Custom CNC Machining Services

CNC machining services for rapid prototypes and production parts. Get CNC quotes today, and order your custom metal and plastic parts.
  • CNC Quick Quote
  • 1 off CNC Prototype
  • Tolerances down to ±0.0004″ (0.01mm)
  • 100K+ Mass Production Machining

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Our CNC Machining Services

If you need custom machined parts with complex geometries, whether you need prototypes or production parts, our CNC machining services can help you realize your ideas.
We offer a variety of online CNC machining services, including milling, turning, EDM, wire EDM, and surface grinding. With precision 3-, 4- and 5-axis CNC machining centers, as well as 100+ different types of materials and surface treatment technologies, we can handle the fast turnaround and quality of CNC machining prototypes and production parts for metal and plastic materials.
Request your online quote now to complete and deliver your machined parts in as little as 5 days.

CNC Milling

CNC milling removes material from plastic and metal workpieces, using cutting tools or multi-point milling cutters to create custom-designed parts with different geometries.
With our 3- and 5-axis CNC milling services, you can get milled parts with tolerances up to 0.02 mm (± 0.0008 inch).
Explore our CNC milling capabilities

CNC Turning

CNC turning is an effective method for manufacturing round parts for plastic and metal bars or tubes such as shafts, worms. In combination with the active tool, multiple geometries can be milled at the same time.

Explore our CNC turning capabilities

From CNC Prototyping to Production

CNC machining is a computerized and versatile manufacturing process ideal for rapid prototyping and on-demand production. Here are the custom CNC services available at our factory.

Rapid Prototyping

With our instant quotation platform and strong capacity, you can get excepted prototypes in short lead times. This allows you to quickly test prototype parts and get them to market.

Low-volume pilot production

Low-volume pilot production is critical to bridging the gap between part design and actual product launch. Do not worry. Our dedicated engineering team is ready to provide practical design advice for your small batch machined parts.

On-Demand Production

Our full service for on-demand production orders ensures that you get high precison and high standard of quality products. Enhanced production rate also allows for just-in-time delivery of production parts.

Materials for Custom CNC Machining Parts

A numebr of materials can be used in CNC machines, giving you various of options to complete rapid prototyping to production runs of custom complex parts. For your manufacturing needs, we provide instant quotatios of 100+ metals and plastics, and even you can compare prices for different machining materials.
Aluminum is a highly ductile metal, making it easy to machine. The material has a good strength-to-weight ratio and is available in many types for a range of applications. Price: $ Lead Time: < 10 days Tolerances: ±0.125mm (±0.005″) Max part size: 200 x 80 x 100 cm More Details>>
Copper displays excellent thermal conductivity, electrical conductivity and plasticity. It is also highly ductile, corrosion resistant and can be easily welded. Price: $$$ Lead Time: < 10 days Wall Thickness: 0.75 mm Tolerances: ±0.125mm (±0.005″) Max part size: 200 x 80 x 100 cm More Details>>
Brass has desirable properties for a number of applications. It is low friction, has excellent electrical conductivity and has a golden (brass) appearance. Price: $$ Lead Time: < 10 days Wall Thickness: 0.75 mm Tolerances: ±0.125mm (±0.005″) Max part size: 200 x 80 x 100 cm More Details>>
Stainless steel is the low carbon steel that offers many properties that are sought after for industrial applications. Stainless steel typically contains a minimum of 10% chromium by weight. Price: $$ Lead Time: < 10 days Wall Thickness: 0.75 mm Tolerances: ±0.125mm (±0.005″) Max part size: 200 x 80 x 100 cm More Details>>
Titanium has a number of material properties that make it the ideal metal for demanding applications. These properties include excellent resistance to corrosion, chemicals and extreme temperatures. The metal also has an excellent strength-to-weight ratio. Price: $$$ Lead Time: < 10 days Wall Thickness: 0.75 mm Tolerances: ±0.125mm (±0.005″) Max part size: 200 x 80 x 100 cm More Details>>
Plastics are also very popular option for CNC machining because of its wide choices, relatively lower price, and significantly faster machining time needed. We provide all common plastics for CNC machining services. POM PEEK HDPE PET Nylon PTFE PVC PP ABS PC PMMA

Surface Finishes of CNC Machining Services

CNC machining leaves visible tool marks during the removal of part of the block surface to create the desired shape.
Original processing: Clean and clean, without any treatment, this is the most popular and cost-effective way of internal functional parts. Fine and uniform toolpaths are also suitable for aspect parts.
If you need to improve the appearance of your machined parts, choose a finish for your custom parts.

