CNC Turning Operations – Types of CNC Turning

Tapered turning: produce a cylindrical part of which diameter decrease from one end to another.

Hard turning: suited for materials with a Rockwell C hardness greater than 45, typically performed after heat treated.

Spherical generation: create a spherical finished surface, turning around fixed rotary axis.

Facing: a turning operation in which the workpiece is machined to its center.

Parting: create deep grooves that remove a completed or part-complete component from its parent stock.

Grooving: similar to parting, but only cut to a specific depth from outside or inside of workpiece.

Drilling: remove materials to drill holes from the inside of a workpiece with drill bits held stationary in the tail stock or tool turret of the lathe. Boring: enlarge or smooth an existing hole.

Knurling: cut serrated pattern onto the surface of workpiece with knurling tool, to change or enhance visual effect or hand grip.

Reaming: remove a small volume of materials from a drilled hole, for highly accurate diameters.

Threading: turn standard and non-standard screw threads, generally means single-point threading.

Polygonal turning: non-circular forms machining operation without interrupting the rotation of the raw material.