Choose the Right Polymer for CNC Machining
When CNC machining with polymers, how can you select the most suitable material?
A wide array of polymers, from Acryl to PVC, present unique attributes such as strength, flexibility, heat, and chemical resistance. These properties make them perfect for specific applications, which is why we’ve prepared this guide.
You’ll find a comprehensive overview of the most frequently used polymer materials in CNC machining, including their composition, significant benefits, and typical uses.
Price Overview
The polymer you choose affects the price you’ll pay for your component. In addition to the raw material cost, some polymers may involve additional machining expenses. This table shows the differences.
Material Overview
ABS
Overview: ABS is a common thermoplastic polymer typically used for injection molding applications. It’s composed of Acrylonitrile, Butadiene, and Styrene.
Benefits:
• High impact resistance
• Good machinability
• Excellent dimensional stability
Key Applications: Commonly used in automotive components, consumer electronics, and protective equipment.
Acryl (PMMA)
Acryl, often known as PMMA or Acrylic, is a transparent thermoplastic with exceptional optical clarity. It’s primarily composed of polymethyl methacrylate.
Benefits:
• Excellent optical clarity
• Good weather resistance
• High light transmission
Key Applications: Used frequently in signage, lighting fixtures, and optical devices.
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HDPE
High-Density Polyethylene (HDPE) is a thermoplastic polymer made from petroleum. It is well known for its high strength-to-density ratio.
Benefits:
• High strength-to-density ratio
• Good impact resistance
• Excellent chemical resistance
Key Applications: Often used in producing corrosion-resistant piping, and plastic lumber.
Nylon 6
Nylon 6 or Polyamide 6 (PA6) is a semi-crystalline polyamide with excellent wear resistance.
Benefits:
• High mechanical strength
• Good fatigue resistance
• Excellent wear resistance
Key Applications: Frequently used in the automotive industry, gears, and sports equipment.
Nylon 6 30GF
Nylon 6 30GF is a 30% glass-fiber-reinforced nylon 6. It offers improved strength, stiffness, and temperature resistance.
Benefits:
• High strength and stiffness
• Good dimensional stability
• Excellent temperature resistance
Key Applications: Widely used in automotive under-hood applications, as well as electrical and electronic parts.
PC
Polycarbonate (PC) is a thermoplastic polymer known for its transparency and high-impact strength.
Benefits:
• High impact strength
• Good electrical insulation
• Excellent optical clarity
Key Applications: Commonly used for bulletproof glass, eyewear, and compact discs.
PEEK
Polyether Ether Ketone (PEEK) is a semi-crystalline thermoplastic with excellent mechanical and chemical resistance properties.
Benefits:
• High chemical resistance
• Good mechanical properties
• Excellent thermal stability
Key Applications: Often used in the aerospace, automotive, and medical industries.
POM
Polyoxymethylene (POM), also known as Acetal, is a semi-crystalline thermoplastic known for its high stiffness and excellent dimensional stability.
Benefits:
• High stiffness
• Good dimensional stability
• Excellent wear resistance
Key Applications: Frequently used for precision parts requiring high stiffness, low friction, and excellent dimensional stability.
PP
Polypropylene (PP) is a thermoplastic polymer used in various applications. It is known for its toughness and resistance to chemicals.
Benefits:
• High toughness
• Good chemical resistance
• Excellent electrical insulation
Key Applications: Commonly used in packaging, textiles, and automotive components.
PTFE
Polytetrafluoroethylene (PTFE) is a high-performance fluoropolymer known for its non-reactivity, high-temperature resistance, and low friction.
Benefits:
• High-temperature resistance
• Low friction
• Excellent non-reactivity
Key Applications: Often used in non-stick cookware, electrical insulation, and seals.
PVC
Polyvinyl Chloride (PVC) is a widely used synthetic plastic polymer. It’s known for its durability and cost-effectiveness.
Benefits:
• High strength
• Good flame resistance
• Excellent chemical resistance
Key Applications: Frequently found in pipes, electrical cable insulation, and signs.
Choosing the Right Polymer
One of the key advantages of CNC machining is the extensive range of materials available. At MakerVerse], we can provide materials beyond our standard offerings. With our global supply chain, we’re ready to deliver your needed parts.
If you require further assistance in choosing the right polymer for your CNC machining project, we’re here to help. Upload your part and specify your request in the comments when requesting a quote. Our team of experts is eager to assist.
