CNC Machining  Services For Global Companies

  • Fast quotation and DFM feedback
  • Parts shipped in as little as 2 days
  • Tolerance as tight as ±0.02 mm
  • Price advantage

CNC Machining Services

Siedery offers precision CNC machining services including CNC turningCNC milling, EDM, wire EDM and surface grinding. Combined With our precision 3-, 4- and 5-axis CNC machining centers, and our  extensive experience in servicing multinational projects, we can machine all types of parts in all metals and plastic materials. Whether you require small batches prototypes or high-volume production parts, we will be your best option. We are positioned to serve small and medium-sized enterprises worldwide and guarantee to manufacture parts from quotation to machining in a few days!

CNC milling scenes 2022

CNC Milling

CNC milling is a machining process that uses computer-controlled and rotating multi-point cutting tools to progressively remove material from a workpiece to produce a custom-designed part or product. The process is suitable for machining a variety of materials such as metals and plastics. CNC milling, particularly 5-axis milling, can be used to create complex 3D shapes, allowing the creation of many different types of complex geometric part features including holes, curves, slots, mitred shapes and channels. Milling is also ideal method for creating pressure castings and plastic injection molds.

CNC turning scenes 2022

CNC turning

CNC turning is one of the widely used CNC machines. It is mainly used for cutting internal and external cylindrical surfaces of shaft parts or disc parts, internal and external conical surfaces of any taper angle, complex rotating internal and external surfaces as well as cylindrical and conical threads. It can also be slot,ream and bore holes. CNC turning is a more efficient method than CNC milling, and Siedery's turning capabilities can cover parts from prototype to mass production.


The Advantages of Our CNC Machining Services

Services worldwide


More than 50 countries served
3D printing equipment


Over 500 CNC machines
3D printing factory scene


Over 20,000 square metres of manufacturing space.
3D printing services for users


Over 150,000 users have been served
Daily Active Users


Over 100,000 active users per day.
3D printed parts per year


Over 15,000,000 parts are manufactured each year.
CNC Machining Centers

Why would you need to choose us from a large number of CNC machining service providers? Here are the top 4 reasons.

1. Experience
Our project managers and engineers have extensive experience in multinational services, so they are able to solve problems encountered during the project advancement process and smoothly handle complex and precise parts for multiple industries.

2. Advanced equipment

Siedery has an extensive range of in-house equipment for manufacturing and testing. Your parts will be manufactured and tested on our state-of-the-art equipment including 3-, 4- and 5-axis CNC milling machines and advanced measurement system.

3. Cost saving

With efficient management, strong component machining capabilities and strict cost control, we are always able to offer lower price for the same level of component machining.

4. Fast delivery
We quote you within 24 hours on average and parts are shipped in 5 days or less, we can do it!

After Four Simple Steps, The Product Will Soon Reach Out To You.

We will assist you in the whole process from product design, verification to mass production to ensure high-quality delivery.

Upload a CAD File

To start, simply fill in a few information and upload a 3D CAD file.

Quote & Design Analysis

You'll receive a quote shortly, and we'll send you design for manufacturability (DFM) analysis if necessary.

Order Confirmation

Once you review the quote and place your order, we'll start the manufacturing process. We also offer finishing options.

Parts are Shipped!

Your customized parts will be checked and sent directly to your door after confirming that there is no problem.

Applications of CNC Machining

Design & Rapid Prototyping
Consumer Products
CNC machining has been widely used by designers to manufacture end-use parts. It is widely popular as a means of creating prototypes in early and late new product development stages for short production cycles. Allowing designers to quickly iterate on the sensory involvement without the cost of tooling or waiting longer, CNC prototyping is one of the best ways to create concept models and functional prototypes to validate designs. In contrast to other rapid prototyping methods, rapid CNC machining allows us to quickly obtain the closest parts to the final mass production version including near-realistic materials and tight tolerances.
Rapid Prototyping
The aviation industry has very high and even strict requirements for the structural design, functionality, performance, product quality and reliability of its products. A large number of new materials and structures are first applied to aircraft components. Defence needs and market competition require significantly shorter development cycles and production cycles for aerospace products. In addition, the average cost of the final product needs to be constantly reduced, thus it demands higher aerospace manufacturing technologies. Modern CNC machining is a key part of advanced manufacturing technology and has become a decisive key technology.

