Hi, Sorry for the delay, I haven't seen your answer.

as there is bearings I still want to perfom this study with several solids.

I think I have found the solution to my problem, I will show you my procedure, if you think it is correct then I'll mark this topic "solved"

step 1

open the geometry in space claim and slice each solids so there is no more than one BC per face.

Step 2

in static tructural, connect the sliced body together using "contact -->bonded"

Step 3

Apply the BC conditions (supports and forces)

Step 4

perform the simulation 

Step 5

enjoy your results without anys warning messages.


I hope my explanations are clear and moreover I hope my solution is correct