Chapter 8:

CNC Turning

Upon successful completion of this lesson, you will be able to:



Milling machines work by moving a spinning tool over a stationary part. Lathes work by spinning the part and moving the tool, making them ideal for round parts like shafts, pins and pulleys.

Figure 8.1: Milling vs. Turning

There are many different configurations of CNC lathes. Some have two spindles, some two tool turrets, and some even integrate milling or grinding in the same machine. There is also variation between similar machines. Horsepower, the size of stock that can be gripped, and how tools are held vary greatly between lathes.

Discussing every lathe configuration is beyond the scope of this book. This chapter discusses one of the most common lathe configurations, called a Turning Center, with one spindle and tool turret.