudden breakage, offering peace of mind in critical-use cases.
Resists Damage from Chemicals
Chemical resistance is another major advantage. Delrin withstands a wide range of chemicals, including fuels, solvents, and neutral chemicals, without degrading. This property is especially valuable in automotive, aerospace, and industrial applications where exposure to aggressive fluids is common. CNC machining services often recommend Delrin when clients need parts that can survive in harsh chemical environments without losing functionality.
Smooth and Shiny Surface
Thanks to its fine molecular structure, Delrin naturally achieves a smooth, glossy surface finish when machined. This characteristic not only improves aesthetics but also enhances performance in applications where low friction and easy cleaning are necessary. Additionally, the superior surface quality reduces the need for extensive post-processing, which saves time and production costs.
Low Friction, Easy to Machine
Delrin’s low coefficient of friction makes it an ideal choice for sliding or rotating applications, such as gears, rollers, and sliding pads. It moves easily against other materials without excessive wear. Moreover, Delrin is relatively easy to machine compared to metals and some other engineering plastics. It cuts cleanly with minimal burring, resulting in faster turnaround times and lower machining costs, a big advantage for CNC machining factories aiming for efficiency and precision.
Safe for Food and Water in Many Cases (FDA and NSF Approved)
Certain grades of Delrin are FDA and NSF certified for food and potable water contact, making it suitable for manufacturing components in food processing equipment, beverage dispensers, and kitchen appliances. Clients in the medical, food, and water industries often choose Delrin when they require plastic CNC machining parts that meet strict hygiene and safety standards.
Can Replace Metal Parts Made by Die Casting
Delrin offers the strength and mechanical stability to replace metal components in many applications while significantly reducing weight. For instance, Delrin is often used instead of zinc, brass, or aluminum die-cast parts. Substituting metal with Delrin can lead to lower production costs, easier handling, and improved corrosion resistance. This metal-replacement capability makes Delrin CNC machining parts highly attractive for industries seeking cost-effective, lightweight, and durable solutions.
By leveraging the outstanding properties of Delrin, CNC machining services can produce parts that are not only high-performing but also highly economical, providing real advantages to industries ranging from automotive to medical devices.
While Delrin (POM-H) is widely valued for its excellent mechanical properties and machining advantages, like any material, it also comes with certain limitations that customers should be aware of before selecting it for plastic CNC machining parts. Understanding these potential drawbacks will help you make more informed decisions when working with CNC machining services and ensure that Delrin is the right fit for your project’s environment and performance requirements.
Difficult to Adhere or Stick to Other Materials
One major drawback of Delrin is its poor adhesion properties. Due to its low surface energy, it is extremely difficult to bond Delrin to itself or to other materials using conventional adhesives. Special surface treatments or adhesives formulated specifically for acetal materials are required to achieve a strong bond, adding complexity and cost to assembly processes. For projects where gluing or bonding is critical, CNC machining factories often recommend alternative materials unless proper bonding techniques are available.
Not Resistant to Acids and Alkalis
Although Delrin offers impressive resistance to fuels, oils, and many solvents, it has limited resistance to strong acids and alkalis. Prolonged exposure to harsh chemical environments—such as acidic cleaners or alkaline solutions—can degrade Delrin, leading to part failure or reduced lifespan. If your application involves aggressive chemical exposure, it’s essential to consult your CNC machining services provider for material alternatives that can better withstand such conditions.
May Decompose in Sunlight, Release Gas at High Temperatures
Delrin is sensitive to UV radiation and high temperatures. Extended exposure to direct sunlight can cause the material to degrade, leading to discoloration, brittleness, and a significant loss in mechanical properties. Additionally, at very high temperatures (typically above its safe use limit of around 90°C), Delrin can release formaldehyde gas, which can be hazardous in enclosed spaces. This makes POM-H CNC machining parts less suitable for outdoor or high-temperature applications unless UV-stabilized or heat-resistant grades are specifically chosen.
Becomes Brittle in Extreme Cold Conditions
While Delrin retains toughness at moderately low temperatures, it can become brittle under extreme cold (far below -40°C). This brittleness may lead to sudden cracking or breakage if parts are subjected to impacts at such low temperatures. For applications in cryogenic environments or consistently freezing conditions, other plastics like PTFE or metals may be better suited.
