Acetal (Delrin)

Acetal, also known as Delrin, is a high-performance thermoplastic polymer that is well-suited for a variety of machining processes, including CNC turning, Swiss lathe machining, CNC milling, and automatic lathe operations. Its excellent machinability, combined with its desirable mechanical properties, makes it widely used for manufacturing components across various industries.

In CNC turning, Acetal’s excellent dimensional stability and low coefficient of friction allow for smooth cutting and precise shaping of intricate designs. Its ability to maintain tight tolerances and produce high-quality surface finishes makes it suitable for producing precision components such as gears, bushings, and fittings.

Similarly, in Swiss lathe machining, Acetal’s stability and ease of machining enable the production of complex and precise components with tight tolerances. Its resistance to deformation and minimal tool wear contribute to efficient and cost-effective manufacturing processes.

CNC milling operations benefit from Acetal’s high strength, stiffness, and resistance to wear, allowing for the creation of durable components with intricate geometries and precise details. Its low moisture absorption and dimensional stability ensure consistent performance in various milling applications.

Acetal (Delrin) Datasheet (General Overview)

Chemical Composition:

Polymer Type: Polyoxymethylene (POM)
Common Brand Name: Delrin

Physical Properties:

Density: 1.41 g/cm³
Melting Point: 165-175°C (329-347°F)
Glass Transition Temperature (Tg): -50°C (-58°F)
Water Absorption (24 hours): < 0.25%

Mechanical Properties:

Property	Value
Tensile Strength	55-70 MPa (8000-10150 psi)
Yield Strength	68-86 MPa (9850-12470 psi)
Elongation at Break	10-50%
Flexural Modulus	2.5-3.2 GPa (362,600-464,100 psi)
Hardness (Rockwell M)	82

Thermal Properties:

Coefficient of Thermal Expansion: 80-110 x 10^(-6) /°C
Heat Deflection Temperature (HDT): 95°C (203°F) at 0.46 MPa (66 psi)
Specific Heat: 1.45 J/(g·K)

Electrical Properties:

Dielectric Constant (at 1 MHz): 3.7
Volume Resistivity: > 10^15 ohm·cm

Processing Properties:

Melt Flow Rate: 4-8 g/10 min (Condition 190°C/2.16 kg)
Processing Temperature Range: 190-220°C (374-428°F)

Chemical Resistance:

Resistant to a wide range of chemicals, solvents, and oils.
Sensitive to strong acids and bases.

UV Resistance:

Fair resistance to UV radiation. Extended exposure may lead to degradation.

Features:

Low friction and excellent wear resistance.
Good dimensional stability and machinability.
Self-lubricating properties.
Low moisture absorption.

Applications:

Gears, bearings, and other precision components.
Automotive parts such as fuel system components and door handles.
Electrical insulators and connectors.
Medical devices and equipment.
Consumer goods like zippers, toys, and kitchenware.

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Common Used Acetal (Delrin) at MFG SOLUTION

At MFG SOLUTION, commonly used Acetal (Delrin) grades are selected based on their specific properties and suitability for various manufacturing processes and applications. Some popular Acetal (Delrin) grades frequently utilized at MFG SOLUTION include:

Delrin® 500: Delrin® 500 is a general-purpose grade of Acetal that offers a balance of mechanical properties, including high strength, stiffness, and dimensional stability. It is well-suited for a wide range of applications, from precision components to structural parts, where durability and reliability are paramount.
Delrin® 100: Delrin® 100 is a low-friction grade of Acetal that provides enhanced wear resistance and reduced coefficient of friction compared to standard grades. It is commonly used in applications requiring smooth operation, such as gears, bearings, and sliding components.
Delrin® AF: Delrin® AF (Acetal with PTFE filler) combines the excellent mechanical properties of Acetal with the low friction and wear resistance of PTFE (polytetrafluoroethylene). This grade is often chosen for applications requiring self-lubricating properties and reduced friction, such as bushings, thrust washers, and seals.
Delrin® 570: Delrin® 570 is a high-viscosity grade of Acetal that offers improved thermal stability and chemical resistance compared to standard grades. It is suitable for applications exposed to elevated temperatures or harsh chemical environments, such as automotive under-the-hood components and chemical processing equipment.
Delrin® ESD: Delrin® ESD (Electrostatic Dissipative) is a specialty grade of Acetal engineered to dissipate static electricity, making it suitable for applications in electronics, telecommunications, and semiconductor manufacturing where electrostatic discharge (ESD) control is critical.

What Types of Parts Should Consider Acetal (Delrin) Plastic ?

