The difference between the threading tool and the external turning tool
When the rib is in the rib, it is a fan. The sharp corners of the knife should be the same as the thread's rib Angle, usually 60 degrees. The external turning tool is not required.
Thread knives are specially designed for threading. The outside round knife is widely used. 90 °, 45 °, such as the knife can be outside circle. And thread cutter, gb is 60 °
From left: 90 ° cylindrical turning tool, inner hole threading tool, inner hole tool, blind hole cutting tool, cutting knife, threading tool, machine tool, 45 ° turning tool
