ソリッドタイプのスレッドミルでメートルねじのおねじ加工が選べない【threadpro（スレッドプロ）】 | オーエスジー

I can't choose the thread processing of metric threads with a solid type thread mill [ThreadPro]

Thread mills for solid type metric threads such as AT-1 are specialized tools for internal threads, so external threads cannot be processed.

This is because there is a difference in the height of the summit cut out of the male thread and the female thread, and the shape of the metric screw and the unified screw are different. In addition, the JIS standard requires the valley bottom of the external thread to be R shape. The top of the thread thread of the thread mill is R-shaped.

	Thread mill for external threads	Thread mill for internal threads
Tool chevron H: Height of Mt. Spiny
Tool display	EXT	INT
Screw Peaks	R	FLAT
Screw valley floor	FLAT	FLAT

For metric screws, there is an insert for thread processing with an insert interchangeable type, so by selecting it, it can be processed into a chevron shape according to the standard, so a program can be issued.