In Chapter 35, various lathe cycles were the main subject, normally used for turning and boring. In this section, a similar look will focus on another multiple repetitive cycles, this time used for various threading applications.

In early stages of CNC development, simple G92 threading cycle was a direct result of computerized technology of its time. Computer technology has been rapidly advancing and many great new features have been offered to CNC programmers. These new features simplify program development. One of the major additions is another lathe cycle, used for threading - a multiple repetitive threading cycle G76. This cycle is considered a complex cycle - not because it is difficult to use (on the contrary) but because it has some very powerful internal features.

To fully appreciate the impact of G76 threading cycle, compare it with the original G32 threading method, and even G92 cycle just described. While a program using the G32 method requires four or even five blocks for each threading pass, and G92 cycle requires one block for each threading pass, G76 cycle will do any single thread in one or two blocks of program, depending on control model. With G76 cycle, any number of threading passes will still occupy only a very small portion of the program, making any editing (if necessary) very easy and fast.

There are two programming formats available, depending on the control model. This is similar to programming of the other lathe cycles.