Plastic machining stands as a cornerstone in the manufacturing world. It involves shaping plastic materials into various parts and components. This process caters to a wide range of industries. From aerospace to medical, plastic machining offers precision and versatility.

At RALLY, we harness state-of-the-art techniques to carve, mill, and turn plastics. Our approach ensures high precision and quality. Moreover, we select materials that best suit your project's needs. Whether you require durability, chemical resistance, or thermal stability, we have you covered. Our expertise allows us to work with an array of plastics. These include Acetal, Nylon, Polycarbonate, and more.

In essence, RALLY's plastic machining services promise to bring your ideas to life. We do so with unmatched precision and reliability. Let us be your partner in navigating the complexities of plastic machining. Together, we'll achieve outstanding results for your projects.

Plastic CNC Machining Materials

Part 1: Understanding Plastic Machining

Plastic machining shapes plastic materials into desired forms through processes such as milling, turning, and drilling. Unlike metal machining, this method offers unique advantages and serves various applications.

The Plastic Machining Process

The process begins with selecting the right plastic material based on the project's requirements. Using CNC machines, skilled machinists program precise movements to cut the plastic into specific shapes and sizes. Throughout, they closely monitor the process to ensure high accuracy and quality.

Advantages Over Metal Machining

Plastic machining outshines metal machining in several ways. Firstly, plastics are generally lighter, reducing the weight of the final product. They also offer excellent corrosion resistance, crucial for many applications. Additionally, machining plastics often requires less energy, making the process more cost-effective and environmentally friendly.

Common Applications

Machined plastics play a pivotal role across industries. In the medical field, they're used for surgical instruments and prosthetics due to their biocompatibility. Aerospace applications include lightweight components for aircraft. In electronics, machined plastics provide insulation for components. The automotive industry uses them for parts that reduce vehicle weight without sacrificing strength.

Plastic Machining Materials

Part 2: Types of Plastic Machining Materials

Most Commonly Machined Plastics

Acetal (Delrin)
Acetal, often known by its brand name Delrin, stands out for its strength, stiffness, and ease of machining. It excels in low friction and high wear resistance, making it ideal for gears and bearings.

Polycarbonate (Lexan)
Polycarbonate, or Lexan, is renowned for its extraordinary impact resistance and clarity. It withstands extreme temperatures and is perfect for protective gear and transparent applications.

Polyethylene (PE)
Polyethylene boasts remarkable chemical resistance and flexibility. Its variants, from high-density (HDPE) to ultra-high molecular weight (UHMW), cater to a wide spectrum of applications, including containers and marine uses.

Polypropylene (PP)
Polypropylene is lightweight, resistant to chemicals, and possesses excellent electrical properties. Its versatility makes it a top choice for automotive parts, packaging, and textiles.

PTFE (Teflon)
PTFE, widely recognized as Teflon, is unmatched in its resistance to heat and chemicals. With its non-stick surface, it's a go-to for seals and gaskets in harsh environments.

PVC is not only cost-effective but also offers superb electrical insulation properties. It's durable, resistant to chemicals and weather, making it suitable for piping and outdoor fixtures.

Nylon is prized for its toughness, wear resistance, and ability to absorb impact. It's a preferred material for mechanical parts like gears and fasteners due to its durability.

Acrylic (PMMA)
Acrylic, or PMMA, dazzles with its glass-like clarity and excellent weatherability. Its aesthetic appeal and resistance to UV light make it perfect for display cases and signage.

Each of these materials brings unique properties to the table. At RALLY, we guide you in choosing the right plastic. We ensure your project benefits from the specific strengths, durability, and resistance qualities needed. Together, we'll select the best fit for your application, promising results that exceed expectations.

Plastic Machining Materials

Part 3: Choosing the Right Plastic Material

Selecting the Ideal Plastic Material

Choosing the right plastic material is crucial for the success of your project. Let's dive into key factors and application-specific recommendations.

Key Factors in Material Selection

Mechanical and Thermal Properties
Consider strength, flexibility, and heat tolerance. These properties determine how well the material withstands physical stress and temperature variations.

Chemical Resistance
Evaluate the material's ability to resist corrosive substances. This is vital for components exposed to harsh chemicals.

Balance quality with budget. Some high-performance materials may be more expensive but offer longer life spans and reduced maintenance.

Environmental Impact
Consider recyclability and the material's carbon footprint. Eco-friendly choices reflect well on your brand and comply with regulations.

Application-Specific Recommendations

For High-Stress Applications
Choose materials like Nylon or Acetal. They offer superior strength and wear resistance, perfect for gears or moving parts.

For High-Temperature Environments
PTFE (Teflon) is your go-to. Its exceptional heat resistance ensures performance in demanding conditions.

