Thread milling is a niche mill that cuts internal or external threads in a workpiece. Threads are Slash by the rotation of only one position, dual position, or triple stage cutting Device. Milling machines come across uses in almost every manufacturing sector. Some popular industries that use these machines are: https://milling-machines-bridgepo56677.blogoscience.com/32902470/the-2-minute-rule-for-used-cnc-milling-machines