What is the Difference Between CNC Milling And CNC Turning?
2025-09-12
Understanding the fundamental difference between CNC milling and CNC turning is crucial for selecting the right manufacturing process for your project. While both are computer-controlled subtractive manufacturing methods, they operate on distinctly different principles and produce unique part geometries.
CNC milling utilizes a rotating multi-point cutting tool that moves across a stationary workpiece to remove material. It is ideal for creating complex shapes, slots, holes, and flat surfaces. In contrast, CNC turning, performed on a lathe, involves a stationary cutting tool that removes material from a rotating workpiece. This process is best suited for creating cylindrical or conical parts like shafts, bolts, and bushings.
Key Differences: Process and Geometry
The core distinction lies in the movement. In our factory, we program our CNC Milling machines for multi-axis movement (X, Y, Z), allowing for highly complex and asymmetric parts. The workpiece is fixed to a table, and the spindle moves around it. Turning is defined by the rotation of the workpiece (the C-axis) against a single-point tool, which is primarily moved along the length and radius of the part, making it perfect for concentric components.
Our Capabilities and Product Parameters
At our factory, we operate a range of advanced machines to deliver precision for both processes. Our CNC Milling services feature multi-axis machining centers capable of handling diverse materials with tight tolerances.
Machine Specifications Comparison
| Parameter | CNC Milling Machine | CNC Turning Center |
| Table Size | 1000mm x 500mm | - |
| Swing Diameter | - | 500mm |
| Travel (X, Y, Z) | 800mm x 500mm x 500mm | - |
| Maximum Turning Length | - | 750mm |
| Spindle Speed | 12,000 rpm | 3,500 rpm |
| Control System | Siemens 828D | Fanuc Oi-TF |
| Positioning Accuracy | ±0.005mm | ±0.005mm |
Machine Features Comparison
| Feature | CNC Milling | CNC Turning |
| Workpiece Movement | Stationary | Rotates |
| Cutting Tool Movement | Rotates and moves along multiple axes | Stationary or moves linearly |
| Typical Part Geometry | Complex, asymmetric, flat surfaces | Cylindrical, conical, concentric |
| Primary Tools | End mills, face mills, drills | Single-point turning tools, boring bars |
| Best For | Parts with complex features, slots, pockets | Rounds, shafts, tubes, rings |
Frequently Asked Questions (FAQs)
Q1: What is the difference between CNC milling and CNC turning in terms of cost?
The cost depends on part geometry and production volume. Generally, turning is a faster and more economical process for simple cylindrical parts. Milling, with its complex toolpaths and setups, often incurs a higher cost for intricate components. At KGL, we analyze your design to recommend the most cost-effective process.
Q2: Can a single part require both milling and turning operations?
Absolutely. Many complex components are manufactured using a combination of both processes. For instance, a part might be initially turned to create its basic cylindrical form and then moved to a milling machine to add keyways, flats, or drilled holes. Our facility is equipped to provide complete turnkey solutions with both CNC milling and turning under one roof.
Choosing the Right Process with KGL
Selecting between milling and turning hinges on your part's design, material, and application. With decades of experience, KGL provides expert guidance to ensure your project is manufactured with optimal efficiency and precision. Our advanced machinery and skilled technicians guarantee the highest quality output. For a detailed consultation and quote, contact KGL Machinery & Electronics Co., Ltd. today. Let our expertise in precision machining bring your designs to life.
