* These carbide inserts are designed for left hand external threading
* Here are some tips for machining threads:

* To cut external threads, file the edges of the round rod first and then chamfer it at an angle of 45 degrees
* Ensure that when compared to the depth of the thread, the chamfer is bigger
* Include a chamfer to external thread end parts;
Ensure the starting end of a thread has a flat surface
* Also, ensure that it is consistent with the central axis of the thread