Left-handed screw/thread

[Steto]

Dear PTC Community,

maybe this is trivial, anyway I ask: how to do left-handed threads in PTC Creo Parametric 9.0?

Thank you for your cooperation

Stefano Cristofanelli

[tbraxton]

When using a helical sweep feature there is an option for left/right hand rule.

[Steto]

Dear @tbraxton,

thank you for your quick support. However, I did not mean to makle a helical sweep for any thread (this would be graphically heavy and would not add any explicit information to the drawing), I just need to automatically define/label a thread as left-handed (so that the purchase dept. may provide the suitable screw/threaded bar).

Best regards

Stefano

[tbraxton]

It is typically dealt with in the hole callout/note with the suffix "LH". This is a US standard example; it may be different for ISO/EU standards.

[Steto]

Dear @tbraxton,

thank you for your reply.

Best regards

[BenLoosli · Accepted solution]

Symbolic representation of RH and LH threads would be the same. In your thread callout, just add LH after the thread type.

If you wanted to automate it a little, create a new hole file for the left-hand threads and modify the automated calout information to indicate LH.

[Steto]

Dear @BenLoosli,

thank you for this hint, for me it is solved.

Best regards