チップ交換式のスレッドミルを使用してpt1インチの加工をしたが、上下１回目と２回目の間のねじに段差が付く。なぜ？ | オーエスジー

chip I used an interchangeable thread mill to process a PT of 1 inch, but there was a step between the first and second threads on the top and bottom. Why?

Please make sure that the chip is not upside down.

For tapered screws for pipes, there is a tapered on the chip side.

Therefore, if you install the chip on the wrong side, it will be reversed and a step will occur.

When attaching the right-handed chip to the right-handed holder (LH is not in the model number), it is necessary to install it so that the letter "R" is visible.

If you can read "L" on the attached chip , it is reversed.

* If the model number of the holder contains "LH", the correct method is to install it so that the letter "L" can be seen when the chip is attached.

References: chip Mounting Orientation of Thread Mill Inserts for Interchangeable Pipe Tapered Threads