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

Thread mills for solid type metric threads such as AT-1 are internal thread special tools and cannot be machined external thread .

This is because there is a difference in the height of the external thread and internal thread summit cutouts of metric screws and unified screws, and the shape is different. Also, according to the JIS standard, the valley floor of external thread is required to be R shape. The top of the thread thread of the thread mill is R-shaped.

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

There is an insert for external thread processing with an insert interchangeable type, so by selecting it, it can be processed into a chevron according to the standard, so a program can be issued.

(FAQID:194)