Overall, while Delrin CNC machining parts offer many advantages, it is critical to carefully assess the operating environment and application needs to avoid these potential disadvantages. Choosing the right material from trusted CNC machining factories ensures better performance, safety, and cost-efficiency in the long run.
Although Delrin (POM-H) is an outstanding engineering plastic known for its strength, stability, and ease of machining, it does have certain design limitations that customers and engineers must consider when developing plastic CNC machining parts. Understanding these limitations will help ensure your project’s success and allow you to maximize the advantages of working with CNC machining services and CNC machining factories.
Thickness and Warping Issues
Delrin maintains excellent dimensional stability for small to medium-sized parts, but when designing large, thick, or bulky parts, warping and internal stress can become problems. Delrin tends to shrink slightly as it cools after machining or molding, and if the part is too thick, uneven shrinkage may occur, leading to warping or deformation. To avoid these issues, it is recommended to use uniform wall thicknesses and limit the maximum thickness whenever possible.
Sharp Corners and Stress Concentration
When designing Delrin CNC machining parts, it's important to avoid sharp internal corners. Sharp corners can create stress concentration points that increase the risk of cracking or premature failure under load. A best practice is to incorporate generous fillets or radii at all internal transitions to distribute stress more evenly and enhance the overall strength and durability of the part.
Limited Surface Textures and Finishes
Due to Delrin’s naturally slick, low-friction surface, achieving very rough or highly textured finishes can be challenging. While it’s perfect for applications requiring smooth movement (such as gears and bearings), if your design demands rough textures for grip or adhesion, Delrin may not be the most suitable choice. Surface modifications like sandblasting or texturing can be attempted, but the results may not be as effective compared to other plastics.
Limitations in Bonding and Assembly
Since Delrin is difficult to bond with adhesives, parts that require glued joints must be carefully re-evaluated during the design phase. Mechanical fastening methods—such as press fits, snap fits, screws, or welding (specialized techniques)—are often necessary. If adhesive bonding is unavoidable, special surface preparation methods or dedicated adhesives for acetal resins must be specified.
Sensitivity to UV and Extreme Environments
Designers must also consider Delrin’s poor UV resistance and limited temperature range when specifying parts for outdoor or extreme environmental conditions. Without UV stabilization additives, Delrin parts exposed to sunlight will degrade over time. Similarly, high-temperature applications (beyond 90°C) or extreme cold (below -40°C) may compromise the material’s performance.
In short, while Delrin (POM-H) is a fantastic choice for many precision applications, careful design consideration is necessary to address its inherent material limitations. Partnering with experienced CNC machining services providers ensures your Delrin parts are designed and manufactured to achieve optimal performance.
When selecting a material for high-performance applications, especially when it comes to plastic CNC machining parts, Delrin (POM-H) stands out for a variety of compelling reasons. Whether you're working with POM-H CNC machining parts, replacing metal components, or needing precision and durability, Delrin often becomes the material of choice. Let’s break down exactly why Delrin is preferred across many industries.
Delrin Plastic vs. Metal
One of the biggest advantages of Delrin is its ability to replace metal parts without compromising strength or functionality. Delrin exhibits high mechanical strength, excellent wear resistance, and low friction, making it an ideal alternative to metals like aluminum, brass, or mild steel in many applications. Moreover, Delrin is lightweight, offering significant weight savings without losing toughness. Its corrosion resistance also means that Delrin parts will not rust, which is particularly valuable in humid, wet, or chemically exposed environments.
In CNC machining, Delrin is easier and faster to machine compared to metals. It reduces tool wear and allows for higher-speed machining, which can lead to lower production costs. This advantage is particularly attractive for companies looking to produce precision components efficiently with the help of professional CNC machining services or CNC machining factories.
Delrin Plastic vs. Other Plastics
When compared to other engineering plastics like Nylon, ABS, or even PTFE, Delrin demonstrates superior dimensional stability and higher mechanical strength. Unlike Nylon, Delrin absorbs very little moisture, ensuring that the parts retain their shape and performance even in moist environments. Compared to PTFE (Teflon), Delrin offers better structural strength and easier machinability while maintaining low friction characteristics.
Delrin's ability to maintain tight tolerances makes it especially valuable for precision CNC machining applications where accuracy is critical. Its fatigue resistance and creep resistance over time ensure long service life, even in components that are subjected to repetitive mechanical stress.