For Outdoor Use
Look for UV-resistant plastics like Acrylic or Polyethylene. They withstand sunlight exposure and weathering, maintaining their integrity over time.

For Electrical Insulation
PVC and Polypropylene are excellent insulators. They protect against electrical hazards in wiring and electronic components.

At RALLY, we understand the intricacies of material selection. We guide you through these considerations, ensuring your project benefits from the optimal plastic material. Our expertise ensures durability, functionality, and cost-efficiency, tailored to your specific application needs. Let's make informed decisions together, leading to successful and sustainable outcomes.

Plastic Machining Parts

Part 4: Tips for Machining Plastics

Machining plastics requires precision and understanding of each material's characteristics. Here are essential tips to ensure success in your plastic machining projects.

Choose the Right Tools
Select tools specifically designed for plastics. Sharp, high-speed steel or carbide tools prevent melting and ensure clean cuts.

Control the Heat
Plastics are sensitive to heat. Use coolants or air blasts to keep the temperature down. This prevents warping and maintains accuracy.

Ensure Proper Fixturing
Secure the plastic firmly but without excessive pressure. This avoids deformation and ensures precise machining.

Adjust Feed Rates and Speeds
Opt for higher feed rates and lower speeds. This strategy reduces heat generation and chip welding, leading to smoother finishes.

Minimize Manual Finishing
Aim for precision in the machining process to reduce the need for extensive manual finishing. This saves time and maintains material integrity.

At RALLY, we emphasize these practices to deliver parts that meet exact specifications. Our expertise in machining plastics ensures that your components are not only precise but also of the highest quality. Trust us to navigate the complexities of plastic machining, ensuring your projects are successful from start to finish.

precision machining manufacturer RALLY

Part 5: Innovations in Plastic Machining

Innovations in plastic machining are transforming the industry. At RALLY, we stay ahead by adopting these cutting-edge techniques. Digital modeling now allows for precise simulations before actual machining, minimizing errors and material waste.

Additionally, advancements in CNC technology enable more complex geometries with tighter tolerances than ever before. Laser machining has also emerged as a powerful tool, offering unmatched precision in cutting and engraving plastics. Furthermore, eco-friendly machining practices are gaining traction. These involve using sustainable materials and recycling chips and cut-offs.

As a result, we not only enhance our machining capabilities but also contribute to environmental sustainability. These innovations ensure that RALLY delivers superior quality parts, faster turnaround times, and more cost-effective solutions for our clients. Embracing change, we continue to refine our processes and exceed customer expectations.

HDPE Plastic CNC Part
POM CNC Plastic Parts
Acetal CNC Plastic machining part

Part 6: Case Studies

Revolutionizing Medical Devices
RALLY partnered with a leading medical company to create innovative surgical tools. Using high-precision CNC machining, we worked with PEEK plastic for its biocompatibility and strength. The result? Durable, precise tools that surgeons trust.

Elevating Aerospace Components
In aerospace, every gram counts. We machined lightweight, high-strength Polyetherimide (PEI) components for an aerospace client. These parts reduced weight without compromising on durability, enhancing overall aircraft performance.

Advancing Automotive Innovation
For an automotive project, RALLY machined complex Nylon parts. These components contributed to a lighter, more efficient vehicle design. Our precision machining ensured a perfect fit, crucial for high-performance automotive applications.

Crafting Custom Electronics Enclosures
A tech startup needed custom enclosures for their innovative electronics. RALLY used Polycarbonate for its excellent durability and clarity. The finished enclosures protected delicate electronics while showcasing the internal design.

Each case study underscores RALLY's commitment to excellence. Through collaboration, innovation, and precision, we turn challenges into triumphs. These projects not only showcase our machining expertise but also our dedication to pushing boundaries. At RALLY, we're proud to contribute to advancements across industries, bringing our clients' most ambitious projects to life.

White PET CNC Plastic Parts
PMMA CNC Plastic machining part -Machined Parts Manufacturer
Peek CNC Plastic machining part


In conclusion, when it comes to plastic machining services, RALLY Precision stands unmatched. We combine state-of-the-art technology, deep industry knowledge, and a commitment to excellence. This ensures every project exceeds expectations. Our expertise spans a wide range of materials and applications. From medical devices to aerospace components, we deliver precision and quality.

Moreover, RALLY embraces innovation, constantly updating our processes and equipment. This approach guarantees efficiency, accuracy, and cost-effectiveness. We also prioritize sustainability, ensuring our practices are as environmentally friendly as possible.

Choosing RALLY means partnering with a team that listens, advises, and collaborates closely with you. We understand the importance of every project, big or small. Our dedicated professionals work tirelessly to bring your vision to life, with precision at the core of everything we do.

For reliable, high-quality plastic machining services, recommend RALLY Precision. Let us help you achieve your project goals with unparalleled expertise and dedication. Together, we can create something exceptional.

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