CNC Milling

Custom CNC Milling Services

Our CNC milling services offer efficient and precise machining for various materials. With advanced machinery and experienced professionals, we deliver high-quality results tailored to your specifications.

Our capabilities include 3-axis, 4-axis, and 5-axis machining, allowing us to create complex geometric shapes accurately. We work with various materials, including aluminum, red copper, stainless steel, steel, titanium, and plastics. Whether you need rapid prototyping or custom production runs, our team ensures that your parts meet your strict requirements—so partner with us for reliable CNC milling services that bring your designs to life with precision and efficiency.

  • Versatile Material Compatibility
  • Precision with Advanced Capabilities
  • In-House Expertise
CNC Milling -

What’s CNC Milling Process?

The CNC milling process is a manufacturing method that utilizes computer numerical control (CNC) machines to shape complex parts and components. It involves several key steps, starting with the design of a 3D model using computer-aided design (CAD) software. The CAD model is then converted into machine-readable instructions through computer-aided manufacturing (CAM) software, which specifies the tool paths and operations for machining.

Once the setup is complete, the CNC milling machine removes material from the workpiece using rotating cutting tools. The machine precisely follows the programmed instructions to achieve the desired shape and dimensions. This process allows for intricate designs, tight tolerances, and repeatability.

CNC milling machines can perform various operations on a wide range of materials, including drilling, milling, facing, and contouring. The process offers high accuracy, efficiency, and versatility, making it suitable for rapid prototyping and large-scale production.

Our Qualification for CNC Milling Service

As a leading provider of CNC milling services, JIAHUI possesses the qualifications and expertise to deliver exceptional results. Our team is well-equipped to handle various projects, utilizing advanced equipment and technologies. With a focus on precision and efficiency, we ensure that each CNC milling project meets the highest quality standards.
Our extensive experience covers various industries, including automotive, electronics, aviation, agriculture, medical, machinery, and hardware.

We can meet diverse requirements, from intricate interior components in the automotive sector to precise electronic product casings. We utilize cutting-edge equipment, including vertical, horizontal, and 5-axis CNC milling machines. This allows us to accommodate complex geometries and achieve greater control and flexibility in machining operations.

Furthermore, we offer additional surface processing options such as anodizing, sandblasting, plastic spraying, electroplating, polishing, and brushing to provide the desired finishing touches to your CNC-milled parts. JIAHUI is the ideal choice for all your CNC milling needs, thanks to our expertise, commitment to quality, and dedication to customer satisfaction.

Manufacturing Process

CNC milling is a meticulous machining process that starts with designing a computer-aided design (CAD) model. Next, the CAD data is translated into a CNC program. A milling machine with rotating cutting tools removes material from a workpiece to make the desired shape. This automated process ensures high accuracy.

CNC Milling Manufacturing Process -
Material Weight Size Limit Surface Finish Tolerance
Aluminum 10g-500KG 2000mm×1000mm×600mm Ra3.2µm~1.6µm(0.8µm achievable if specified) ±0.01mm~0.1mm
Copper 10g-500KG 2000mm×1000mm×600mm Ra3.2µm~1.6µm(0.8µm achievable if specified) ±0.01mm~0.1mm
Stainless Steel 10g-500KG 2000mm×1000mm×600mm Ra3.2µm~1.6µm(0.8µm achievable if specified) ±0.01mm~0.1mm
Steel 10g-500KG 2000mm×1000mm×600mm Ra3.2µm~1.6µm(0.8µm achievable if specified) ±0.01mm~0.1mm
Titanium 10g-500KG 2000mm×1000mm×600mm Ra3.2µm~1.6µm(0.8µm achievable if specified) ±0.01mm~0.1mm
Plastic 10g-500KG 2000mm×1000mm×600mm Ra3.2µm~1.6µm(0.8µm achievable if specified) ±0.05mm~0.1mm

Our CNC Milling production Capabilities

Our CNC milling production capabilities are extensive. We boast a range of state-of-the-art milling machines equipped with multi-axis functionality, enabling us to handle complex geometries precisely. Our skilled operators and cutting-edge technology ensure high-quality components, rapid turnaround times, and the ability to meet diverse manufacturing needs.

