
How to Machine Left-Hand Threads on a CNC Lathe?
When machining external left-hand threads on a CNC lathe, the most important thing is not that the process itself is overly complex, but rather to grasp some key practical skills. For example: when programming, remember to set the feed in the negative direction (when the Z-axis is positive, reverse the tool travel); set the starting point and pitch parameters correctly; choose a tool geometry suitable for left-hand cutting; and avoid irregular threading caused by unstable spindle speed during reversing.