User interface panels, assembly tools and fixtures, vibration test fixtures, aerospace structures and sensor housings, engine components, fuel panels, landing gear components and engine mounts can be machined.
CNC machined aerospace -parts
In recent years, the speed of economic development has accelerated, the processing of automotive parts and manufacturing technology have been also developed rapidly. CNC machine tools in recent years in the automotive parts manufacturing process has been vigorously promoted and greatly meet the market requirements of today's more competitive machinery manufacturing industry, but also effectively reduce production costs, so the emergence of CNC technology has achieved the goal of multi-category, small batch, small-scale, high-efficiency production.

Commonly machined components: engines, cylinder blocks, pistons, crankshafts, cylinder heads, gearbox housings, bearings, gears, etc.
Automotive parts machining
The machinability of titanium and stainless steel has made CNC machining as a widely used machining method in the medical field. The process is often used to manufacture medical devices, human implants and tools for surgical use, such as scalpels.

Tight tolerances and fast turnaround are particularly important for items such as titanium hip implants, which are customized to the patient's specific needs.
CNC machining of medical product parts
Although injection moulding predominates in the mass production of plastic parts, many off-the-shelf items are actually manufactured using CNC machining. Sports equipment such as outdoor sports are also often machined using CNC. CNC machining of metal and plastic parts plays an important role in the consumer electronics industry such as laptop housings, connectors, sockets and parts for household appliances all being machined with CNC.
CNC in consumer applications 2022

CNC Machining Materials & Finishes

Before you consider using CNC machining to manufacture your parts, you must know what kind of materials and surface treatments to apply to your CNC machined parts. Siedery is not only a processing factory, but also has excellent surface treatment and finishing partners which can complete various types of finishing for prototype parts and production parts. Need to customize CNC parts with high-quality appearance? Siedery provides you with the best service.

Materials commonly used for CNC machining

CNC Materials

Plastic: ABS,Acetal,CPVC,Delrin (POM),HDPE,LDPE,Nylon,PEEK,PEI,PET,PMMA,Polycarbonate,Polypropylene ,PPSU,PS,PSU,PTFE,PVC,Acrylic,Delrin,PPS,UHMW,Ultem
Metal:Aluminum,Brass,Copper,Stainless Steel,Steel Alloy,Steel Mild Low Carbon,Titanium,Bronze,Cast Iron.Learn more about CNC metal materials...

For more plastic materials to be processed, please contact our team.

CNC Finishes

Powder Coating
Bead Blasting

Anodizing gives high corrosion resistance, high hardness, high adsorption capacity, very good insulating properties, and very high heat resistance.

The powder spraying process uses automatic reciprocating spraying coupled with manual replenishment spraying to avoid missing spraying on dead corners of the workpiece, to enhance the uniformity of the spraying thickness and to improve the anti-corrosion performance of the product.

Electroplating is the process of using electrolysis to coat the surface of certain metals with a thin layer of other metals or alloys. It is a process of using electrolysis to attach a metal film to the surface of metals or other materials to prevent corrosion, improve wear resistance, electrical conductivity, reflectivity and aesthetics.

Polishing is a processing method that uses mechanical, chemical or electrochemical action to reduce the surface roughness of a workpiece in order to obtain a bright, flat surface. It is a finishing process on the surface of the workpiece using polishing tools and abrasive particles or other polishing media.

The main purpose of brushing is to remove oxidation, rust marks and machined burrs from the surface of the part, to produce a regular, fine fillet pattern on the surface of the part or to obtain a wrought surface appearance without light. Brushing does not change the geometry of the part. Commonly used brush wheels are generally made of steel wire, brass wire and other materials, sometimes other materials are used for special purposes.

The process of cleaning and roughening the surface of the substrate by using the impact of the high speed sand flow, so that the surface of the part obtains a certain degree of cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, therefore increasing the fatigue resistance of the workpiece, increasing the adhesion between it and the coating, extending the durability of the coating film and also facilitating the leveling and decoration of the coating.

