CNC Milling Metal & Plastic Parts

From single 1pcs Prototype to Mass Production

CNC Milling Service at 3Q MACHINING

3Q Machining offer CNC milling service in China for any types of custom CNC milling parts, whatever plastics or metals, simple or complex. With our precision 3-, 4- and 5-axis CNC milling centers, combined with other advanced capabilities and our experienced team, we can offer high-quality CNC parts as well as fast delivery. We guarantee your CNC milling projects will be handled smoothly by our in-house CNC department, which means your team can focus on bringing your product to market. 

Typical CNC Milling Parts That We Offer

CNC milling is very flexible way and high precision machining manufacturing to create prototype or manufacture high volume end-used cnc milling parts. Plus wide ranges of milling materials are available, it fit most types of projects. Our CNC experts know how to cut your parts fast to reduce the cost, and how to mill the complex geometry with tight tolerence in different materials. We have delivered million+ high quality CNC parts to our worldwide customers.

CNC milling parts are used in a wide range of industries. From the aerospace industry to the medical industry, there are a number of uses for CNC milling parts.

Here are the lists of main applications of CNC Milling Parts:

1. Medical Industry: In the medical industry, cnc milling parts are used for surgical guides and prosthetic devices.

2. Aerospace Industry: The aerospace industry relies on cnc milling parts for manufacturing aircraft components and landing gear systems.

3. Automotive Industry: CNC milling parts are used in the automotive industry to manufacture engine blocks, transmission cases, cylinder heads and other components.

4. Construction Industry: CNC milling parts can be used in construction as well as they can be used to make things like door frames.

5. Prototyping: The first application is prototyping. Prototypes are often used by engineers and designers as a way to test their designs before they are finalized. CNC milling can be used to quickly produce prototypes with a variety of materials, often at a fraction of the cost of traditional prototyping methods like 3D printing or injection molding.

6. Custom Machined Parts: In many cases, customers will have custom parts that need to be produced in small batches for trial order to test market.

cnc precision machining
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Mold Component

CNC milling is playing key role in most of mold making, especially precise injection, die-casting mold tooling.

cnc milling valve part

Metal Valves

Parts like valves, engine house which require complex geometry and tight tolerance by out 5 axis CNC milling.


Medical Part

CNC milled implants in medical-grade material. We are familiar with bone fracture plate and other components which can be used in surgery.

Types of cnc milling machines and how it works?

CNC mills 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.

3-axis cnc milling machine: Standard CNC mills have 3 axes, allowing the spindle (and attached cutting tool) to travel along the X, Y and Z axes. If the cutting tool cannot reach an area of the part, the part must be removed and manually rotated.

4-axis milling machine: Some CNC mills incorporate an extra degree of movement by rotating on a vertical axis. This enables greater flexibility and the ability to create more complex parts.

5-axis cnc milling: The most advanced type of widely used CNC mill is the 5-axis mill, which incorporates two extra degrees of movement, often by adding rotation to both the worktable and spindle. Parts usually don’t require multiple setups, since the mill can manipulate them into different positions.

Why custom cnc milling parts are expensive?

The cost of CNC milling parts depends on the material, the quantity, and the complexity of the part. The more complex and bigger the part, the higher it will cost. For example, a small part made out of aluminum costs less than a large part made out of steel. The complexity also affects the cost as well as it will take longer to complete if there are more features on it. A rough estimate for machining materials like aluminum or steel would be around $25-$45 per hour while it would be around $70-$85 for machining titanium parts.

In general, custom CNC milling parts are expensive because they are custom made. Your company will have to invest a lot of money and time in the design phase, as well as the manufacturing phase. You will need to outsource the custom parts from a cnc machining manufacturer whom needs to invest expensive machines and hire skilled employees who can operate it.

Custom CNC milling is not for everyone, but if you want a product that is truly unique and differentiates your company from all the other competitors, then this is the way to go.

The advantages and disadvantages of cnc milling

CNC milling has been around for a while and is still going strong. It’s a versatile manufacturing process that can produce a variety of shapes, making it an advantageous choice for many companies.

1) Cost-effective: Machining with CNC machines is more cost-effective than other machining methods, such as turning or grinding. This is because it takes less time and fewer tools to produce the same amount of material as other machining processes require. Tooling cost save, cutting tools are much less expensive for CNC milling than for conventional machining like injection molding and casting, which means the overall cost is cheap for small volume or mid-volume machining part production.

2) High quality surface parts: CNC milling produces high quality parts because the machines are precise and can cut materials from any angle, which creates smooth surfaces that are free of burrs or roughness. This eliminates the need for additional finishing steps like sanding or polishing.

3) High precision: A CNC milling machine can make components precisely to the desired dimensions and specifications. This makes it possible for manufacturers to make parts that are more accurate, which in turn reduces the need for subsequent machining operations.

4) Complexity: It’s possible to create more complex shapes with CNC milling than with conventional machining and manual machining.

5) Speed: The speed of CNC milling is much faster than that of conventional machining, which means it’s possible to produce more parts in the same amount of time as with conventional machining methods.

6) Labour save: cnc milling can save labour cost with less manual operation.

7) Less error and waste: cnc milling is precision and automatic operation that can have less error by manual operation then can save material waste which caused by faulty parts.

CNC milling has been a popular manufacturing process for years. It is one of the most efficient processes in the industry. But it also has its disadvantages.