Materials for CNC Milling Parts

Our CNC milling capabilities extend to a comprehensive array of materials, ensuring versatility in component production. We work with metals such as aluminum, copper, stainless steel, carbon steel, and titanium, guaranteeing durability and precision. Additionally, our proficiency extends to thermoplastics, allowing us to meet the requirements of various industries.

  • Aluminum
  • Copper
  • Stainless Steel
  • Carbon Steel
  • Titanium
  • ABS
  • POM
  • PC
  • PA
  • PP


The distinctive characteristics of aluminum make it one of the best materials for die-casting. The major aluminum alloys are A360, A380, A390, A413, ADC12, and ADC1. Among all, the A380 is the most worthwhile aluminum alloy.


  • Excellent corrosion resistance
  • Lightweight
  • High strength and hardness
  • Outstanding thermal conductivity
  • High electrical conductivity
  • Remarkable EMI and RFI shielding properties



Copper is a reddish-orange metal with a face-centered cubic structure that is highly valued for its aesthetics. It exhibits remarkable properties, yet, it can be alloyed with different elements, such as aluminum, tin, zinc, nickel, etc., to improve its characteristics further. The following are some fundamental properties of copper that make it ideal for producing die-casting parts.


  • Very soft
  • An excellent conductor of heat and electricity
  • Good corrosion resistance
  • High ductility
  • Fine malleability


Stainless Steel

Stainless Steel

Stainless steel is metal-enriched with chromium elements (11%) and a small amount of carbon. Chromium offers corrosion resistance to stainless steel. Due to this, the die-cast parts are less likely to be affected by rust or corrosion. It can be easily molded into several forms. Thus, manufacturers prefer it for the die-casting process.


  • Extremely durable
  • High tensile strength
  • Corrosion resistant
  • Easy fabrication and formability
  • Low maintenance cost


Carbon Steel

Carbon Steel

Carbon steel is famous for its low cost and versatile nature. Typically, carbon steel is divided into three categories, i.e., low-carbon, medium-carbon, and high-carbon steel. The properties of these types differ according to the carbon content present in the material. Low-carbon steel is known for its good machinability and weldability, whereas high-carbon steel is used in high-strength applications.


  • Very hard
  • Ductile and malleable
  • Relatively low tensile strength
  • Good machinability
  • Low cost




Titanium is a silver-grey transition metal often used for manufacturing high-strength parts. It is relatively soft when present in its pure form. However, adding certain elements like iron, aluminum, and vanadium makes titanium harder. The properties of titanium make it a perfect choice for manufacturers to use for die-casting parts.


  • Extremely high tensile strength
  • Lightweight
  • High corrosion resistance
  • Able to withstand extreme temperatures
  • High melting point
  • Excellent oxidation capabilities




ABS is a thermoplastic material known for its strength, impact resistance, and toughness. It is widely used in various industries for its excellent mechanical properties, ease of processing, and versatility. ABS is commonly found in applications such as automotive parts, toys, electronics, and household appliances.


  • High-impact resistance and toughness
  • Good dimensional stability
  • Excellent chemical resistance
  • Easy to process and mold
  • Versatile and used in various applications, including automotive, electronics, and consumer goods.




POM, also known as acetal or Delrin, is a high-performance engineering thermoplastic known for its excellent strength, stiffness, and dimensional stability. It has low friction, good wear resistance, and is resistant to moisture, chemicals, and solvents. POM is commonly used in mechanical and precision parts, automotive components, and electrical applications.


  • High strength and stiffness
  • Low friction and wear resistance
  • Excellent dimensional stability
  • Good chemical resistance
  • Low water absorption


PC -


PC is a durable and transparent thermoplastic material known for its high impact resistance and optical clarity. It has good electrical insulating properties, excellent dimensional stability, and can bear a wide range of temperature. PC is commonly used in safety glasses, automotive components, and electronic enclosures.


