I suspect "pin" here would be best translated by "axe" (if there is any pivoting action going on) If there is no pivoting, but these are simply locating pins / pegs, perhaps "goupilles" would be more suitable.

"bearing" is rather odd — I can't quite see how it would be any kind of "palier" or "roulement", so perhaps it is "bearing" in the sense of a bearing surface that supports or holds up something.

It's a little hard to be sure without more context, but perhaps that will give you something to start you off.