What is precision CNC machining?

CNC machining, short for computer numerical control machining, is a prevalent manufacturing method employing automated, high-speed cutting tools to shape metal or plastic stock into desired designs. CNC machines contain 3-axis, 4-axis, and 5-axis milling machines, lathes, milling-turning, and routers. They each have unique approach to cutting parts. In CNC milling, the cutting tool is mounted on a rotating spindle which moves across the material to cut away excess, shap ing the workpiece into the desired form.Conversely, CNC turning involves the raw material or workpiece spinning on a spindle, while the cutting tool remains fixed in position.CNC milling and turning, also known as multi-axis machining or mill-turn machining, combines both milling and turning operations in a single machine.This process allows for the simultaneous use of multiple cutting tools to create complex parts with both rotational and prismatic features.

When to consider CNC turning instead

While CNC milling is suitable for a breadth of materials and can be very cost-effective, it is not necessarily appropriate for every manufacturing application. A number of other manufacturing processes are compatible with CNC technology.

CNC turning, is similar to CNC milling, but the processes differ in several key respects. While CNC milling uses a rotating tool, CNC turning uses a rotating part and a cutting tool which does not rotate. CNC turning creates parts with round cross sections, while milling is typically used with prismatic parts. Complex parts that have both prismatic features and features of circular cross section can be made using multiple setups on both milling and turning centers, or on Mill-Turn or MultiTasking machines that combine both milling and turning operations in a single piece of equipment.

Pure turning is more commonly used for simple, cylindrical parts like shafts, hollow tubes, or conical shapes. While these shapes could be made with a milling machine, it's typically faster, more efficient, and less costly to create these parts using turning.