  • High impact resistance
  • Optical clarity
  • Good dimensional stability
  • Electrical insulation
  • Wide temperature range


PA -


PA, commonly known as nylon, is a versatile thermoplastic material with excellent mechanical properties. It offers high strength, toughness, abrasion resistance, good chemical resistance, and dimensional stability. PA is widely used in various industries for applications such as electrical components, consumer goods, and automotive parts.


  • High tensile strength and toughness
  • Good chemical resistance
  • Low friction and wear resistance
  • Excellent dimensional stability
  • Good thermal stability


PP -


PP is a thermoplastic material known for its high chemical resistance, low density, and good thermal stability. It is lightweight, rigid, and has excellent moisture resistance. PP is commonly used in automotive parts, packaging, laboratory equipment, and various consumer products due to its versatility and cost-effectiveness.


  • High chemical resistance
  • Low density
  • Excellent moisture resistance
  • Good thermal stability
  • Versatile and cost-effective


Surface Treatment For CNC Milling Parts

We provide a range of surface treatments for CNC milling parts, including anodizing, bead blasting, powder coating, polishing, and electrophoresis. These options enhance aesthetics, corrosion resistance, and functionality, ensuring our components meet diverse specifications and requirements.



Anodizing_CNC Milling -

Anodizing improves corrosion resistance, enhancing wear and hardness and protecting the metal surface. This surface finish is widely used in mechanical parts, aircraft, automobile parts, and precision instruments.

Aluminum, Magnesium, Titanium, Zinc

Clear, Black, Grey, Red, Blue, Gold, White, Silver, purple

Smooth, Matte finish

Bead Blasting

Bead Blasting_CNC Milling -

Bead blasting results in parts with a smooth surface with a matte texture. It is used mainly for visual applications and can be followed by other surface treatments.

ABS, Aluminum, Brass, Stainless Steel, Steel


Smooth, Matte finish


Galvanizing_CNC Milling -

Galvanizing is a surface treatment that applies a protective zinc coating to the surface of iron or steel. This process helps prevent corrosion by creating a barrier between the metal and outside environment.

Low-Carbon Steel, Low- Alloy Steel


Smooth, Matte or Gloss finish

Powder Coating

Powder Coating_CNC Milling -

Powder coating is a type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint, which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light.

Aluminum, Magnesium, Titanium, Zinc, Copper, Stainless Steel, Steel

Black, Grey, White, Yellow, Red, Blue, Green, Gold, Vertical stripe

Smooth, Matte finish


Electroplating_CNC Milling -

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

Aluminum, Magnesium, Titanium,Zinc, Copper, Stainless Steel, Steel

Clear, White, Black, Grey, Red, Yellow, Blue, Green, Gold, Silver, Bronze

Smooth, Semi-matte, Matte finish


Polishing_CNC Milling -

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

Aluminum, Magnesium, Titanium, Zinc, Copper, Stainless Steel, Steel


Smooth, Mirror finish


Blankening_CNC Milling -

Blackening is a standard method of chemical surface treatment that creates a layer of oxide film on the surface of metal to isolate the air and prevent the rust.

Stainless Steel, Steel


Smooth, Matte finish


Brushing_CNC Milling -

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.

Aluminum, Magnesium, Titanium, Zinc, Copper, Stainless Steel, Steel, ABS


Smooth, Matte finish


Electrophoresis_CNC Milling -

Electrophoresis is a process in which charged resin particles (ions) in a solution are moved by an electric field and deposited on a metal surface to form a protective coating.

Aluminum, Magnesium, Titanium, Zinc, Copper, Stainless Steel, Steel

Black, Grey, White, Yellow, Red, Blue, Green, Gold, Silver, Purple

Smooth, Matte finish


Painting_CNC Milling -

Painting is especially suitable for the surface of the primary material of metal. It will strengthen the material's moistureproof& rust prevention functions and enhance its compression resistance and internal structural stability.

