Thread Cutting Procedure of Lathe Machine: Now discussing about the thread cutting on a lathe machine. To cut thread first thing is to calculate the pitch, lead, major diameter, minor diameter and depth.

Thread Calculations. To cut a correct thread on the lathe, it is necessary first to make calculations so that the thread will have proper dimensions. The following diagrams and formulas will be helpful when calculating thread dimensions. Example: Calculate the pitch, depth, minor diameter, and width of flat for a ¾-10 NC thread.

Find threading formulas and definitions to calculate cutting speed, feed rate or any other lathe machining parameters for your thread turning, thread milling or tapping operations.

The formula of required time for tapping gives the required time for pusshing the tap inside and the formula of required time for cutting gives the required time for returning the tap. The process of threading is used to produce helix by removing material from circular surfaces.

When machining threads on a lathe with a single-point cutting tool, the cutting depth (also called depth of cut) is the distance that the cutting tool penetrates into the material during each pass. It is important to control the cutting depth to ensure proper thread geometry and avoid excessive tool wear or damage.