How do i export to .STL?

For example, I have a 3D impeller drawing. I want to remove the blades(together) and save it as a single .stl file, and I want the hub separate from the blades in another .stl file. How do I further divide the blade into LE(Leading edge) TE(trailing edge) SS(suctions side) and PS(pressure side)?

4 Answers

First make two copy of part, then delete hub, save as stl and next delete blade then save as stl.

This might be an answer you are looking for - It helps to let others know what software you are using so that we can address your question.
https://catiav5v6tutorials.com/how-to/saveexport-assembly-in-igs-step-stl-format-in-catia-v5/