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CNC Machining Services

Star Rapid’s CNC machining services offer you precision fabrication of plastic and metal parts in any volume. We specialize in multi-axis milling, turning, EDM, surface grinding, laser engraving and much more. In addition, you’re assured that all raw materials will meet your exact specifications because of our best-in-class testing and verification laboratory. That’s one of many reasons why we are a preferred supplier to world-class companies for their most demanding CNC machining projects.

CNC Machining – What Is It and Why Do You Need It?

CNC machining is a broad manufacturing category that includes many different computer-controlled processes where raw material is selectively removed in exact amounts to produce a near-final shape of parts. That’s why it’s considered subtractive, as opposed to additive manufacturing or 3D printing. Standard CNC machining processes include milling, turning, surface grinding and electrical discharge machining (EDM) although there are other specialized applications. Whenever a machine is digitally controlled there must always be a 3D CAD file of the part design which is used to program the machine’s movements.

CNC machining is used on many common metals such as aluminum, brass, mild and stainless steels, magnesium and titanium. It can also be used on rigid or engineering-grade plastic resins. We employ it every day to make not only finished parts but also tools and dies that are used for plastic injection molding and pressure die casting.

Because of the reliability and precision afforded by modern tools controlled with sophisticated software, CNC machining is an ideal rapid prototyping and production volume solution for making complex end-use parts with very tight tolerances.

One of the great advantages to CNC machining is its versatility. It is highly flexible and adaptable to many shapes and sizes of parts, and because there is no need for fixed tooling one part can be made just as easily as one thousand. CNC machined components are full strength and they have excellent surface finishes. You can choose to put them into service immediately or they can be further processed with additional treatments such as plating, polishing, anodizing, painting and more.

Curious as to how a CNC machine works? Interact with our diagram below to learn more about the main features of a CNC milling center.


Advantages Of CNC Machining Services For Product Developers

CNC machining services at Star Rapid have many advantages for product development that can make it the ideal solution not only for rapid prototyping but also for volume production. Here is what you should consider.

  • Quick removal of large amounts of metal as well as engineering-grade plastic resins
  • Highly accurate and repeatable
  • Excellent for making complex geometries
  • Versatile
  • Suitable for many different kinds of substrates
  • Scalable volumes from one to 100,000
  • Low investment in tooling and preparation cost
  • Fast turnaround
  • Parts are full-strength and can be put into service immediately
  • Excellent surface finishes
  • Easily customized

CNC Machining Raw Materials

We work with a wide range of plastic and metal alloy materials including magnesium, mild and stainless steel, aluminum, brass and titanium as well as rigid engineering grade plastic resins. These materials are part of our standard inventory and can be sourced for immediate availability from reliable vendors who have been thoroughly vetted and approved by us. In addition we can also provide specialty materials such as super hard alloys – just talk with our engineers to learn how we can meet your needs.

Most importantly, to ensure that your CNC machined parts meet all regulatory requirements we have an incoming materials inspection lab where we use sophisticated analytic testing instruments using Raman spectroscopy to confirm the exact chemical and physical properties of all raw materials. We leave nothing to chance for your peace of mind.


CNC Machining Video | Star Rapid

CNC Turning Services


Star Rapid’s CNC turning services employ imported, high-speed turning centers with live tooling and automatic bar feeders. Live tooling using imported Gühring cutters lets us perform some milling and cross drilling functions without needing multiple machine set-ups, saving time and money. We routinely turn brass, aluminum, mild and stainless steels as well as rigid plastic. Our CNC turning services create complex external geometries and internal bores with very tight tolerances and excellent surface finishes. CNC turning is suitable for rapid prototypes, new product introduction and low-volume production.

CNC machined turned parts image at Star Rapid

CNC Milling Services


CNC milling services at Star Rapid use imported, multi-axis machine tools controlled with advanced PowerMILL and Vericut software. High-speed milling is ideal for creating prismatic shapes and complex geometries in a variety of brasses, mild and stainless steels, aluminum, titanium and rigid plastic. Advanced Gühring endmills and cutters, as well as European management expertise, provides you assurance that your parts will have tight tolerances with excellent surface finishes. And of course we have a complete range of in-house finishing services for even more product development solutions.

CNC machined rotor at Star Rapid

EDM / Wire EDM And Surface Grinding

Electrical discharge machining (EDM) is an essential manufacturing process used primarily on tool steels for plastic injection molding or pressure die casting. EDM uses a conductive graphite or copper electrode submerged in a dielectric bath of water or oil. When a high voltage current is applied to the electrode it sparks against the tool wall, etching away at the surface to produce deep holes, ribs, undercuts and surface textures that are difficult to machine conventionally. When done properly, EDM can produce excellent surface finishes with tight tolerances, virtually eliminating the need for secondary polishing. 