Aluminum, Magnesium, Titanium, Zinc, Copper, Stainless Steel, Steel

Black, Grey, White, Yellow, Red, Blue, Green, Gold, Silver, Purple

Smooth, Matte finish

Excellent CNC Milling Services

For excellent CNC milling services without compromising your CNC parts, contact JIAHUI today and elevate your precision manufacturing needs.

Typical CNC Milling Products

CNC Milling -

FAQs Related To CNC Milling

A: The maximum size of CNC milling depends on several factors, including the specific machine's capabilities, the size of the worktable, and the available travel distances of the machine's axes. CNC milling machines come in various sizes and configurations, so no definitive maximum size applies to all machines. However, larger CNC milling machines can typically handle larger workpieces.

In general, CNC milling machines can accommodate workpieces with dimensions ranging from a few centimeters to several meters in length, width, and height. Small CNC mills may have worktables with dimensions around 30 cm x 30 cm, while larger industrial-grade CNC milling machines may have worktables that exceed 3 meters in length and width.

It's important to note that the specific requirements of the machining operation also influence the maximum size of CNC milling. The size and complexity of the desired part, as well as the machine's available tooling and cutting capabilities, will affect the maximum size that can be effectively milled.

When considering the maximum size of CNC milling, it's advisable to consult the specifications and capabilities of the specific CNC milling machine you are using or considering for your machining needs.

A: The tolerance of CNC-milled parts refers to the allowable deviation or variation in dimensions between the desired or specified measurements and the actual measurements of the finished part. Tolerance is an essential aspect of CNC milling as it determines the precision and accuracy of the machined parts.

The tolerance of CNC-milled parts can vary depending on several factors, including the specific machining operation, the part's complexity, the material being machined, and the capabilities of the CNC-milling machine itself. Tolerances are typically specified in terms of a plus/minus (+/-) value or a range of acceptable measurements.

CNC milling generally can achieve tight tolerances, which is usually within a few thousandths of an inch (0.001 inches or 0.0254 millimeters). However, it's important to note that achieving tight tolerances requires careful consideration of various factors, such as machine calibration, tooling selection, cutting parameters, and material properties.

The desired tolerance for CNC-milled parts should be determined based on the application's specific requirements and the part's functionality. For example, precision components used in aerospace or medical industries may require very tight tolerances, while other applications may have more lenient tolerances.

When working with a CNC milling machine, it's crucial to communicate the required tolerances accurately to the machine operator or programmer. This ensures that the machining process is set up correctly and that the finished parts meet the desired specifications.

It's worth noting that achieving tighter tolerances often requires more advanced and precise machining techniques, which may impact the cost and production time. Therefore, it's essential to balance the desired tolerances with the practical considerations of the project.

A: The processing ability of CNC milling refers to the capabilities and limitations of a CNC milling machine in terms of the materials it can work with, the complexity of parts it can produce, and the range of machining operations it can perform.

CNC milling machines are versatile and can machine a wide variety of materials, including metal (such as aluminum, steel, titanium, and brass), plastics, composites, and even certain types of wood. The specific material and properties will determine the cutting tools, cutting speeds, and feeds used in machining.

Regarding part complexity, CNC milling machines can produce simple to highly complex parts with intricate geometries. The machines are equipped with multiple axes (typically 3-axis, 4-axis, or 5-axis configurations) that allow for precise and simultaneous movement of the cutting tool along different directions. This enables the creation of complex shapes, contours, pockets, holes, and threads.

CNC milling machines can perform various machining operations, including face milling, contour milling, drilling, tapping, thread milling, and pocket milling. The specific operations performed depend on the tooling and cutting parameters for the machining process.
It's important to note that the processing ability of a CNC milling machine can be influenced by factors such as the machine's rigidity, power, spindle speed, and tooling. More advanced and high-performance CNC milling machines may have additional features, such as high-speed spindles, automatic tool changers, and probing systems, further enhancing their processing capabilities.

