Customizing CNC Machining Parts Production

TDL factory is ISO9001 certified, AS9100 certified, IATF16949 certified. We produce customizing CNC machined plastic & metal components, prototypes for automotive industry, aerospace industry, industrial automation industry, and robotics industry.

cnc machining factory CNC machined parts supplier

TDL support customers with CNC milling & CNC turning machined components production for prototypes and high-volume production.

customizing CNC machined plastic and metal parts supplier

TDL factory is equipped with two sets of Beijing JingDiao 5 axes CNC machines, which can machining highly precise components to achieve an accuracy of ±5μm.

TDL is equipped with 3 sets of high precision 5-axes CNC machines, and two sets of Beijing JingDiao 5-axes CNC machines.

We are capable of working on complex mechanical engineering and design, especially for precise machined automotive, aerospace motor parts and optical lens, reflector optatec, and LED array production.

CNC Machined Samples

CNC machined copper parts
CNC machined reflector optical reflector
CNC milling prototypes high-volume production

TDL is equipped with total 33 sets of high-speed CNC milling machines for machined parts manufacturing, 38 sets of lathe, 17 sets of CNC lathe. We are capable of precision and complex workpieces machining, and can reach tight tolerance of 0.01mm.

TDL production capability can support customers with high-volume machined parts production, and also support MOQ 1-2 pieces prototypes making. We provide fast delivery in 3-4 working days.

CNC Machining Design Guidelines and Capabilities

Our general guidelines for CNC machining include important design considerations, such as material type, dimensions, surface finishing, etc. They helps to improve part manufacturability, enhance cosmetic appearance, and reduce overall leadtime and manufacturing cost.

CNC machining materials–Plastic & Metal

  • ABS
  • Acetal
  • CPVC
  • HDPE
  • LDPE
  • Nylon
  • PEEK
  • PEI
  • PET
  • PMMA
  • Polycarbonate
  • Polypropylene
  • POM (Delrin)
  • PPSU
  • PS
  • PSU
  • PTFE
  • PVC
  • Aluminum
  • Brass
  • Copper
  • Stainless Steel
  • Steel Alloy
  • Steel Mild Low Carbon
  • Titanium

Maximum Dimensions & Minimum Dimensions

CNC Milling

(Maximum Dimensions)

  • 3-axis: 248mm x 175mm x 40mm to 254mm x 178mm x 96mm
  • 3-axis: 560mm x 350mm x 18mm to 560mm x 350mm x 98mm
  • 5-axis: 68mm x 75mm x 100mm

CNC Milling

(Minimum Dimensions)

6mm x 6mm, with nominal thickness 1.02mm

CNC Turning

(Maximum Dimensions)

Φ105mm x L230mm

CNC Turning

(Minimum Dimensions)

Φ4mm x L1.5mm

CNC machined metal parts general post-processing information

Heat treatment

Heat treatment is to heat the machined metal workpiece to a suitable temperature in a certain medium, and after maintaining it at this temperature for a certain period of time, it is cooled in different medium at different speeds, by changing the surface or internal microstructure of the metal material. A process in which structures are used to control their properties. Its purpose is to change the hardness, strength, wear resistance, electrical and magnetic properties of the metal. The overall heat treatment of steel generally has four basic processes: annealing, normalizing, quenching and tempering.


Polishing refers to the use of mechanical, chemical or electrochemical action to reduce the surface roughness of the workpiece to obtain a bright and smooth surface. It is the modification of the workpiece surface by polishing tools and abrasive particles or other polishing media.


Sandblasting is powered by compressed air to form a high-speed jet beam to spray materials (copper ore, quartz sand, emery, iron sand, Hainan sand) to the surface of the workpiece to be treated at high speed. The impact of the sand flow cleans and roughens the surface of the substrate. The process of changing the outer surface or shape of a workpiece.


The surface brushed treatment of machined parts is a surface treatment method that forms lines on the surface of the workpiece by grinding the product, which has a decorative effect. According to the different lines after brushed, it can be divided into: straight line brushed, random pattern brushed, corrugated pattern brushed, swirl pattern brushed.


Anodizing is an electrolytic oxidation process in which the surface of aluminum and aluminum alloys is usually transformed into an oxide film, which has protective, decorative and other functional properties, such as surface coloring, improving Corrosion resistance, enhanced wear resistance and hardness, protection of metal surfaces, etc.

Black oxide

The black oxide process, also known as the chemical oxidation process, immerses the processed parts in an oxidizing solution for a certain period of time, so that an oxide film is formed on the surface of the parts. This layer of oxide film can appear black, purple, blue, brown and so on. The appearance of the oxide film has a certain decorative effect, and the oxidation process has a certain anti-corrosion performance.


