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Home » Services » CNC Machining

Zhongde CNC Machining Process

CNC machining is a subtractive manufacturing process that involves removing part of a workpiece using instructions from a CAD model to make a product. The CNC machine removes parts of the workpiece by machining operations such as turning, drilling, or milling, according to codes (g-code and m-code) obtained from the CAD model and containing instructions on machining parameters.

Milling is a machining method in which a milling cutter is used as a tool for the surface of an object. Use a rotating multi-edge tool to cut the workpiece.

Turn is a method of cutting the workplece on the lathe by rotating the workpiece relative to the tool. Turning is suitable for machining revolving surfaces.

CNC Machining Materials

In addition to the general materials listed below, Zhongde, a reputable CNC machining company, providing CNC milling and CNC turning service, can also modify the materials according to the special needs of customers. Our professional engineers will adjust the raw material formula to meet the unique conditions of use.

The General plastic CNC Machining materials are listed below:

ABSPP | Polypropylene
Nylon 6POM | Delrin
PC | PolycarbonatePTFE


The general metal CNC machining materials are listed below:




Carbon Steel

Stainless Steel

Steel Alloy

CNC Machining Surface Finishing

CNC Machining Parts surface finish is critical to a successful part design and it is used for aesthetic and functional reasons in injection molded parts for engineering products. The surface finish improves the look and the feel of a product as the perceived value and quality of the product increase with a suitable surface finish.

Different grades of surface finishing chart.



Material Compatibility



as machined

As Machined

For as machined all sharp edges are removed and parts are deburred. Tool marks are visible.

All plastics and metals

Uniform matte of raw material color



A finishing CNC machining operation can be applied to the part to reduce its surface roughness. Machine marks are less evident but still visible.

All plastics and metals

Uniform matte of raw material color


Bead Blasting

Bead blasting adds a uniform matte or satin surface finish on a machined part, removing the tool marks. This is used mainly for visual purposes and comes in several different grits which indicate the size of the bombarding pellets.

All metals

Uniform matte of raw material color


Powder Coating

Powder coating is a strong, wear-resistant finish that is compatible with all metal materials and can be combined with a bead blasting to create parts with smooth and uniform surfaces and excellent corrosion resistance.

All metals

Black or any RAL code or Pantone number


Anodizing Color(Type II)

Type II anodizing is mainly used to produce parts with a uniform, aesthetically pleasing surface and provides good corrosion and limited wear resistance.

Aluminum alloys

Black, clear or any RAL code or Pantone number


Anodizing Hardcoat(Type III)

Type III anodizing provides excellent corrosion and wear resistance, suitable for functional applications.

Aluminum alloys

Black or clear



Electropolishing is an electrochemical process used to polish, passivate and deburr metal parts. It is useful to reduce surface roughness.

All metals

Natural metal color


Black Oxide

Black oxide is a conversion coating used to improve corrosion resistance and minimize light reflection.

Stainless steel and copper alloys



Chromate Conversion Coating (Alodine/Chemfilm)

Chromate conversion coating is used to increase the corrosion resistance of metal alloys while maintaining their conductive properties.

Aluminum and copper alloys

Clear or yellow



Brushing is produced by polishing the metal with grit resulting in a unidirectional satin finish. Not advisable for applications where corrosion resistance is required.

All metals

Natural metal color

our quality promise

Our Quality Promise

Zhongde is committed to providing quality products that meet or exceed the needs of our customers through continuous improvement.

Strictly follow the confirmed drawings or samples to produce. If there is any deviation, our company will replenish to our customers to make up for the loss.

What is CNC Machining?

Machining refers to the process of changing the dimensions or performance of the workpiece through mechanical equipment. Zhongde, a reputable fast CNC machining company in China, supplies high-quality 3d customized precision machining services, including CNC milling and turning. Through different machining methods by our factory, gradually change the shape, size, relative position, and performance of the blank until it reaches the processing process of the workpiece required by the customer.


Looking for a reliable, quick-turn supplier of machined plastic and metal parts and components? Zhongde is a trusted CNC machining and molding manufacturer in China, committed to offering different types of CNC machining and CNC operations such as our CNC turning service, with affordable prices and reduced cheap service costsWith 3-axis, full 5-axis machines, we can ensure to provide you with high accuracy and quality parts on time.


Types of CNC Operations

CNC machining operation services by Zhongde, a professional manufacturer in China, mainly include CNC milling for rough machining, turning for rotating surfaces, drilling for machining holes, planing for straight-shaped surfaces, and grinding for the cylindrical surface.

  • CNC Milling Service: Milling is mainly used for rough machining and semi-finish machining of various planes, various grooves, etc.


  • CNC Turning: Turning is a method of cutting the rotating surface of a workpiece on a lathe with a turning tool.


  • CNC Drilling: Drilling refers to the method used to machine holes. The drilling tool moves relative to the workpiece and feeds axially.


  • CNC Planing: Planning is a method of cutting on a planing machine using a planer and is mainly used to process straight-shaped surfaces.


  • CNC Grinding: Grinding is mainly used for finishing the inner and outer cylindrical surfaces, inner and outer conical surfaces, and planes, and forming surfaces of parts to obtain higher dimensional accuracy and smaller surface roughness.

Applications of CNC Machining

Our CNC machining service at a relatively cheap price is widely used in many different industrial situations. Such as consumer electronics, home appliances, agricultural machinery, automotive, and mine metallurgy, etc. Here are some examples of the exploitation of CNC machining benefits by professionals. They may bring inspiration to you and help with your own projects.

Why Choose Zhongde As A CNC Machining Company?

Zhongde, one of the leading CNC machining companies in China, is determined to provide customers with considerate CNC milling and CNC turning services that meet high standards. 

FAQ of CNC Machining

What types of CAD files are accepted?

We can accept most CAD file formats. (e.g. STEP, IGES, etc)

Do you offer any design services for a machined part?

For both our cnc machining service and injection molding service, we can provide drawings according to the samples, but the final design drawings should be approved and responsible by the customers.

What is the MOQ for CNC machined parts?

Usually, we don't set MOQ, but the more, the cheaper. Besides, we are happy to make prototype or sample for customers to ensure quality standard.

What materials can be used for CNC machining?

A wide range of materials can be used with precision CNC machining by Zhongde, a reputable company providing quality CNC service. Some commonly used materials include metals such as brass and stainless steel, various plastics like PP and PA.

How do you select the exact manufacturer for my parts?

As a reliable CNC machining supplier in China, specializing in OEM & ODM customized services, Zhongde, with advanced equipment and mature production system, provides high-quality cost-effective CNC molding and machining service for more than 50 countries.

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