In Summary
If your project demands a material that is strong, durable, chemically resistant, lightweight, and easy to machine, then Delrin should be at the top of your list. Its unmatched balance between performance and machinability makes it a favorite in the automotive, electronics, medical, and industrial sectors. For anyone sourcing reliable Delrin CNC machining parts, partnering with skilled CNC machining factories can guarantee exceptional part quality, fast turnaround times, and long-term performance.
Selecting the correct Delrin (POM-H) grade is essential for achieving optimal performance in your plastic CNC machining parts. With several variants available, each with its own unique properties, understanding the differences helps you make the best choice for your specific application. Whether you need parts with low friction, added strength, or enhanced wear resistance, the right Delrin material can make a significant difference in quality and durability.
Different Types of Delrin and Their Best Uses:
Delrin AF 100 (13% PTFE filled)
Delrin AF 100 is blended with about 13% PTFE (polytetrafluoroethylene), giving it extremely low friction and excellent wear resistance. This grade is ideal for applications like sliding bearings, bushings, and other components where reduced friction and high performance are critical. If your project requires plastic CNC machining parts that must operate smoothly under load with minimal maintenance, Delrin AF 100 is a strong candidate.
Delrin (30% Glass Filled)
For applications demanding higher strength and rigidity, 30% glass-filled Delrin is an excellent choice. The added glass fibers significantly boost stiffness, dimensional stability, and creep resistance, making it suitable for structural components subjected to heavy mechanical loads. However, it's slightly less impact-resistant than unfilled grades. When working with POM-H CNC machining parts in industries like automotive or heavy machinery, glass-filled Delrin provides enhanced performance.
Delrin AFDE588
Delrin AFDE588 combines the benefits of PTFE and other proprietary fillers, offering exceptionally low friction, outstanding wear resistance, and excellent machinability. It's often used in high-load, high-wear environments and can extend the lifespan of parts that would otherwise fail due to friction or heat buildup. For Delrin CNC machining parts that need a perfect balance between wear resistance and mechanical strength, AFDE588 is a premium choice.
Delrin 570 (20% Glass Filled)
Delrin 570 contains 20% glass fibers, providing a good compromise between improved strength and impact resistance. It maintains many of the standard Delrin properties, like low moisture absorption and excellent machinability, while offering better rigidity than unfilled grades. It’s a strong option for automotive, aerospace, and industrial components where lightweight strength is crucial.
Delrin 150 Homopolymer (Black and Natural)
This is the standard, unfilled Delrin grade available in both black and natural (white) colors. Delrin 150 offers the best combination of toughness, fatigue resistance, and chemical resistance for general-purpose applications. It's widely used for gears, bearings, and fittings in various industries. If you need reliable CNC machining services for standard parts with excellent durability and machinability, Delrin 150 is the go-to option.
In Summary:
Choosing the right Delrin material depends heavily on your application's mechanical, thermal, and chemical demands. Consulting with experienced CNC machining factories like VMT ensures you select the most appropriate grade, optimize performance, and achieve cost-effective production of your Delrin CNC machining parts.
When it comes to sourcing high-quality Delrin CNC machining parts, choosing the right manufacturing partner is crucial. VMT stands out among CNC machining factories by delivering precision, efficiency, and reliability with every project. We specialize in plastic CNC machining parts, including those made from Delrin (POM-H), and have extensive experience tailoring solutions to meet the unique requirements of various industries.
At VMT, we understand that different Delrin (POM-H) grades perform differently under specific conditions. Our engineering team works closely with you to recommend the most suitable material based on your project's mechanical, chemical, and environmental needs. Whether you need POM-H CNC machining parts that offer superior wear resistance, dimensional stability, or impact strength, we can produce parts with tight tolerances and impeccable finishes.
Our facility is equipped with advanced CNC machining services that include multi-axis milling, turning, and finishing operations. These capabilities allow us to handle everything from simple components to complex geometries without sacrificing precision or quality. Moreover, our quality assurance process ensures that every part meets strict dimensional and material standards, providing you with peace of mind and consistent results.
Partnering with VMT means benefiting from:
If you're looking for a trusted provider for your next project, VMT’s professional team is ready to bring your vision to life with unmatched craftsmanship and service.
Contact VMT today to learn more about how we can support your needs for CNC machining services with the highest standards in the industry!
Delrin (POM-H) has proven itself as one of the most versatile and reliable materials for a wide range of manufacturing needs. With its outstanding mechanical, thermal, and chemical properties, it offers an ideal solution for applications requiring precision, durability, and excellent performance under challenging conditions. Whether used in automotive components, medical devices, mechanical gears, or electronic connectors, Delrin consistently delivers high-quality results.