Surface grinding is an automated machining process used to make extremely flat and smooth surfaces. In this method, the workpiece is held in a fixture and then reciprocated across the face of a precision grinding wheel. 

CNC Machining Tolerances

Our general tolerances for CNC machining of metals is DIN-2768-1-fine and for plastics, DIN-2768-1-medium. Since tolerances and dimensions can be greatly affected by part geometry and type of material, we highly recommend consulting with our engineers before starting any project. We work with you every step of the way to ensure that your parts meet and exceed your expectations. 

Rapid Tooling Service

Star Rapid is more than just a rapid prototyping service provider. We also make rapid hardened and semi-hardened tools and dies to support full production volumes for plastic injection molding and pressure die casting. Using P20, Nak80, S136 and H13 steels, we can offer you superior quality, excellent surface finishes and unmatched quality control measures to suit the most demanding projects. 

Why Choose Star Rapid for CNC Machining Services?

Star Rapid’s CNC machining services are second to none. Here are some of the advantages we offer to every client on every project, regardless of size.

✓ Industry-Leading CNC Manufacturing Equipment and Materials

Our imported 5-axis CNC machining centers make turned and milled parts from a wide range of plastic, and metal alloy materials – such as aluminum, brass, nickel, and steel, both mild and stainless steel. We use industry-leading software like Autodesk PowerMill and CGTech Vericut, and we have over 14,000 genuine Gühring cutters in stock.

✓ A Proven Track Record

We can easily talk about our team’s experience and performance, but one of the best ways to show the superiority of our CNC machining services is to let our work speak for itself. Scroll down to our “See Our Past Projects” section to learn more about some of our thousands of success stories we’ve had with partners. We offer our services for the whole process – from the initial stages of product design, helping with material selection, to the point of manufacturing the first prototypes, to the final production run.

✓ Comprehensive Raw Material Testing and Verification

Our uncompromising material testing processes are a big reason why our CNC machining services are a cut above. All incoming raw materials are subject to chemical and physical analysis using advanced scientific equipment. No one else offers this level of material quality control, providing you with peace of mind along with Certificates of Compliance upon request. And of course in-process inspection ensures that each part is produced exactly to your design specifications.

✓ A Full Suite of Finishing Services

Many CNC machined parts require some form of post-finishing before they are ready to be put to use. From bead blasting to polishing, anodizing to plating, laser etching to painting, we offer every surface finish you need to make a great finished part.

✓ Intelligent Pricing for Every CNC Machining Project

Your time and budget matter to us. We never require a minimum order volume or minimum dollar value so you have complete flexibility to suit your schedule. And we’ve developed a proprietary AI quotation algorithm that harnesses deep learning to provide fast, accurate quotations without guesswork.

CNC Machining Quickfacts

Why choose CNC machining?
CNC machining is a fast, accurate and versatile solution for manufacturing production-quality parts in any quantity, without the need for investing in hard tooling or expensive set-ups.​

What raw materials can I use with CNC machining?
Finished CNC machined parts can be made from many types of easily available stock metals including mild and stainless steel, aluminum, brass, copper, magnesium and titanium. We can also machine rigid plastics. Check out our list of frequently used materials

What tolerances can I achieve with CNC machining?
We routinely produce parts to .05 microns, which is suitable for the majority of commercial and industrial applications. Closer tolerances are only advised for critical applications – they will require a longer lead time, and will increase processing costs.

CNC Machining: Further Reading

In our wholly-owned manufacturing facility located in China, Star Rapid is committed to offering world-class levels of quality and reliability with our CNC machining services. We set ourselves apart with foreign-trained machinists under European management, advanced equipment and sophisticated Gühring cutting tools. We make rapid prototypes, rapid tooling and low-volume production parts in a variety of metals and plastics. Get an introduction to our CNC milling services in China in this short guide. Read more…

CNC machining is highly versatile and can be used to make complex parts in a wide variety of solid materials – both metal alloys and high quality hard plastics. Determining which of our material options is best for you involves considering several related factors, including the materials cost, workability, corrosion resistance, strength, weight and appearance. Our CNC machining services team has put together this guide on the advantages and applications for the most common types of metals we use every day to make rapid prototypes and low volume production parts. Read more…

Star Rapid’s pursuit of better CNC machining services never stops. Committed to the highest standards of quality and driven to innovate within our industry, we’ve developed a number of patented solutions for different parts of the CNC machining process. With 21 registered patents and eight more in the works, we are a registered high-tech enterprise and an excellent choice for your CNC machining needs. In this post, learn more about some of our most important innovations — including our pneumatic holding fixture, automatic indexing fixture, a fixture for spherical parts and more — to discover how they benefit our CNC machining services. Read more…

