Plastic CNC Machining

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A wide range of plastics for CNC machining, with applications in multiple industries. Ideal for both one-off prototypes and end-use custom parts.

Plastic Machining Materials

GY’s plastic machining process is suitable for many plastics, including all thermoplastics and some thermosetting plastics and resins. Learn all about plastic materials, and compare properties, brands, and typical plastic material applications.

ABS

ABS has good dimensional stability and excellent impact strength and is easily machined. This makes CNC machined ABS ideal for applications that require low-cost and hard-wearing parts such as tool enclosures and casings. CNC machined ABS exhibits remarkable toughness, rigidity, and shock absorbance characteristics, especially for such an inexpensive material.

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POM gear

Acetal / POM

Acetal plastic, also called polyacetal and polyoxymethylene (POM), is a general purpose, semi-crystalline, engineered thermoplastic. Acetal is commonly used for parts that need to be very stiff, have low surface friction and good dimensional stability. Dimensional stability is the ability of a plastic part to maintain its original dimensions when it is exposed to changes in temperature and humidity.

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CPVC / PVC

Polyvinyl chloride (PVC, or vinyl) is a high strength thermoplastic material, most used in the building and construction, health care, electronics, automobile and other sectors. The main difference between CPVC and PVC is the range of temperatures each is capable of withstanding. CPVC can handle temperatures up to 200° Fahrenheit, while PVC peaks at 140° Fahrenheit. Above those temperatures, both CPVC and PVC will begin to soften, increasing the risk of joints and pipes failing, and therefore, failing of the plumbing system.

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POM Delrin-cnc machining round parts

Delrin

Delrin® is the brand name for polyoxymethylene (POM), also commonly referred to as acetal. It’s a semi-crystalline engineering-grade thermoplastic that offers superior dimensional stability, high strength, wide operating temperature range, and low friction. It has an excellent physical and mechanical properties, commonly known as “metal plastic“. Easily machinable POM is a popular choice for CNC operations.

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HDPE

High Density Polyethylene (HDPE) is a thermoplastic polymer made from petroleum. It has impact resistance, high tensile strength, low moisture absorption and chemical and corrosion resistance properties are required. HDPE is not an easy-to-machine material, the CNC milling process is recommended and high milling speeds are required. 

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Nylon (PA66)

Nylon is a strong, stiff engineering plastic with outstanding bearing and wears properties. The PA66 nylon material, especially when reinforced, is electrically conductive and shielding, making it useful for electrical and automotive. Nylon offers ease of machining and tight tolerances due to its inherent strength, toughness, and dimensional stability. 

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LDPE

LDPE (low density polyethylene) is a soft, flexible, lightweight plastic material. LDPE is noted for its low-temperature flexibility, toughness, and corrosion resistance. It’s not as hard than HDPE (high-density polyethylene), nonetheless exhibits good machining properties. It is often used for orthotics and prosthetics. LDPE has good chemical and impact resistance and is easy to fabricate and form. 

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Polyamide-imide (PAI)

PAI (polyamide-imide) is an extremely strong and stiff plastic material. It is often used in elevated temperature environments where other thermoplastics would lose their mechanical properties. PAI is a very dimensionally stable material with an extremely low coefficient of thermal expansion (CTE) making it an excellent choice for applications that require machining to tight tolerances. It is available in a variety of formulations.

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PBI electronic plastic parts

Polybenzimidazole (PBI)

Polybenzimidazole (PBI), also called is a synthetic fiber characterized by exceptional thermal and chemical stability. PBI is commonly used in electrical insulators and high strength situations, where it shines due to its compressive strength and insulation properties. 

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Polycarbonate (PC)

Polycarbonates, more commonly known as PC, is a naturally transparent thermoplastic. The raw material allows for the internal transmission of light with nearly the same capacity as glass but with a lighter weight, especially useful when the product requires outstanding resistance to impact and / or good transparency.

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PEEK-gear-cnc-machining

PEEK

PEEK material (chemically known as polyetheretherketone) is manufactured by Ensinger in standard stock shapes for machining.FDA food contact compliant, color natural/beige. PEEK plastic is often used in hot water or steam environments because it maintains a high level of physical properties such as flexural and tensile strength despite the severe environment. 

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Polyimides (PI)

PI plastic is a non-melting high temperature polymer. It can be thermosetting as well as thermoplastic. It replaces materials like glass, metals and even steel in some applications. Strength, dimensional stability, and creep resistance remain high even at temperatures above 260°C.

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Polyethylene Terephthalate (PET)

PET (polyethylene terephthalate, semicrystalline) is a strong, stiff engineering plastic that is often used for food processing machinery applications where low moisture absorption, low thermal expansion, resistance to staining, or resistance to cleaning chemicals is required.