Through various manufacturing methods such as Delrin CNC machining, injection molding, and even 3D printing, industries can harness the full potential of this engineering plastic. With the help of experienced CNC machining factories like VMT, you can ensure that your plastic CNC machining parts, especially POM-H CNC machining parts, meet tight tolerances, achieve excellent surface finishes, and are optimized for your specific functional needs.
While Delrin does have some limitations—such as poor adhesion to other materials and sensitivity to UV and certain chemicals—its overall advantages far outweigh the downsides when properly applied. Understanding its properties, machining techniques, and material variations can help you make smarter design and manufacturing decisions.
At VMT, we pride ourselves on delivering exceptional CNC machining services with a strong emphasis on material knowledge, process expertise, and customer satisfaction. Whether you need custom Delrin CNC machining parts or guidance on material selection and part design, our team is ready to support you every step of the way.
Choosing the right partner makes all the difference in project success. Trust VMT for your next Delrin project and experience precision, reliability, and service excellence tailored to your needs.
What type of plastic is Delrin?
Delrin is an acetal homopolymer plastic, technically known as polyoxymethylene (POM-H). It is a high-performance engineering thermoplastic known for its excellent mechanical strength, dimensional stability, low friction, and chemical resistance. Delrin is often used for precision parts that require high stiffness, low wear, and long-term durability. Thanks to its strong performance characteristics, Delrin is widely applied across automotive, aerospace, electronics, medical, and industrial sectors. It is a popular choice for plastic CNC machining parts because it offers machinability similar to metals while maintaining the benefits of plastic.
What is Delrin 150?
Delrin 150 is a standard grade of Delrin homopolymer resin, known for its exceptional mechanical strength, toughness, and fatigue resistance. It is often supplied in both natural (white) and black colors. Delrin 150 is widely used for POM-H CNC machining parts like gears, bearings, bushings, and fittings. Compared to other plastics, it maintains better performance under mechanical stress and repetitive motion. Many industries select Delrin 150 because it offers a perfect balance of strength, machinability, and cost-effectiveness, making it ideal for CNC machining services.
Are there different types of Delrin?
Yes, Delrin is available in several specialized types depending on the application's demands. Apart from standard Delrin 150, there are filled grades like Delrin AF (with PTFE for lower friction), Delrin 570 (glass-filled for higher stiffness), and Delrin blends modified for enhanced properties. Each variant offers distinct benefits such as improved wear resistance, strength, or reduced friction. Choosing the right Delrin type ensures that your Delrin CNC machining parts meet performance requirements in strength, chemical resistance, or precision.
What is another name for POM plastic?
Another common name for POM plastic is "acetal." Acetal plastics include both homopolymer (Delrin) and copolymer forms (POM-C). When people refer to Delrin specifically, they are often talking about the POM-H (homopolymer) version, while POM generally can also refer to copolymers. Acetal is prized for its strength, machinability, and moisture resistance, making it a staple material for CNC machining factories producing components for automotive, mechanical, and consumer industries.
What is the difference between Delrin and POM?
Delrin is the brand name for the homopolymer form of POM (polyoxymethylene) developed by DuPont. POM, in general, refers to a family of thermoplastics that can either be homopolymers (like Delrin) or copolymers (like POM-C). Delrin offers higher mechanical strength and better fatigue resistance, while POM-C has better chemical resistance and thermal stability. When choosing between the two for CNC machining services, it depends on whether your priority is mechanical performance (Delrin) or chemical/environmental resistance (POM-C).
What is the best way to join Delrin parts?
Joining Delrin parts can be challenging because of its low surface energy, which resists adhesives. Mechanical fastening (such as screws, bolts, or press fits) is the most reliable method. Heat staking, ultrasonic welding, or specialized adhesives like cyanoacrylate (super glue) can sometimes work with proper surface preparation. In plastic CNC machining parts, designers often incorporate mechanical fastening features during the design stage to ensure robust assembly.
What is the difference between POM and POM-H?
POM refers broadly to polyoxymethylene plastics, while POM-H specifically refers to the homopolymer version (like Delrin). POM-H provides higher strength, stiffness, and fatigue resistance but is slightly less resistant to hot water and strong chemicals compared to POM-C (copolymer). When selecting materials for POM-H CNC machining parts, POM-H is ideal for mechanical applications demanding high strength, while POM-C is often better for chemical environments.
