There are three processing methods for helical milling:

Arc processing method: With this method, the cutting tool is balanced, the roughness of the thread is better, and there will be no tool vibration phenomenon. 

It is the same when processing hard materials. It is a method very suitable for processing precision threads. (1. The tool is positioned quickly. 

2. The tool cuts in along the arc of the product, and interpolates along the Z axis at the same time. 3. The product is cut and interpolated for a full circle, and moves 

a lead in the axial direction. 4. The tool is fed along the arc Cut off and interpolate along the Z axis at the same time until the required size is processed.)

Radial processing method: This method is the easiest to process threads, but sometimes there are two situations. Small vertical marks will be left at the entry and exit points, 

but it will not affect the thread quality. When processing hard materials, when cutting When approaching the full profile, due to the large contact area between the tool and 

the tool, vibration may occur, and it is recommended to reduce the feed rate appropriately.

Radial processing method: This method is the easiest to process threads, but sometimes there are two situations. Small vertical marks will be left at the entry and exit points, 

but it will not affect the thread quality. When processing hard materials, when cutting When approaching the full profile, due to the large contact area between the tool and 

the tool, vibration may occur, and it is recommended to reduce the feed rate appropriately.

The tangential processing method is very simple to operate and has the advantages of the arc processing method, but this method is only suitable for the processing of 

external threads. (1. Cut in tangentially quickly, then interpolate for a full circle cutting, and move axially for one lead and exit quickly).