How to add tolerance to a thread?

w_s856

Context: https://cad.onshape.com/documents/7b6a91ec522a4dfa3bcd92af/w/16db1dd0c573e4f7ced45e8a/e/89ad5276f1ecdb27e889886e?renderMode=0&uiState=667451b68ff3476a026ec8e7

lid - back is expected to be screwed into body. I created the connection by

• creating an in-thread to main
• substracting main from lid - back

This is great - I now have thread matching exactly.

This "exactly" is my problem: I will need some tolerance for imperfections when I print the parts, so I would like to add a tiny gap between the threads. Is there a way to do that?


Note: day 1685 of hoping to be "approved" so my content is not moderated before publication

rick_randall

w_s856

Have you tried the "move face " command?  Worked for me.

robert_scott_jr_

I was going to suggest the offset option within the boolean dialog but I see you did make use of it. Didn't that work? - Scotty

w_s856

robert_scott_jr_ said:

I was going to suggest the offset option within the boolean dialog but I see you did make use of it. Didn't that work? - Scotty

I do not know yet - the week was crazy and I planned to have a close look this week-end (both on the drawing where I have to find this gap, and then after printing out the object). Thank you very much for your answer, I just did not have the time to get around that yet.

rogier_van_vugt

Either
- don't do the substraction but make a 2nd thread with a slightly different diameter (e.g. 10mm for inner, 10.3mm for outer thread)
- or do the subtraction, but with a slightly enlarged part (3% extra or so)