When considering the processing ability of CNC milling, it's essential to match the project's requirements with the machine's capabilities. This includes considering factors such as the desired parts' size and complexity, the machined material, the required tolerances, and the available tooling options.

A: Lead times for CNC milling can vary based on a number of factors, including the complexity of the part, the number of parts required, material and tool availability, and the workload of the CNC milling service provider.

The delivery time for CNC milling ranges from a few days to several weeks. For simple parts with straightforward geometry and low quantities, it's possible to have a relatively fast turnaround time. However, more complex parts or larger quantities may require additional programming, setup, and machining time.

Communicating your specific project requirements and delivery timeline with the CNC milling service provider is essential. They can provide you with an estimate of the delivery time based on their current workload and capacity.

Some CNC milling service providers may offer expedited or rush services for urgent projects. However, it's important to note that expedited services may come with additional costs.

To ensure a faster delivery time, it's beneficial to provide the CNC milling service provider with clear and detailed specifications, 3D CAD models, and any other necessary information upfront. This helps minimize any potential delays or modifications that may occur during processing. Ultimately, the fastest lead time for CNC milling depends on the requirements of your project and the capabilities and workload of your CNC milling service provider.

A: G code and M code are both programming languages used in CNC (Computer Numerical Control) machining to control the movements and operations of the machine. Here's the difference between the two:

  1. G code (Geometric code): G code is used to control the geometric movements of the machine, such as cutting tool paths, positioning, and feed rates. It specifies the coordinates and motions in a Cartesian coordinate system. G codes are used to control actions like linear and circular interpolation, rapid positioning, tool changes, and coolant control. Examples of G codes include G01 (linear interpolation), G02/G03 (circular interpolation), G00 (rapid positioning), and G43 (tool length compensation).
  2. M code (Miscellaneous code): M code controls miscellaneous machine functions, such as spindle start/stop, coolant on/off, tool changes, and machine tool positioning. M codes are used for actions unrelated to the geometry of the part being machined. Examples of M codes include M03 (spindle start clockwise), M05 (spindle stop), M06 (tool change), and M08/M09 (coolant on/off).

In summary, G code primarily controls the motions and geometries of the CNC machine, while M code controls miscellaneous functions and machine tool positioning. These codes are usually written in a CNC program and executed sequentially by the machine to perform the desired machining operations.

A: The main difference between horizontal milling and vertical milling lies in the orientation of the spindle and the way the workpiece is positioned on the machine. Here's a breakdown of the differences:

  1. Spindle orientation: In horizontal milling, the spindle is positioned horizontally and parallel to the work table. It is mounted on a horizontal arbor, allowing the cutting tool to be positioned horizontally. The spindle is placed vertically in vertical milling, perpendicular to the worktable. This vertical orientation allows for using end mills and other tools that cut in a vertical direction.
  2. Workpiece positioning: In horizontal milling, the workpiece is typically positioned on the worktable, which can be moved in multiple axes (X, Y, and Z). The workpiece is secured on the table using clamps or fixtures. In vertical milling, the workpiece is also positioned on the worktable, but it is usually fixed in place using clamps or a vise. 
  3. Cutting operations: Horizontal milling is often used for heavy-duty cutting operations, such as milling large surfaces or slots because the weight of the workpiece is evenly distributed over the worktable. It is also suitable for machining multiple sides of a workpiece in a single setup. Vertical milling is commonly used for smaller, more precise cutting operations, such as drilling holes or creating intricate shapes. It is also used for functions that require the workpiece to be held vertically, such as milling keyways or grooves.
  4. Machine design: The design of horizontal milling machines typically features a horizontal spindle, a fixed worktable, and a sliding or rotating arbor. Vertical milling machines, on the other hand, have a vertical spindle, a fixed or adjustable worktable, and a tool-holding platform (quill) that moves up and down.