The first disadvantage is that it is expensive to set up and maintain a CNC milling machine. The second disadvantage is that CNC milling machines are limited to certain materials, which can be a problem if you need something other than metal or wood. The third and final disadvantage of CNC milling machining is that there are limitations on how much precision you can get with the process, which may not be what you want for your project.

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Our CNC Milling Capability

This video presents how we mill a precision and complex part from our CNC milling machines with different types of tools.

Our experienced engineers are able to select the right tools, optimize tool paths to cut fast and achieve good milling surface, as well as keeping tight tolerance. We can provide all types of custom CNC milled parts to meet your project needs.

If you are having any problem to get your CNC milling parts done, contact us and try to get a solution from 3Q Machining.

The Important Things You Should Know

CNC Milling - Questions & Answers

Plastic: ABS, PC, ABS+PC, PP, PS, POM, PMMA (Acrylic), PAGF30, PCGF30, Teflon, DHPE, HDPE, PPS, PEEK. 

Metal: Aluminum, Steel, Stainless Steel (17-4, Inconel 625 & 718), Magnesium, Titanium, Zinc, Brass, Bronze, Copper. 

These are the most common materials for CNC prototyping and production parts. Besides that, we can work with any type of machinable plastic and metal we can purchase from the stock market. 

What’s more: We are able to create a custom plastic block or bar for the material such as PA GF50, PPS GF50. To discover further plastic materials we can do, please contact our team.

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 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.

Color: Pantone Number

Logo: AI


Sample lead time: 7days

Tooling lead time: 35 days

Production lead time: 7~30days

Usually we book the shipment with your appointed forwarder, or can ship to your warehouse with our shipment company

We also working with DHL/FEDEX/UPS for  long term relationship to have competitive express shipment with fast delivery.

As-Machined: The most popular and cost efficient way for inner functional components. Fine and even tool path is also good for aspect parts.

Bead Blasted: The part is left with a matt appearance. Range of 120 to 320 beads allows us to create different roughness to the surface.

Anodized: Type II creates a corrosion-resistant finish. Parts can be anodized in different colors—clear, black, red, and blue are most common—and is 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.

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.

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.

3Q Machining is known as one of the best CNC machining companies in China in terms of quality, speed, and customer service. With high-quality CNC machines, we can easily achieve +/- 0.02mm of tolerance and can even get within +/- 0.01mm. But keep in mind that it can have an impact on the cost.

MOQ: From 1 piece to ~3000pcs each color each part

Sample payment: 100%

Tooling payment:50% deposit, 50% balance after sample approval

Product order payment: T/T 30% deposit, 70% after pre-shipment inspection

It’s no problem to arrange third party inspection before shipment, please book the inspection date 7 days in advance

CNC Machine Costs

Our Advantages of CNC Milling

1. Cost Efficient
80% of aspect and mechanical parts can be CNC milled within minutes or even seconds by optimizing the tool paths and using special cutting tools. With automation set up, CNC milling is super cost-efficient for mass production comparing with additive manufacturing in most of the cases.

2. Materials & Finishes Options
Besides of fast turnaround time, various type and spec of the plastic, metal block are available for milling, and different type of surface finishing is available for CNC milling parts, such as painting, anodizing and chroming. It’s great a combination of function and aspect.

3. Unlock Complexity
Because the cutting tool of a milling machine can approach the workpiece from several different angles, it is possible to create complex shapes CNC parts, with more axis, we can create parts of greater complexity. If a CNC project demands an irregular shape, milling is often the best option.

Overviews: CNC MILLING

What is CNC milling?

CNC milling is a particular form of precision machining in which a cutter removes material by moving into the workpiece at an angle. The movement of the cutter is controlled by computer instructions, allowing for extreme precision and repeatability.

Milling is different to CNC turning, another popular CNC service in which a single-point cutting tool is used to cut the workpiece from block or bar materials while it is rotated at speed in a chuck. Unlike milling, CNC turning is generally used to create round or tubular shapes.

CNC milling can be used for the rapid manufacture of either prototypes or end-use parts

How CNC milling works

Like other machining processes, CNC milling begins with designers creating a digital part using CAD (Computer-aided Design) software. The file is then converted into G-Code,” which can be recognized by a CNC mill.

CNC mills 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.

During the CNC milling process, the rapidly rotating cutting tool makes contact with the workpiece, cutting away material. The tool moves according to the G-Code instructions so that cuts are made in the right places until the part is finished. Some CNC mills use moving worktables to create a greater number of cutting angles.

CNC mills can cut through hard metals. This makes them more versatile than CNC routers, which are similar to 3-axis mills but less capable of penetrating hard materials.

CNC mills are different to CNC lathes or turning centers, where the workpiece rotates rather than the cutting tool.

Cutting tools for CNC mills

CNC mills can be fitted with different cutters / tools to enable different types of cutting. These include end mills, face mills, slab mills, fly cutters, ball cutters, hollow mills, roughing end mills and many others.

Why use CNC milling?

Besides CNC turning, CNC milling is one of the most popular custom manufacturing processes. CNC milling is used for the majority of machined parts because it can handle a wide variety of irregular geometries. It is also an efficient means of mass production once the setup is complete

What kind of equipment do you use?

3Q Machining’s facilities contain high-end 3-axis, 4-axis and 5-axis machining centers, including models from Haas and JingDiao.

Can I combine milling with other processes?

Yes. We can use a CNC machine to mill details, features and text onto parts made using other processes like casting and 3D printing.

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