Sylvain, You don't need to apologize for your English; I hadn't even noticed. I think I understand your problem now. You are trying to helically sweep the entire multi-tip threading insert. That will create an overlapping geometry problem for Pro because one tooth will follow right behind another. You need to sweep one tooth shape through the entire cut if possible. It can also simplify things if you create necessary fillets, etc. with additional features afterwards. (Of course, if you have a multi-start thread you will need more than one sweep, which you can do with a pattern, but that's not the situation here.) If you need to do something a little fancy, like showing the intersection of the tube seal geometry with the thread, you can create 2 separate pieces of Surface geometry, Merge the 2, then use the Merge to cut away material with Solidify. David