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PMMA (Acrylic)

PMMA, also named Acrylic. Comes from clear, colorless pellets, granules, and sheets. It is a colorless and clear polymer that can come in different forms. For example, it comes as small granules, pellets, or sheets. Where transparency, UV stability, colorability, and surface hardness are concerned, PMMA is a safe, cost-efficient option. 

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Polyphenyleensulfid (PPS)

Polyphenylene sulfide (PPS) is a semi-crystalline, high-temperature engineering thermoplastic. It is a rigid and opaque polymer with a high melting point (280°C). It consists of para-phenylene units alternating with sulfide linkages. And it can be easily processed, and its toughness increases at high temperatures.

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Polypropylene (PP)

Polypropylene (PP) is a commercially important polymer used in a variety of applications owing to its low cost. It is a commodity plastic with low density and high heat resistance. Suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. CNC machining in polypropylene may be more challenging than with other common plastics due to its tendency to gall and melt.

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PPSU

PPSU (polyphenylsulfone) is an amorphous high-performance thermoplastic made from RADEL R Resin. PPSU has a high glass transition temperature and low moisture absorption. The impact resistance, coupled with a heat deflection temperature of 405°F (207°C) and virtually unlimited steam autoclave resistance, make RADEL R PPSU the material of choice for many reusable medical components.

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PSU

Polyarylsulfones (PSU) belong to the group of polysulfones and are thermoplastic, transparent plastics. Due to their amorphous molecular structure, polysulfones are translucent and have a light brown tint. Polysulfone (PSU) is a high temperature plastic with high mechanical strength and rigidity.

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PTFE

PTFE (polytetrefluoroethylene) is a soft, low friction fluoropolymer with outstanding chemical resistance and weathering resistance. Being hydrophobic, non-wetting, high density and resistant to high temperatures, PTFE is an incredibly versatile material with a wide variety of applications, though it’s perhaps best-known for its non-stick properties.

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Ultem

ULTEM 1000 is a translucent amber colored plastic with excellent durability, strength, stiffness and heat resistance. ULTEM 1000 may be selected over Nylon or Delrin because it has the highest dielectric properties. Common applications include industrial equipment, medical devices and electronics.

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Plastic Machining Capabilities

GY offers cutting-edge plastic CNC machining services, delivering unmatched quality and rapid turnaround times. Our state-of-the-art 3, 4, and 5-axis CNC machines produce high-quality plastic parts boasting complex geometries. With over 35 milling and turning machines in our arsenal, we consistently maintain ample capacity and competitive pricing. Our capabilities cater to orders ranging from small-volume, simple parts to intricate, high-complexity plastic CNC machining projects.

Our team of skilled CNC machinists utilizes the latest software technology to program our machines, meticulously translating your designs into reality. This enables us to manufacture plastic parts that:

  • Parts with very small or large dimensions
  • Complex designs
  • Parts that require strict measurements
  • Parts with a high-quality surface finish

Custom Machined Parts - Understanding Your Application

At GY Machining, we have the technical capabilities and industry knowledge necessary to produce high-quality and cost-effective parts and products from a wide range of plastics. Whether you’re seeking a one-off prototype or a high-volume production run, we’ll work with you to make your design a reality.

Our experts are here to assist you with all aspects of your Project. We would be delighted to visit you and examine in Detail your challenging task on site.

Whether you require a prototype or complicated plastic parts, no manufacturer is better than us.

What Makes Us Different?

At GY, we are ISO 9001: 2015 certified fabricators. By partnering with us for their plastic machining needs, our customers benefit from our:

  • Over 12 years of experience in plastic manufacturing
  • Knowledge of specialized fields, including the biomedical pharmaceutical, and semiconductor industries
  • 30,000-square-foot fabrication facility
  • OEM manufacturing capabilities
 

These characteristics allow us to meet some of the most difficult design challenges while forming lasting relationships with our industry clients.

Additional Processing Services

Our one-stop solution provides assembling, packaging, inspecting, and other services, to save your time and cost. You will get the finished products in one place. Cost? No extra service cost.

Assembly Line

Inspecting

Warehouse

Packing

Why Choose US?

Working with market leaders in the On-demand manufacturing industry, without the busyness and risk.

No MOQ

We respect your project, no matter how the scale of it, to help you achieve it to make it come true. We will supply different solutions to make you satisfied.

Low Cost

After 12 years of the plastic machining industry, GY has come up with high-quality products at cheap rates, no matter it is a big project or a small one. not just cheap, but worthable.

Fast delivery

We have 35 CNC milling and tuning machines, with a whole production process, including laser engraving, and two assembly lines, which takes your project from design to delivery faster than your competitors.

Experienced Engineers

Our engineers have rich experience in plastic part design and project solutions. What we do is give you high-quality products while saving costs.

High Precision

We support a high precision on special plastic parts as your requested, tolerance can be reached up to ±0.05mm, like wheels, medical devices, and robots.

Wide Range of Finishes

We can offer a wide range of coatings, engarving, and finishes for your parts depending on your project requirements.