Star Rapid has partnered with German toolmaker Gühring to be our exclusive supplier of CNC cutting tools and end mills. An industry leader, Gühring applies proprietary, vacuum-deposited thin film coatings to their tools. These coatings have been proven through extensive testing to offer a number of benefits. These include increased tear resistance, heat resistance, improved lubrication and hardness, all of which improve the durability of these tools and the quality of the parts they make. Read this post to learn more about this technology and why we use Gühring tools for our CNC machining services. Read more…

See Our Past CNC Machining Projects

Drones have quickly become one of the most versatile tech solutions for businesses across a handful of industries. One of those industries is agriculture, where drones can be used to collect data and even aid in planting new crops. We worked with MicaSense, an agricultural tech company, to build an enclosure for Altum, the company’s new agricultural drone sensor. To ensure maximum durability in any outdoor environment, our CNC machine division created a three-part design and milled the enclosure from aluminum 6061 with a T6 temper. To protect against corrosion and maximize aesthetic appeal, we added a clear alodine coating to some parts and color-anodized others. Learn more about our production process for Altum in this case study.

Who says you can’t drink wine in the wild? Glass on the Grass is an innovative coaster designed to slip over the base of a wine glass and provide stable support on flat, uneven surfaces. Working with designers at Breathe Create, our team created a set of prototypes using multi-axis CNC machine centers and high-quality, clear acrylic plastic. We then worked closely with Threedom, a well-known design firm, to fine-tune our injection mold tools for manufacturing. After intensive tool preparation and testing phases, we created a set of production-ready plastic injection mold tools for export. Read this case study for a step-by-step guide on how we used CNC machining services to create Glass on the Grass.

Getting the perfect putting stroke is just about practice. It’s also about finding the right product. After all, every stroke is slightly unique—shouldn’t every putter be the same way? That’s the central idea behind the Custom Putter by CMBD, an industry-leading product development company. Each Custom Putter is designed to fit a specific player’s dimensions and stroke style. As such, the Custom Putter has a number of interchangeable parts that are combined to create a custom fit. When CMBD approached our team to CNC machine the club’s parts, we used a precision multi-axis process to fabricate each part from high-quality Japanese D2 tool steel. Read up on our process and see the results in this case study.

Robotic exoskeletons are showing tremendous promise as assistive devices in healthcare, security, and manufacturing fields. The Institute for Human and Machine Cognition (IHMC), a not-for-profit research institute, is currently developing several robotic exoskeleton solutions as part of its Exoskeleton Project. Our team worked with IHMC to develop parts for the Mina v2, a powered robotic exoskeleton designed to provide assisted mobility to people with a physical disability. Our CNC machining services division handled the project, creating the most complex parts on our 5-axis CNC mill. After the primary CNC machine work, we bead-blasted, cleaned, and anodized all aluminum parts for extra corrosion- and scratch-resistance. Learn more about our process and check out the finished Mina v2 when you read this case study.

Get Your CNC Machining Project Started Today

With a range of options for CNC finishing services to choose from and guaranteed quality thanks to our inspection services you can trust you will receive great parts every time. Once you send us your 3D CAD file, one of our customer service engineers will check your design for manufacturability to ensure that the part can be made to your expectations and budget requirements. Contact us today for a free quote!

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Star Rapid engineer

Star Rapid CNC Machining Service FAQ

What makes Star Rapid’s CNC machining service the best in the industry?

To deliver the industry’s finest CNC machining services, our team combines decades of expertise with the world’s most advanced equipment. We use imported 3, 4 and 5-axis CNC machining centers to make turned and milled parts from an extensive selection of plastic and metal materials. We also offer a wide range of CNC machining services, including milling and turning, EDM and wire EDM, surface grinding and more. Our material verification standards are superior to many of our Asia-based competitors, and we proudly offer fast and smooth correspondence, manufacturing, and delivery.

Is Star Rapid’s CNC machining service in-house?

Yes — our team completes all CNC machining at our facilities. This gives us a much higher level of production control in comparison to companies that outsource machining.

What are Star Rapid’s quality standards for the CNC machining service?

Our in-depth CNC machining quality-control process is just one of the many reasons why thousands of businesses worldwide choose us for their production needs. This process starts with incoming materials, on which our staff performs a comprehensive inspection to verify integrity and performance. During production, we also perform in-process inspection and testing to make sure each part is produced exactly to your specifications.

How does CNC machining work with plastic injection molding and pressure die casting?

CNC machining is used to make tools for plastic injection molding and dies for pressure die casting. CNC machining is also used for post-processing steps, including drilling holes, tapping threads and more.

Request Your Free CNC Machining Quote Today

Our improved algorithm decreases CNC machining quotation times by up to 90%. Most quotes are delivered within 24 hrs. and usually in much less time, depending on project details.

Your customer support partner will contact you directly about your CNC machining quote to ensure you’ve received and understand all aspects of your quotation and to answer any questions you may have about your options.

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