Acetal (Delrin) plastic is suitable for a wide range of parts across various industries due to its excellent mechanical properties, dimensional stability, chemical resistance, and machinability. Here are some types of parts that are commonly made from Acetal (Delrin) plastic:

Precision Mechanical Components: Acetal (Delrin) is widely used for manufacturing precision mechanical components such as gears, bearings, bushings, and rollers. Its low coefficient of friction, high strength, and wear resistance make it ideal for applications requiring smooth operation and long service life, such as in machinery, automotive transmissions, and conveyor systems.
Electrical and Electronic Components: Acetal (Delrin) is commonly used in the production of electrical and electronic components such as insulators, connectors, housings, and switches. Its excellent dielectric properties, dimensional stability, and resistance to moisture and chemicals make it suitable for applications in electrical enclosures, circuit boards, and telecommunications equipment.
Fluid Handling Components: Acetal (Delrin) is used for manufacturing fluid handling components such as valves, fittings, couplings, and pump parts. Its resistance to chemicals, solvents, and hydrocarbons, combined with its low moisture absorption and dimensional stability, make it suitable for applications in plumbing, automotive fuel systems, and medical devices.
Automotive Components: Acetal (Delrin) is employed in various automotive components such as bushings, clips, brackets, and interior trim parts. Its high strength, stiffness, and impact resistance, along with its ability to withstand temperature fluctuations and exposure to automotive fluids, make it suitable for demanding automotive applications.
Consumer Goods: Acetal (Delrin) is used in a wide range of consumer goods such as zippers, fasteners, handles, and toys. Its smooth surface finish, durability, and ease of machining allow for the production of aesthetically pleasing and functional components for everyday use.
Medical and Healthcare Devices: Acetal (Delrin) is utilized in medical and healthcare devices such as surgical instruments, orthopedic implants, and dental components. Its biocompatibility, resistance to sterilization methods, and dimensional stability make it suitable for applications requiring strict regulatory compliance and reliability.

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Acetal (Delrin) Plastic VS ABS Plastic

Acetal (Delrin) and ABS (Acrylonitrile Butadiene Styrene) are two widely used thermoplastic polymers, each offering distinct properties and advantages suited to different applications. Here’s a comparison between Acetal (Delrin) and ABS plastic:

Acetal (Delrin):

Mechanical Properties: Acetal (Delrin) is known for its excellent mechanical properties, including high strength, stiffness, and hardness. It has a high tensile strength and can withstand repeated impact and stress without deforming or breaking. These properties make it ideal for applications requiring strength and durability, such as gears, bearings, and mechanical components.
Dimensional Stability: Acetal (Delrin) exhibits exceptional dimensional stability, maintaining its shape and size even when exposed to changes in temperature, humidity, or chemical environments. This property makes it suitable for applications where tight tolerances and precise dimensions are critical.
Chemical Resistance: Acetal (Delrin) has good resistance to chemicals, solvents, oils, and greases, making it suitable for applications exposed to harsh environments or corrosive substances.
Machinability: Acetal (Delrin) is highly machinable, allowing for easy cutting, milling, turning, and drilling operations. It produces clean edges and smooth surfaces with minimal tool wear, making it a preferred material for precision machining processes.

ABS (Acrylonitrile Butadiene Styrene):

Impact Resistance: ABS plastic is known for its excellent impact resistance, able to withstand sudden shocks or impacts without breaking or shattering. This property makes it suitable for applications requiring toughness and resilience, such as automotive parts, protective gear, and consumer electronics housings.
Surface Finish: ABS plastic has good surface finish properties, allowing for easy painting, plating, or printing to achieve desired colors, textures, or designs. It can be easily molded into complex shapes with intricate details, making it suitable for aesthetically demanding applications.
Cost-Effectiveness: ABS plastic is cost-effective compared to some other engineering plastics, making it a popular choice for mass-produced consumer goods, toys, and household items.
Thermal Properties: ABS plastic has moderate heat resistance but may soften or deform at high temperatures. It is not suitable for applications requiring high-temperature resistance or prolonged exposure to elevated temperatures.

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Who we are?

Established in 2012, MFG SOLUTION has been devoted to manufacturing small, custom precision machined parts. Our services encompass CNC machining, 5-axis CNC machining, CNC turning, Swiss-type lathe machining, cold forging, compression molding, silicone molding, and sheet metal fabrication. With a robust infrastructure including 5 sets of 5-axis CNC machines, 16 sets of 3-axis CNC machines, 20 automatic lathes, 18 CNC turning machines, 42 sets of cold heading and thread rolling equipment, along with other specialized tools, we possess the capability to fulfill diverse industry requirements. Supported by a team of over 60 engineering and technical professionals, we cater to a wide range of industries, from bicycles to automotive and electronic components, ensuring tailored solutions. Additionally, we offer optimized production strategies aimed at cost reduction, shortened production times, and precise part manufacturing. At MFG SOLUTION, expect design optimization, cost efficiency, rapid delivery, top-notch quality parts, and 24/7 customer support.