CNC Finishes

1. Anodizing: Type II creates a corrosion-resistant finish. Parts can be anodized in different colors—clear, black, red, and blue are most common—and are usually associated with low silicone element series of aluminum. Type III is thicker and creates a wear-resistant layer in addition to the corrosion resistance seen with Type II.

2. Bead Blasting: The part is left with a matt appearance. A range of 120 to 320 beads allows us to create different roughness on the surface.

3. Powder Coating: 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.

4. Electroplating: Electroplating can be functional, decorative or corrosion-related. Many industries use the process, including the automotive sector, in which chrome-plating of steel automobile parts is common.

5. Polishing: Polishing is the process of creating a smooth and shiny surface, either through physical rubbing of the part or by chemical interference. The process produces a surface with significant specular reflection, but in some materials is able to reduce diffuse reflection.

6. Brushing: Brushing is a surface treatment process in which abrasive belts are used to draw traces on the surface of a material, usually for aesthetic purposes.

CNC Machining Tolerances

With a wide range of CNC machines, we are able to provide stand tolerance CNC machined parts with the most economic price and super precision machined parts for high-end products. When working with us, we guarantee all parts will be made accordingly to your specification. If 2D drawings are not available, you can also indicate with ISO 2678 as well. Click to review the table of the ISO 2678 tolerance standard.

Tolerance Standard
Tolerance Lever Overall Dimension Range
Specifications <<3, >0.5 <<6, >3 <<30, >6 <<120, >30 <<400, >120 <<1000, >400 <<2000, >1000
F ±0.05 ±0.05 ±0.1 ±0.15 ±0.2 ±0.3 ±0.5
M ±0.1 ±0.1 ±0.2 ±0.3 ±0.5 ±0.8 ±1.2
C ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 ±2 ±3
V ±0.5 ±1 ±1.5 ±2.5 ±4 ±6

Precision CNC Machining for Metals & Plastics

In addition to standard tolerance CNC parts such as ISO2678M or ISO2678F, We also offer high-precision CNC machining parts. With high-precision milling & turning machines, we are able to catch super-tight tolerance for prototype machining & production. After being in the manufacturing industry for over 10 years, we discovered a simple formula to produce precision parts Precision machines + Precision heart = Precision parts. We have a wide range of CNC machines and experienced engineers who never compromise tolerance or part quality.
Precision CNC Machining for Metals

When looking for precision machining services, you can’t afford to compromise on the quality if you want to manufacture high-quality parts.

Precision CNC Machining for Plastic

With us, you will find a wide range of precision CNC machining services, an experienced team of experts, and extensive experience of how to best approach different projects using 3-, 4-, and 5-axis CNC machines. We offer CNC milling, CNC turning, EDM, wire EDM, and surface grinding services and can handle all the technical aspects of creating your prototypes and parts, allowing you to focus on bringing your product to the market.

Why Choose Our Custom CNC Machining Service


Our engineers have accumulated rich and in-depth experience in previous CNC machining projects, so they can handle complex and precision parts in multiple industries without problems.

Advanced Equipment

Our company has extensive in-house equipment for both manufacturing and testing. Your parts will be manufactured and inspected with our advanced in-house equipment, including HAAS 3-, 4-, and 5-axis CNC milling Machines, Hexagon CMM, and Olympus XRF analyzer

Fast delivery

On average, CNC machining parts we return quotation within 24 hours, finished parts are shipped in 7 days or less, and we have 99% on-time delivery rate and quality rate..

Typical CNC Machining Parts That We Offer

We machine custom parts for customers in multiple plastic and metal materials, from rapid prototypes, low-volume production to mass production orders.
Check out our gallery that shows precision machined prototypes and parts from our valued customers.

