Professional China CNC Milling Services Manufacturer, Custom Aluminum, Brass, Plastic Milling Parts

CNC Milling Serivces

CNC Milling Services

Rally is a professional CNC milling services provider offering custom CNC milled parts for a variety of industries. Our advanced precision CNC milling services are dedicated to creating complex geometries on plastic and metal parts. We offer 3-axis CNC milling and 5-axis milling for high-speed CNC manufacturing as well as rapid prototyping.

Our Capabilities

CNC milling machines can produce parts in virtually any shape from soft metals (such as aluminum), hard metals (such as steel), and plastics (such as acetal). We support 3-axis, 4-axis, 5-axis milling, and right-angle milling capabilities to help you quickly create designs from simple straight lines to complex geometries.

Our experienced engineers are able to select the right tooling to quickly cut and obtain a well-milled surface while maintaining tight tolerances. This video shows how we mill a precise and complex part on a multi-axis milling machine. No matter what industry you belong to, RALLY has a custom CNC milled part for you. Please contact us and try to get a solution.

CNC Milling Material Options

We use 3-axis milling and 5-axis indexing milling processes to make parts from over 30 engineering-grade plastics and metals. Which CNC material for machining is best for your project depends on many factors, including price, machinability, corrosion resistance, strength, weight, and appearance.

cnc milling metal

Metal CNC Milling Services

Milling is a cutting process that uses a milling cutter to remove material from the surface of a workpiece. CNC milling machines are used to mill, engrave, cut, and drill holes in metallic materials. We have a wide variety of metal materials, metals used primarily for applications requiring high strength, hardness, and heat resistance, materials include carbon steel, aluminum, stainless steel, copper, and brass.

cnc milling plastic

Plastic CNC Milling Services

RALLY has powerful CNC milling capabilities to produce high precision parts from high specification industrial plastic materials. Advantages of CNC milling of plastics: tighter tolerances; small production runs; better pricing than injection molding. Commonly milled plastic materials include Nylon 6, PVC, PTEF, Teflon, Acetal, Delrin, Peek, and POM.

Our Advantages of CNC Milling

Over 10 years of experience and expertise in CNC milling services. More than 30 metal and plastic materials are available. OEM milling services. Precision Milling, Thread Milling, Metal Milling, Plastic Milling. State-of-the-art CNC milling centers and cutting tools to provide repeatable accuracy for your projects. Providing you with a comprehensive one-stop solution for rapid manufacturing.

Product Types

CNC Milling is ideally suited for machining complex or intricate parts, or basic parts for complex assemblies. Milling is suited to flat, curved, and variable bevel parts.

Available Materials

Rally offers a wide choice of materials for our on-demand CNC Milling services. The materials available:  brass, aluminum, stainless steel, steel alloys, copper, plastic.


At Rally Milling work to a tolerance of +/- 0.001 in. to +/- 0.005 in, with our advanced 5-axis machines achieving tolerances greater than +/- 0.0005 for very high-precision parts.

File Formats
  • AutoCAD (DWG)
  • DXF
  • IGES
  • JPG or JPEG
  • PDF
  • STEP
Milling Processes
  • Drilling
  • Reaming
  • Threading
  • Boring
  • Profiling
  • Tapping
  • Electronics Industry
  • Automotive Industry
  • Medical Industry
  • Marine Industry
  • Aerospace Industry
  • High-tech Industry

Send your 2D or 3D file, get started CNC Milling project!

CNC Milling Machine Processing Content

The versatility of the milling process allows it to be used in a wide range of industries and for a variety of part designs, including grooves, chamfers, threads, and recesses. The most common CNC milling operations include:

Plane Parts

face milling

Face milling is a milling operation in which the axis of rotation of the tool is perpendicular to the surface of the workpiece. Typically, face milling is used to create flat surfaces and contours on the finished part, producing a higher quality finish.

Form Milling

Form Milling

Form milling is a milling operation involving irregular surfaces and contours of parts with curved surfaces. The process uses form milling tools, such as convex, concave, and fillet tools.

Beveled parts

Angular Milling

Angular milling is a milling operation in which the axis of rotation of the tool is at an angle to the surface of the workpiece. The process uses a single-angle milling cutter to produce angular features such as chamfers, serrations, and grooves.

Holes And Threads

Holes and threads

The use of fixed-size tools for drilling, reaming, reaming, boring and tapping, etc., generally, CNC milling has boring, drilling, and reaming functions.

What Is CNC Milling
Rapid prototypes or end-use parts

What is CNC Milling

CNC milling is one of the most commonly used machining methods in the machining industry. The workpiece is fixed on the worktable with a fixed fixture. The tool enters the workpiece at a certain angle, removes material from the solid workpiece, and forms various complex geometric shapes and parts by drilling or cutting, including plane milling and contour milling. It can also be used for drilling, reaming, threading, and tapping, reaming, boring, and thread processing. The tool is controlled by a special computer, which greatly improves reliability and repeatability while reducing the possibility of human error.

How Does CNC Milling Work ?

The CNC milling process works by the machine reading the coded instructions and then putting them into operation. It all starts with the development of a 3D CAD file representing the final part. The completed design is exported to a CNC-compatible file format and converted by the CAM software into a CNC machine program, usually in G-code format, which is then used as an instruction to guide every movement of the machine.

Before operators run the CNC program, they prepare the CNC milling machine, secure the workpiece to the table, and connect the milling machine to the machine spindle.

Once the CNC milling process begins, the machine begins to rotate the cutting tool at speeds up to several thousand RPM. Depending on the type of milling machine used and the requirements of the milling application, as the tool cuts into the workpiece, the machine performs one of the following operations to produce the necessary cut in the workpiece.

  1. The workpiece is slowly fed into the stationary rotating tool.
  2. Move the tool on a stationary workpiece.
  3. Move the tool and workpiece relative to each other.

In CNC milling, the machine usually rotates with the cutting tool to machine a movable workpiece. A complete part needs to be machined several times to achieve the required accuracy and tolerances.

Different types of CNC milling machines

CNC milling machines are usually defined by the number of axes they have. More axes mean that complex workpieces can be machined with high precision and a high-quality finish, such as medical parts or aerospace components.

3-Axis: Simple geometries can be cut vertically (Z-axis) and in the X and Y directions using a 3-axis milling machine. However, it is often not possible to use a 3-axis milling machine for undercuts. Therefore, more complex designs may require more sophisticated milling machines.

4-Axis: On the basis of the 3-Axis, a rotary axis is added, generally 360° rotation in the horizontal plane. Through the rotation can make the product realize the processing of multiple sides, greatly improve the processing efficiency, reduce the number of clamping, and improve the production efficiency. Suitable for processing some box-type parts, mold processing, etc.

5-Axis: For the highly complex design of the five-axis milling machine, in the four-axis above and then a rotary axis, generally upright surface 360 ° rotation, five-axis has been able to comprehensive processing can achieve a clamping, can reduce the cost of clamping, reduce product scratches and bruises, suitable for processing some multi-station hole and plane, processing precision requirements of high parts, especially the shape of the processing precision requirements more stringent parts, such as medical equipment and aerospace parts.

  • Get Started Your CNC Milling Project!

    Send your 2D or 3D file. Contact us today to get an instant quote!

Learn more about our other capabilities

Our manufacturing capabilities: CNC machining, CNC turning, CNC milling, Die casting, Metal forging, Stamping, Plastic injection molding, Metal fabrication, Surface Finishing, Rapid prototyping, etc. 

cnc turning service

CNC Turning Services

metal finish

Surface Finishing

Rapid Prototyping

Rapid Prototyping

Die Casting

Die Casting

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