What is cnc metal machining?

Metal CNC Machining

CNC metal machining is a high-precision and high-efficiency metal processing method that uses computer numerical control technology to accurately control the movement of machine tools to achieve cutting, drilling, milling and other operations on metal materials. This method allows us to manufacture complex-shaped metal parts and ensures a high degree of automation and accuracy in the machining process.

Classification of Metals Used in CNC machining

CNC Machining can be applied to a wide range of metallic materials, each with unique physical and chemical properties suitable for different applications. Here are some common categories of metals used in CNC machining:

  • Aluminum and Aluminum Alloys:Aluminum is a lightweight metal with good thermal conductivity and ductility. Aluminum alloys, on the other hand, offer higher strength and corrosion resistance, commonly used in aerospace, automotive, and electronic products.
  • Stainless Steel: Stainless steel is known for its corrosion resistance and high strength, making it suitable for medical instruments, cookware, and architectural components.
  • Steel: Steel is a widely used metallic material with high strength and good machinability. Different types of steel exhibit varying mechanical properties, suitable for various industrial applications.
  • Copper and Copper Alloys: Copper is renowned for its excellent electrical and thermal conductivity, commonly used in electrical and electronic applications. Copper alloys, on the other hand, provide additional strength and corrosion resistance.
  • Titanium and Titanium Alloys: Titanium is a lightweight yet strong metal with excellent corrosion resistance, widely used in aerospace, medical, and chemical industries.

Advantages and Challenges of CNC Metal machining


  • High Precision: CNC processing allows for precise control of machine tool movements, achieving micrometer-level accuracy.
  • High Efficiency: CNC machines can operate continuously, significantly improving production efficiency, especially for large-scale production.
  • Versatility: CNC machines are capable of processing complex shapes, satisfying designers’ creative needs.
  • Automation: CNC processing reduces manual intervention, lowering the operational difficulty and labor intensity.


  • Equipment Cost: CNC machines and their supporting equipment can be expensive, posing a financial burden for smaller enterprises.
  • Technical Requirements: CNC processing requires skilled personnel for programming and operation, posing a challenge in terms of human resources.
  • Maintenance Cost: CNC machines require regular maintenance and servicing to ensure their smooth operation and prolong their lifespan.

Surface Finish and Post-Processing Options for Metal Parts

The surface finish of metal parts is crucial for their performance and lifespan. The surface finish can be controlled through machining and post-processing techniques. Common post-processing options include:

  • Sandblasting: This process involves spraying abrasive material onto the surface of the part to remove impurities, oxides, and roughen the surface for improved adhesion and coating properties.
  • Brushing: Using specialized brushing tools, a unique texture and gloss are created on the surface of the part, enhancing its visual appeal.
  • Polishing: This involves the use of polishing machines or polishing compounds to smoothen and brighten the surface of the part, achieving a high level of surface finish.

Additionally, there are surface treatment techniques such as electroplating and painting that can be applied based on the specific requirements and applications of the metal parts.

Benefits of CNC machining for Metal Manufacturing

CNC processing brings numerous benefits to metal manufacturing, including:

  • Improved Production Efficiency: CNC machines enable automated and continuous production, significantly enhancing production efficiency.
  • Consistent Product Quality: Precise numerical control programs ensure high accuracy and consistency in the manufactured products.
  • Reduced Production Costs: Although the initial investment in CNC machines may be high, their high efficiency and precision lead to cost savings in the long run.
  • Meeting Diverse Demands: CNC processing is capable of manufacturing complex metal molds, satisfying the diverse needs of the market.

Application of CNC metal

CNC metal processing is widely used in various fields. The following are some typical application scenarios:


In the aerospace field, CNC metal processing is used to manufacture complex-shaped metal parts such as aircraft and rockets to ensure high precision and reliability.

Car manufacturer

A large number of metal parts are required in automobile manufacturing, and CNC metal processing can achieve fast and precise production and improve the quality and performance of automobiles.

electronic product

In the field of electronic products, CNC metal processing is used to manufacture metal casings and structural parts for mobile phones, computers and other equipment to improve the appearance and durability of the products.

medical instruments

Medical devices require extremely high precision and reliability, and CNC metal processing can meet these requirements and produce high-quality medical devices.

MachCNCMaster’s Metal CNC Machining Services

MachCNCMaster’s metal CNC machining services cover a wide range of machining operations such as metal cutting, drilling, milling, bending and so on. Through the precise control of CNC machine tools, it can ensure that the position and speed of each machining point are optimized, which greatly improves productivity and manufacturing accuracy. Whether it’s single piece or complete production, mold making or component machining, MachCNCMaster can provide excellent solutions!

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