See also: Thread Mill Cycle
The Thread Mill command allows you to create a thread up or down the vertical axis of the machine. The cycle supports straight, taper, multi-start and arc lead-in/lead-out options. You can also machine multiple threads within the same command.
Note that the thread units can differ from the units used for the rest of the part. If you get an unexpected result from this cycle, check the values you used for the cycle parameters.
You start defining the thread by selecting an arc entity. This arc represents the major diameter of an external thread, or the minor diameter of an internal thread. Note that before using this cycle you must have an arc that you can select for the cycle.
On the Depth tab, the parameters Upper Distance and Lower Distance define the start and end heights of the thread. All measurements are taken from the bottom of the thread, so if you define an overlapping tool, the system mills a thread above this height.