What are the alternative names for Delrin?
Alternative names for Delrin include acetal homopolymer, POM-H, and acetal resin. Some competitors produce similar homopolymer materials under different trade names, but "Delrin" remains the most recognized and trusted brand for high-performance plastic CNC machining parts. It’s important to verify the type and manufacturer when selecting Delrin material for critical applications to ensure consistent quality and performance.
Is Delrin the same as HDPE?
No, Delrin and HDPE (High-Density Polyethylene) are two different plastics. Delrin is much harder, stronger, and offers better dimensional stability than HDPE. HDPE is softer, more flexible, and primarily used for containers, piping, and lightweight structural applications. In precision manufacturing, Delrin CNC machining parts are preferred when mechanical strength, tight tolerances, and wear resistance are crucial, whereas HDPE is chosen when chemical resistance and cost are the primary factors.
What plastic is similar to Delrin?
Acetal copolymer (POM-C) is the most similar plastic to Delrin in terms of mechanical properties. Other plastics like nylon (PA) or UHMW (Ultra High Molecular Weight Polyethylene) can offer comparable low friction or wear resistance but usually lack the same dimensional precision and stiffness. For parts needing tight tolerances and high fatigue resistance in plastic CNC machining parts, Delrin or acetal copolymer remains the best choice.
How to identify POM plastic?
POM plastics can be identified through their smooth, glossy surface, high stiffness, and slight resistance to scratching. In laboratory tests, a burn test showing a blue flame with yellow edges and a formaldehyde smell can confirm POM. In CNC machining factories, professionals often rely on documentation and testing to ensure the correct material is used, especially when high-performance properties are required.
What is POM made of?
POM is produced through the polymerization of formaldehyde. Depending on the process, manufacturers can create homopolymer (POM-H, like Delrin) or copolymer (POM-C) versions. The result is a crystalline plastic material prized for its mechanical strength, low friction, and excellent fatigue resistance, making it ideal for parts made through CNC machining services.
What is the brand name of Delrin?
Delrin is a registered trademark owned by DuPont (now part of DuPont de Nemours, Inc.). It is the most recognized brand for POM-H (homopolymer acetal) plastic. When specifying materials for Delrin CNC machining parts, using branded Delrin ensures that you receive consistent mechanical and chemical properties aligned with industry standards.
Is Delrin the same as UHMW?
No, Delrin and UHMW (Ultra High Molecular Weight Polyethylene) are different materials. Delrin offers superior rigidity, dimensional stability, and wear resistance compared to UHMW, which is softer, more flexible, and highly resistant to abrasion and chemical exposure. When selecting materials for plastic CNC machining parts, Delrin is often preferred when precise machining and high strength are needed.
What is stronger than Delrin?
Materials like polyether ether ketone (PEEK) and certain high-performance composites are stronger than Delrin, especially at higher temperatures or in more demanding environments. However, Delrin strikes an excellent balance between cost, machinability, and mechanical performance, making it ideal for most POM-H CNC machining parts unless extremely high-performance requirements dictate otherwise.
Is Delrin POM-C or POM-H?
Delrin specifically refers to the homopolymer form (POM-H) of polyoxymethylene. It has superior strength and fatigue resistance compared to POM-C (copolymer), making it the preferred material for applications requiring mechanical durability and precision, particularly when producing Delrin CNC machining parts.
Why is Delrin so expensive?
Delrin is more expensive than many other plastics due to its complex manufacturing process, precise polymerization requirements, and superior mechanical properties. The cost also reflects its excellent performance in demanding applications, justifying its use in high-value, high-precision plastic CNC machining parts.
Does Delrin break easily?
No, Delrin does not break easily under normal conditions. It is designed to be tough, durable, and resistant to fatigue. However, extreme conditions such as UV exposure, very high temperatures, or exposure to strong acids can weaken it over time. When properly designed and used, Delrin offers outstanding long-term reliability in POM-H CNC machining parts.
Is POM the same as nylon?
No, POM and nylon (PA) are different types of engineering plastics. While both offer good strength and wear resistance, Delrin (POM-H) provides better dimensional stability, lower moisture absorption, and higher fatigue resistance compared to nylon. For critical precision parts produced through CNC machining services, Delrin is often a better choice when accuracy and long-term performance are key.
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