プラネットカッタの下穴余裕は、最低でどの位確保すればよいでしょうか？ | オーエスジー

What is the minimum amount of room for threadmill pilot holes?  

The threadmill pilothole margin is usually at least 1.5P, but if you devise a program yourself, you can do it with 1P.

(However, this excludes the AT-2 and single point.) ）