Spraying is a coating method that is dispersed into uniform and fine droplets by means of pressure or centrifugal force through a spray gun or disc atomizer and applied to the surface of the object to be coated. The spraying operation has high production efficiency and is suitable for industrial automation production. The application scope is mainly in the fields of hardware, plastics, furniture, military industry, ships and so on. Powder coating is popular in automotive industry.

Rolling process

Rolling processing is a kind of plastic processing method in which a high hardness and smooth roller is rolled into contact with the metal surface, and the surface layer undergoes a small amount of plastic deformation to improve the surface roughness.


Electroplating is the process of plating a thin layer of other metals or alloys on certain metal surfaces using the principle of electrolysis. So as to prevent metal oxidation (such as rust), improve wear resistance, electrical conductivity, reflectivity, corrosion resistance (copper sulfate, etc.) and enhance aesthetics.


The electrophoresis process is divided into anodic electrophoresis and cathodic electrophoresis. A process in which paint particles are deposited on the surface of a workpiece under the action of an electric field.


Etching, also known as photochemical etching, refers to the removal of the protective film in the area to be etched after exposure to plate making and development, and contact with chemical solutions during etching to achieve the effect of dissolution and corrosion, forming concave-convex or hollow molding effects.

PVD coating

Physical Vapor Deposition refers to the use of low-voltage, high-current arc discharge technology under vacuum conditions, using gas discharge to evaporate the target and ionize both the evaporated material and the gas, and use the acceleration of the electric field to make the evaporated material and its gas. The reaction products are deposited on the workpiece.
PVD technology is widely used in aerospace, electronics, optics, machinery, construction, light industry, metallurgy, materials and other fields. A film with properties such as conductivity.

Laser engraving

Laser engraving is a process of surface treatment using optical principles. The high-intensity focused laser beam emitted by the laser is at the focal point, the material is oxidized, and it is processed to show the desired etched graphics and text.

Make CNC MACHINING manufacturing FASTER

TDL covers 3-axis and 3+2-axis CNC milling and CNC turning plastic & metal components manufacturing. Due to our professional team and a large amount of equipment investment, TDL can efficiently help customers complete production. Rapid prototype can be completed within 3 days at the earliest.

TDL has rich experience in CNC machining, the parts we machined are bicycle components, racing car parts, automotive engine cover, aluminum motor shell, robotics components, shaft, LED reflector, etc.

We also help customers do surface finishing and post-processing for machined parts to achieve a high quality. As a certified factory, we are trustworthy and make more benefits for you.

Get instant quote for your CNC machining project

TDL machine rapid prototypes and high-volume production orders for customers in multiple industries: aerospace, automotive, defense, electronics, hardware startups, industrial automation, machinery manufacturing, medical devices, oil & gas and robotics.


Choose CNC milling or CNC turning?

Get to know more about CNC milling and CNC turning.


CNC milling is a subtractive manufacturing process that produces custom-designed parts or components by progressively removing material from the workpiece using 3-axis milling and 5-axis indexed milling machines by rotating multi-point cutting tools and computerized controls. These systems usually have three linear degrees of freedom. They can move freely around the X, Y, and Z axes while the workpiece remains stationary, to cut solid plastic and metal blocks into final parts. For complex components, will apply 5-axis moving. This limited dimensional operation reduces the speed of operations, making milling more suitable for prototype making and low-volume production runs.


CNC turning is a manufacturing process that involves holding bars of material in a chuck and rotating them while feeding a tool to the piece to remove material until the desired shape is achieved. The CNC turned part`s shape is cylindrical features from metal rod stock by live tooling that combines both lathe and mill capabilities. CNC turning is manufacturing through material removal, also known as subtraction machining. The speed of CNC turning operations makes it an ideal process for high-volume production runs with short lead times.

CNC machining applications

From functional prototypes to full production runs, CNC machining’s key industrial applications include:

Automotive Industry

CNC machined parts in automotive like automobile gearboxes housing and back cover, hydraulic parts for racing cars, new energy motor shells, screw, sleeve, can, bracket, engine impeller, wheel, etc.

Machinery Manufacturing

CNC machined parts in machinery manufacturing like gear, steel shaft, customized screw, sleeve, base support, bracket, hydraulic system components, engine connector, microscrope, etc.

Industry Automation

CNC machined parts for industry automation like fixture components, customized sleeve, filter case, metal connector, shaft, chain sprocket, valve, ring, rack, aluminum base, display panel, etc.

Security Industry

CNC machined parts in security like camera support, reflector, screw, LED array, remote control device components, light bracket, mounting rack, gear, alarm ring, gasket, aluminum base, customized sleeve, shaft, mounting bracket, etc.

Explore CNC machining new material news and industry updates

Find industry news, resources, insight into the CNC machining process, and more, on the TDL blog:

TDL Manufacturing Capabilities

TDL support customers with plastic mold manufacturing, Injection Molding, CNC machining, and other. Learn more about our manufacturing capabilities.