Can we put right hand thread with left hand tool on CNC? If possible then what will be the position of the tool in turret and spindle rotation?

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Brian Ostosh

The cutting tip/point of the cutter does not matter left or right, the thread geometry is identical. Just tool holder access is necessary.

As a machinist over 50 years, i have never had to cut a left hand thread, Yet. Never had to solve this problem.

Petr M. Pivkin

Yes! 👍 If it is a profile cutting insert for threads without a cross-rake angle.

No. If there is a cross-rake angle on the tool holder, there will be a thread profile error.