ｓ－ｘｐｆのオーバサイズを使う時の下穴径はどうする？ | オーエスジー

What should be the pilot hole diameter when using the S-XPF oversize?

When using the oversize of the non-grooved Tap series, including the S-XPF, it is recommended to add +0.013 mm for each rankover based on the value of the recommended pilothole diameter of the standard. This is only a guideline, so please adjust it while checking the actual finish.