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CNC Milling vs Turning: How to Choose the Right Process
A practical engineering guide to selecting CNC milling, CNC turning or a combined process.
The Basic Difference
CNC milling usually holds the workpiece while rotating tools remove material. It is suitable for flat surfaces, pockets, slots, holes and complex multi-face features.
CNC turning rotates the workpiece while cutting tools shape round features. It is commonly used for shafts, bushings, pins, sleeves and threaded parts.
When Milling Makes Sense
Choose milling when the part has rectangular geometry, multiple faces, pockets, mounting holes, milled profiles or features that are not rotational. Milling is common for brackets, plates, housings and fixture components.
When Turning Makes Sense
Choose turning when the part is mainly cylindrical or rotational. Turning is often efficient for diameters, grooves, threads and concentric features.
When a Combined Route Is Needed
Some OEM components need both turning and milling. A shaft may need flats, cross holes or milled slots. A housing may need turned bores after milling. The right process route depends on datum strategy, tolerance and quantity.
Related pages: CNC milling parts, CNC turning service, Swiss-type machining, and robotics applications.
FAQ
Is turning always cheaper than milling?
No. Cost depends on geometry, material, tolerance, setup time and quantity.
Can SZCROWN suggest the process?
Yes. Process selection can be reviewed from drawings, material requirements and production expectations.