The choice between horizontal milling and vertical milling depends on the specific application, the size and shape of the workpiece, and the desired machining operations. Each milling machine type has advantages and is suitable for different machining requirements.

A: While CNC milling offers numerous advantages, there are also some potential disadvantages to consider. Here are a few:

  1. Cost: CNC milling machines can be expensive to purchase, install, and maintain. They require specialized training for operators and programmers, which adds to the overall cost.
  2. Complexity: CNC milling requires knowledge of programming languages (such as G code) and software to operate the machine effectively. Programming can be complex and time-consuming, especially for intricate or custom parts.
  3. Limited flexibility: CNC milling machines are designed for specific tasks and may need to be more easily adaptable to new or different machining requirements. Modifying the machine setup or changing the cutting tools can take time and effort.
  4. High skill requirement: Skilled operators and programmers are needed to operate CNC milling machines efficiently. The learning curve can be steep, and errors in programming or operation can lead to costly errors or damage to the machine or workpiece.
  5. Maintenance and downtime: CNC milling machines require regular maintenance and calibration to ensure accuracy and performance. Any machine breakdown or malfunction can result in production delays and increased costs.
  6. Limitations in size and complexity: CNC milling machines have size and weight limitations, restricting the size of the workpieces that can be machined. Complex geometries or intricate designs may also pose challenges for CNC milling.
  7. Initial setup time: Setting up a CNC milling machine for a new job or part can be time-consuming, involving tasks such as tooling, work holding, and programming. This setup time can impact production efficiency, especially for small batch or one-off jobs.

Despite these disadvantages, CNC milling remains a widely used and robust machining process that offers high precision, repeatability, and automation capabilities. Proper training, planning, and maintenance often mitigate the disadvantages.

A: CNC milling machines and CNC lathes are two different machine tools used for machining operations, but they have distinct differences in their functions and the types of processes that could be performed. 

1.Operation Principle:

  • CNC Milling Machine: CNC milling machines use rotating cutting tools in order to remove material from an object. Cutting tools move along multiple axes to form complex shapes, contours and features on workpieces. The object remains stationary and the cutting tool performs the action.
  • CNC Lathe: A CNC lathe, on the other hand, operates by rotating the workpiece while a stationary cutting tool removes material. The cutting tool moves along multiple axes to shape and cut the workpiece into the desired form. The workpiece rotates, and the cutting tool performs the operations.

2.Types of Operations:

  • CNC Milling Machine: A CNC milling machine is versatile and capable of performing various machining operations, including cutting, drilling, slotting, and threading. It is suitable for creating complex 3D shapes, pockets, and contours on multiple materials.
  • CNC Lathe: A CNC lathe is primarily used for turning operations, where the workpiece rotates, and the cutting tool shapes the material to create cylindrical shapes, such as shafts, threads, and grooves. Some CNC lathes may also have additional capabilities, such as live tooling, which allows for milling and drilling operations during turning.

3.Workpiece Orientation:

  • CNC Milling Machine: In a CNC milling machine, the workpiece is typically held stationary and secured to the machine's table or work-holding devices. The cutting tools move in multiple axes to shape and machine the workpiece.
  • CNC Lathe: The workpiece is clamped and rotated on a spindle in a CNC lathe—the cutting tool moves along multiple axes, allowing for the shaping and machining of the rotating workpiece.

4.Machining Capabilities:

  • CNC Milling Machine: CNC milling machines are suitable for machining various materials, including metals, plastics, and composites. They are capable of producing intricate and precise parts with complex geometries.
  • CNC Lathe: CNC lathes are primarily used for machining cylindrical parts from various materials, including metals and plastics. They are best suited for producing parts with rotational symmetry, such as shafts, bushings, and threaded components.

Both CNC milling machines and CNC lathes have their advantages and are used in various industries depending on the specific machining requirements. The choice between them depends on factors such as the desired part geometry, material properties, and the machining operations' complexity.

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