Quality is Our Top Priority

At GY machining company, quality and customer satisfaction are our top priorities. We use cutting-edge technology and rigorous quality control processes to ensure every product we deliver is top-notch. But quality goes beyond just the machines we use – it’s a core value that every member of our team takes pride in.

We’re here to build strong, lasting relationships with our customers. That’s why we offer attentive, personalized service that goes the extra mile. We believe in creating win-win partnerships, and we’re confident we can help you achieve your goals.

Ready to experience the difference? Contact us today to discuss your needs and explore how we can work together to achieve mutual success.

Plastic Machining Service– The Ultimate FAQ Guide

Are you searching for customized plastic parts that is easy to machine and does not require much effort and time? 

CNC Plastic Machining can be the best solution for these concerns. Plastic machined parts are a great alternative to metal parts as they are lightweight, easier to machine and often less expensive. 

In our guide below, we have put together the most useful knowledge, with the help of our experts.

So, let’s get started!

Get A Quick Quote

We always insist on high quality and cost-effective products, contact us today to get an accurate quotation.

Table of Contents

Applications of Plastic Machining

Plastic machined parts are a great alternative to metal parts as they are lightweight, easier to machine, and often less expensive. While many different manufacturing processes can be classified as plastic machining, turning, milling and drilling are the three most common techniques.  

Turning Material holds bars in a chuck and rotates them while feeding a tool to the piece to remove material until the desired shape is achieved. Lathes almost always carry out these processes.

Drilling Material is fixed to a table while a drill tool is rotated into the workpiece to create bores in part. Since drilling is a straightforward process, it can be done on both lathes and mills.

Milling Material is fixed to a sliding table while a spindle is equipped with cutting tools and lowered to machine complex forms. The milling is carried out using milling machines or machining centers.

Applications

Plastic machining creates a large variety of products, including

  • Automotive components
  • Electronics components
  • Medical device components
  • Housewares Toys
  • Industrial components
  • Sporting goods Aircraft components
  • Electrical connectors

What Plastic is Best For Machining?

When it comes to CNC machining, different plastics have different strengths. We want to help you pick the best one for your project!

Easy to Work With, Great Results: ABS is a favorite for CNC machining because it’s easy to cut and stays the same size and shape. This makes it a versatile choice for many projects.

Need it Slick and Strong? If you need a part that’s smooth and doesn’t bend easily, Polyoxymethylene (POM) is a great option. It cuts cleanly and is super stiff.

Looking for Something Special? There are many other plastics out there, each with its own special features. Maybe you need something super strong, a certain color, or something else entirely. We can help you find the perfect plastic to fit your exact needs.

Advantages of Machining Plastics

    • Reduced upfront costs

    • Rapid turnaround

    • Economical for small batches

    • Prototype before production

    • Accommodates thicker sections

    • Large parts, no problem

    • Low machining force

    • Dry machining option

Disadvantages of Machining Plastics

  • Material: Not all plastics work well. Rigid ones are preferred.
  • Cost: Solid plastic blocks can be expensive.
  • Scrap: More leftover plastic compared to some methods.
  • Swarf: Removing plastic shavings (swarf) can be challenging.
  • High volume: Less cost-effective than injection molding for mass production.
  • Jigs/Fixtures: Large-scale jobs might need special tools to hold plastic.
  • Heat: Plastics trap heat, requiring careful machining.
  • Dust: Dusty composite plastics need good dust collection.

An Overview of Plastic Machining Services

Plastic machining, like other machining processes, works by removing material layer by layer to create the desired final shape. Here’s a breakdown of some common techniques used for plastic:

  • Cutting: This seems simple, but heat is a concern. To avoid warping the plastic, careful cutting with saws is ideal for getting plastic sheets to the right size.

  • Turning: Imagine a spinning pottery wheel. Plastic turning works similarly, with the plastic rotating on a lathe while a stationary tool cuts away excess material to match the design.

  • Milling: Unlike turning where the plastic spins, milling keeps the plastic stationary. Here, the cutting tool rotates, removing small chips of plastic to achieve the desired shape. There are different milling techniques, and some (like down-milling) work better for plastics than others.

  • Drilling: Drilling holes in plastic can be tricky. The wrong drill can overheat or damage the plastic. However, a skilled technician with the right tools can create various sized holes without harming the structure.

  • Grinding: Similar to milling, grinding removes plastic chips to alter the shape. The key difference? Milling uses short, repeated cuts, while grinding continuously removes material to create a smoother surface finish.

A Brief Introduction of Placing an Order

It’s easy to work with us!

1. Submit 2D/3D drawings to us or an image with dimensions.

2. Make a quote for you.

3. We proceed to make samples.

3. You confirm the order after confirming the samples.

4. Start production

5. Arrange the shipment after packing well.

6. You receive the goods and give us feedback.

Contact us or request a quote today to learn more about our plastic machining capabilities.