Metal Finishing Processes 2022

We are trusted by

General Electric Company 2022
faw-vw in 2022
dongfeng trucks 2022

See why our customers trust us

Trust comes from good service and quality delivery of parts on time.
I was dubious about my initial collaboration with Siedery as I had not worked with them before. I tried to send them some very challenging, high tolerance CNC machined parts with the aim of having a look at them. The communication went well, the team at Siedery were very professional and I received the samples within a very short time and I was blown away by the quality and accuracy of the parts. I am really pleased with this professional service from them. We have been working very well together over the years and have recommended several friends to place orders with them.


We have been ordering CNC parts from Siedery for over 4 years. Before working with Siedery, I was often frustrated by the lack of reliable suppliers until I came across Siedery and was completely overwhelmed by the quality of their machining and service. We have always received accurate quotations very quickly after sending in a request for quotation, which has helped our business so much that we are happy to stick with Siedery for the long term and would recommend them to my friends in the industry.


I have been working with another CNC machining company in China for 2 years, the service was very good at the beginning, but as the orders increased there were quality problems and delayed in delivery, I chose to give up after no result in communication. Siedery has been a great help to me over the past 5 years. My business in the USA is getting better and better because I have met such a reliable supplier Siedery.

I am very grateful for the help I have received from Siedery over the past 5 years and we will be working together more and more.


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Technical overview about CNC

What is CNC Machining?

CNC is an automated machine tool equipped with a programmed control system, also known as a CNC machine tool or CNC lathe. It is mainly used for large-scale machining of parts in the form of external turning, boring, turning of surfaces, etc. It can be programmed and is suitable for mass production, with a high degree of automation in the production process. CNC machines are widely used in the manufacturing industry, especially in the automotive, aerospace and military industries.

About the CNC Machining Process

CNC, or computer numerical control machining, is a subtractive manufacturing method that leverages a combination of computerized controls and machine tools to remove layers from a solid block of material. The desired cuts in the metal are programmed according to corresponding tools and machinery, which perform the machining task in an automated fashion.

How Does CNC Machining Work?

According to the technical requirements of the parts processing and process requirements, write the processing program of the parts, and then input the processing program to the numerical control device, and the numerical control device would control the machine tool spindle movement, feed movement, tool replacement, as well as the clamping and unclamping of the workpiece, cooling, lubrication pump on and off, so that the tool, workpiece and other auxiliary devices would be in strict accordance with the sequence, trajectory and parameters specified in the processing program, thus producing parts that meet the requirements of the drawings.

CNC machining is available for a wide range of materials, most commonly aluminium, steel, brass, ABS and nylon. In practice, however, CNC machining can be carried out on almost any hard material.

CNC vs 3D Printing

3D printing is an additive technology and CNC machining is a subtractive technology, so they are very different in terms of materials.

The main materials used in 3D printing are liquid resin (SLA), nylon powder (SLS), metal powder (SLM), gypsum powder (full colour printing), sandstone powder (full colour printing), wire (FDM), sheet (LOM) and so on. Liquid resins, nylon powders and metal powders make up the vast majority of the market for industrial 3D printing.

The materials used for CNC machining are all piece by piece, that is, sheet materials, which are measured by measuring the length, width, height + wear and tear of the part and then going to cut the corresponding size of the sheet for machining.

Compared to parts manufactured by additive methods (3D printing), CNC machined parts are functionally stronger and usually have a higher production quality and surface finish. For this reason, CNC machining is usually used in the mid to late stages of development, when parts are ready for testing, functional accuracy, high volume production.

Types of CNC Machining

Depending on the type of part to be machined, there are different types of CNC machines best suited to the job. CNC milling utilizes a CNC milling machine which consists of a multi-axis system (three, four or five axes, depending on the complexity of the part). CNC turning involves a lathe, usually with two axes, which uses circular motion to cut the workpiece. Electric discharge machining machines (EDM) uses electric sparks to shape the workpiece into the desired shape. Hobbing is another machining process and is used to cut gears, splines and sprockets. Other CNC machine types include plasma cutting machines and water jet cutting machines.