Our CNC Machining for Various Industrial Applications

We works with leading manufacturers from different industries to support growing demands and streamline their supply chain. The digitalization of our custom CNC machining services helps more and more manufacturers bring their idea to products.
Regardless of the manufacturing process used to create the end-use part, our CNC machining service is widely used by designers as a means of creating early and late-stage prototypes with short turnarounds times. CNC prototyping allow designers to rapidly iterate ideas without tooling costs or waiting times. It is one of the best ways to create concept model and function prototype to verify the design. Compared with other rapid prototyping methods, rapid CNC machining allows us to get tight tolerance prototypes in real materials fast. CNC Prototyping is the preferred option to bring new design life among the other rapid prototyping methods, unless the products are designed for 3D printing or other methods only.
CNC machining and EDM are the main methods to fabricate metal tooling for injection molding, high pressure die casting, blow molding, roller molding, stamping, blending and so on. High speed CNC machines allow us to make high precision copper patterns, mold cavities, mold base, lifter and other mold components in very short term. Moreover, with 5 axis milling machines, we can mill the deep pocket features in hours which take days to make by EDM in the past. That’s how we can speed up the mold making process significantly. Check out how rapid tooling works.
CNC machining has for several years been an integral part of aerospace manufacturing. That’s partly down to the extremely high precision of CNC machines, making the process suitable for safety-critical parts that will be used on aircraft. Machinable aerospace parts include prototype engine components, fuel panels, landing gear components and engine mounts.
In the automotive industry, utilizing a CNC machining service is the most popular way to create concept cars as well as the function testing components, such as lighting, engine, transmission & steering system. It is also widely used to produce high volume automotive parts and post-machining the die casting parts, investment casting parts. It is especially useful for custom automotive parts, which may be required for repairs or for limited-edition luxury vehicles, since it is too costly to make few parts by molding process.
The machinability of many grades of titanium and stainless steel makes CNC machining services widely used in healthcare, with the process regularly used to create implants, medical devices and surgical tools such as scalpels. Tight tolerances and fast turnarounds are especially important for items such as titanium hip implants, which should be tailored to a patient’s anatomy.
Though injection molding dominates the production of simple plastic parts, many off-the-shelf goods are created with CNC machining. Household goods and appliances often contain machined parts, while items like enclosures and fixtures are also suitable for the process. Goods like sporting equipment may also be CNC machined. The CNC machining of metal and plastic components plays a big role in the electronics industry. Items such as laptop casings, connectors and sockets can all be reliably made with a CNC machine.
The application of robotics is prominent in several industries and continues to grow. Our advanced manufacturing processes and extensive production capabilities will help you stay relevant in the competitive market. Here are some robotics applications RapidDirect can make with you:
  • Grippers
  • Housings and fixtures
  • Arm components
  • Robotics assemblies
  • Networking technology
  • Autonomous vehicles
  • Animatronics
  • Commercial and defense robotics

Frequently Asked Questions

We can accommodate the prototyping and production of large machined parts, plastic or metal. Our maximum CNC machining build envelope is 2000 mm x 1500 mm x 300 mm — suitable even for large-scale parts such as furniture and architectural components.
We can provide critical tolerance according to your actual demand. For CNC machining, we manufacture metal parts as per ISO 2768-m and plastic parts as per ISO 2768-c. Please note that the higher tolerance needed, the cost will be higher.
We can serve more than 10000 pcs of different prototypes monthly, no matter the part with simple or complex design. We own 120 CNC machines and have more than 100 experienced technical experts.
The cost of your CNC machining projects is not fixed as it depends on the characteristics of your project such as the design, and tolerances. Machining times of the material to be used in the project also contribute to this pricing. For example, if you’re making a part that has a combined machining and material cost of $2 and a setup cost of $200, one part will cost $202. However, if you make 200 parts, each would cost $3!
CNC machining is a fast, accurate and versatile solution for making end-use plastic and metal parts in any quantity, without the need for investing in hard tooling or expensive set-ups. No matter how simple or complex the parts.
CNC machining is a manufacturing technique for removing material. It uses sharp cutting tools, available in a variety of shapes and sizes, which are precisely controlled by a computer. CNC stands for Computer Numerical Control.
CNC machining starts with a computer, on which designers prepare a part using CAD (Computer-aided Design) software. This digital part is then converted into a format that can be recognized by a CNC machine. Instructions are sent to the CNC machine in the form of “G-Code” after which the machine can start cutting. Most CNC machines have a “worktable” and work holding device to keep a block of material — known as the “workpiece” — in place. The worktable may or may not move, depending on the style of the machine. When machining starts, the cutting tool makes contact with the workpiece, cutting away layers of material. The tool and/or workpiece is moved and/or rapidly rotated according to the G-Code instructions so that cuts are made in exactly the right places until the part is finished.
CNC machines include CNC mills, CNC turning machines (or lathes), CNC routers, and Electrical Discharge Machining (EDM) machines. CNC mills have rotating cutting tools that are moved to different areas of the workpiece to make cuts and can be used to make many different pats. CNC lathes work the other way, rotating the workpiece against a stationary cutting tool, and are used to make cylindrical parts. CNC routers are similar to CNC mills, but have less power and cannot cut the hardest materials. They can, however, be faster than CNC mills. EDM uses electrical discharges (sparks) instead of a sharp cutting tool to cut material. No physical contact is made between the tool and the workpiece. CNC machines are often defined by their number of axes. More axes mean they can move their tool and/or workpiece in a greater number of ways, giving greater cutting flexibility and the ability to make more complex parts in a shorter time.
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