Rev Up Your Skills with the 2025 NIMS CNC Machining Challenge – Master the Machine!

The primary difference between a CNC lathe and a CNC mill lies in how the two machines process materials. In a CNC lathe, the workpiece is typically placed on the spindle and rotated against a stationary cutting tool. This setup is ideal for shaping cylindrical parts, as the rotation of the workpiece allows for precise cutting and shaping along the axis of rotation.

Conversely, in a CNC mill, the cutting tool is rotated, and the workpiece remains stationary or moves in multiple axes. This allows for a variety of shapes and features to be machined into the workpiece, making milling more versatile for producing flat, complex surfaces and intricate geometries.

Understanding this operational distinction is crucial for effectively choosing the right machine for a specific machining task. Thus, the correct answer clearly highlights how the CNC lathe rotates the workpiece while the CNC mill rotates the cutting tool, defining their fundamental operational characteristics.