CNC Design Considerations

CNC design, with only a few words, actually contains the mastery of CNC machine tools and lathe processing technology, mastering this point will master most of the content of machining. It is recommended that before designing the process of CNC lathe, you should know the whole processing process well, you can go to the workshop in advance to see more, do not easily write down, and wait until you have a number of things in mind before you can finish it in one go, otherwise the process design will cause a laughing stock. It is not surprising that the initial design stage will encounter similar problems, but as long as you think hard, read more and learn more, you will quickly master it.

CNC Machining FAQ

What are the advantages of CNC machining?

The primary advantages of CNC machining include rapid prototyping and the ability to produce full-scale production parts quickly. It offers a high level of precision and accuracy in manufacturing parts and allows for tight tolerance machining for CNC parts of all sizes. It also offers maximum flexibility across volume, pricing, lead times, and the range of materials and finishes being used.

What are the different types of machining processes?

The two primary CNC machining processes are CNC turning and CNC milling. Other machining processes include drilling, gear hobbing and electrical discharge machining, among others.
CNC milling can be used to create complex 3D shapes, and CNC turning is mainly used for cutting internal and external cylindrical surfaces of shaft parts or disc parts.

What industries use CNC machinery?

Industries that use CNC machining include aerospace, automotive parts manufacturing, medical machine manufacturing, transportation, defense, and marine industries, along with oil and gas industries and electronics. CNC machining has allowed these industries to become more efficient at mass-producing custom CNC parts.

What are standard machining tolerances?

The standard machining tolerance is ± 0.005" or 0.13mm. Tolerances are the allowable range for a dimension. If a CNC machining tool has a tolerance of ± 0.01 mm this means that the machining tool can have a deviation of 0.01 mm in every cut. With a drawing, Siedery's CNC machining service can produce CNC parts with tolerance as low as ± 0.0002 in. Without a drawing, all CNC parts are produced to our ISO 2768 medium standard. We can also machine to tighter tolerances, ±0.025mm or ±0.001", with an attached engineering drawing calling out critical features.

How does CNC machining differ from traditional machining?

As technology continues to develop, there is an increasing demand for precision machining in the industrial manufacturing industry, so CNC machining is widely off the main. What is the difference between CNC machining and traditional machining, Siedery shares with you from the following five aspects.

  • First, the processing process is different
    Compared with the traditional machining process, both positioning reference, clamping methods, tools, cutting and other aspects can be simplified, in addition, even if the same processing task is the same, CNC machining process can also have more than one program. The process has the characteristics of diversity, which is a more obvious difference between the two.
  • Second, the difference between clamping and fixtures
    In the traditional machining process, due to the machine tool itself processing capacity is limited, so in the processing requires special fixtures for multiple clamping, which leads to high production costs of traditional machining. While the positioning of the CNC machining process can be debugged by instruments, no special fixtures are required. So the relative cost is lower.
  • Third, the choice of different tools
    Compared with traditional machining, CNC machining process of higher requirements for the tool, after the use of high-speed cutting CNC machining to improve processing efficiency, but also to ensure the quality of processing, effectively reduce the probability of cutting deformation, shorten the processing cycle.
  • Fourth, the processing method
    Traditional machining process can not be accurately controlled, and not easy to use. And CNC machining, the use of processing methods become feasible, in addition, in CNC machining, circular interpolation, post-processing and CNC trimming methods to replace the traditional hole positioning processing of filling method, empty knife method and trimming method.
  • Fifth, cutting parameters.
    In the traditional machining process, in the process of operating the machine tool, often rely on their own experience to operate, so it is easy to make mistakes. To reduce the rate of scrap, the choice of cutting parameters is very important. CNC machining uses a control system to control the movement of the machine tool, and the machining process is controlled by the program.

In short, on the basis of traditional machining processes, CNC machining technology has become the main development direction of the modern machining industry. It not only continues the current processing methods of CNC lathes as well as ordinary lathes, but also effectively absorbs the mature technology and processing methods of the traditional machining process.

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CNC machining case pictures
CNC machining case pictures 2022

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Founded in 2011, Siedery provides a one-stop shop for additive manufacturing and small-batch manufacturing services for small and medium-sized enterprises worldwide. We are experts in the CNC machining, injection molding, and 3D printing industries.
Building A3, Fuhai Information Port, Shenzhen, Guangdong, China
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