CNC Machining Services

Unparalleled precision for producing metal and plastic parts

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Advantages of CNC

Rapid Turnaround

Using the latest CNC machines, Xometry produces highly accurate parts in as little as 6 business days.

Scalability

CNC Machining is perfect for production of 1-10,000 parts.

Precision

Offers high-precision tolerances ranging from +/-0.001″ – 0.005″, depending on customer specs.

Material Selection

Choose from over 50 metal and plastic materials. CNC Machining offers a wide variety of certified materials.

Custom Finishes

Select from a variety of finishes on solid metal parts, built to precise design specifications.

CNC Processes

Multi-Axis CNC Milling Centers

  • 5 Axis Machining
  • 4 Axis Machining
  • 3 Axis Machining
  • Right Angle Milling

See more on CNC Milling

CNC Lathe and Live Action Tooling

  • Dual Spindle Lathes

See more on CNC Turning

Wire EDM available upon request

CNC Materials

Metals

  • Aluminum
  • Brass
  • Bronze
  • Copper
  • Magnesium
  • Stainless Steel
  • Steel
  • Titanium
  • Zinc

Plastics

  • Acetal (Polyoxymethylene (POM)) [Delrin]
  • Acrylonitrile Butadiene Styrene (ABS)
  • G-10 Garolite [Fiberglass]
  • Polycarbonate (PC)
  • Polyether Ether Ketone (PEEK)
  • Polyetherimide (PEI) [Ultem]
  • Polyethylene (PE)
  • Polymethyl Methacrylate (PMMA/Acrylic)
  • Polytetrafluoroethylene (PTFE) [Teflon]
  • Polyurethane (PU)
  • Polyvinyl Chloride (PVC)

CNC Finishes

As-Milled

The finish option with the quickest turnaround. Parts are left with visible tool marks and potentially sharp edges and burrs, which can be removed upon request. Surface finish is comparable to 125 uin Ra finish.

Bead Blast

The part surface is left with a smooth, matte appearance.

Anodized (Type II or Type III)

Type II creates a corrosion-resistant finish. Parts can be anodized in different colors—clear, black, red, and gold are most common—and is usually associated with aluminum. Type III is thicker and creates a wear-resistant layer in addition to the corrosion resistance seen with Type II.

Powder Coat

This is a process where powdered paint is sprayed onto a part which is then baked in an oven. This creates a strong, wear- and corrosion-resistant layer that is more durable than standard painting methods. A wide variety of colors are available to create the desired aesthetic.

Custom

Don’t see the finish you need? Submit an RFQ and we’ll look into a finishing process for you.

Applications for CNC

Rapid Tooling

Because CNC machining services can be applied to virtually any material, it is perfect for rapid tooling, i.e., creating fixtures or molds.

Rapid Prototyping

The range of materials available, low cost per unit, and speed of production makes CNC a great option for prototyping.

End-Use Production

High-quality finish, vast material options and precise tolerances have made CNC machining a favorable technology for end-use parts.

Overview: What is CNC?

The Basics of CNC Machining

CNC (Computer Numerical Controlled) machining is a means to remove material with high precision machines, using a wide variety of cutting tools to create the final design. Common CNC machines include vertical milling machines, horizontal milling machines, lathes, and routers.

How CNC Machining Works

To successfully make a part on a CNC machine, skilled machinists create programmed instructions using CAM (Computer Aided Manufacturing) software in conjunction with the CAD (Computer Aided Design) model provided by the customer. The CAD model is loaded into the CAM software and tool paths are created based on the required geometry of the manufactured part. Once the tool paths are determined, the CAM software creates G-Code (machine code) that tells the machine how fast to move, how fast to turn the stock and/or tool, and where to move the tool or workpiece in a 5-axis X, Y, Z, A, and B coordinate system.

Types of CNC Machining

There are several types of CNC machine — namely the CNC lathe, CNC mill, CNC router, and Wire EDM

With a CNC lathe, the part stock turns on the spindle and the fixed cutting tool is brought into contact with the workpiece. Lathes are perfect for cylindrical parts and are easily set up for repeatability. Conversely, on a CNC mill the rotating cutting tool moves around the workpiece, which remains fixed to a bed. Mills are all-purpose CNC machines that can handle most any machining process.

CNC machines can be simple 2-axis machines where only the tool head moves in the X and Z-axes or much more complex 5-axis CNC mills, where the workpiece can also move. This allows for more complex geometries without requiring extra operator work and expertise. This makes it easier to produce complex parts and reduces the chance of operator error.

Wire Electrical Discharge Machines (EDMs) take an entirely different approach to CNC machining in that they rely on conductive materials and electricity to erode the workpiece. This process can cut any conductive material, including all metals.

CNC routers, on the other hand, are ideal for cutting soft sheet materials such as wood and aluminum and are more cost-effective than using a CNC mill for a similar job. For harder sheet materials such as steel, a waterjet, laser, or plasma cutter is required.

Benefits of CNC Machining

The benefits of CNC machining are numerous. Once a tool path is created and a machine is programmed, it can run a part 1 time, or 100,000 times. CNC machines are built for precise manufacturing and repeatability which makes them cost-efficient and highly scalable. CNC machines can also work with a variety of materials from basic aluminum and plastics to more exotic materials like titanium — making them the ideal machine for almost any job.

Industries That Use CNC Machining

CNC machining is crucial in many industries, such as are aerospace & defense, automotive, energy, industrial machinery, medical, robotics, and R&D. These machines are also vital to other manufacturing processes. For example, the molds required for injection molding are CNC machined to ensure the precision of both the mold and the plastic part it makes.

The Benefits of Working With Xometry For CNC Machining

Xometry's massive partner network means that whatever your part, we have a shop and a machine that can make it. We integrate seamlessly with over 2,500 vetted manufacturing partners in the U.S. including ITAR qualified facilities. With such a high volume of qualified shops and certified materials available, using Xometry takes the guesswork out of part sourcing. Our partners support the latest in CNC machining and turning processes, can support a high level of part complexity and provide exceptional surface finishes. We can also machine and inspect to any 2D drawing, always ensuring you have the CNC machined parts you need, at-quality and on time.

Industries that use CNC

Featured CNC Resources

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Machine Hours
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Parts Quoted
500k+
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