Howdy! I know there are no silly questions, but this may be approaching the silly threshold. I'm putting an old 6x48 belt sander back into commission and am about to put the oil cups on. The belt drum axles run in bronze bearings and the trunnions? have a substantial void between the cast iron and the bronze bearing.
On electric motors I've taken apart there is some kind of non-woven "munge" that absorbs great amounts of oil and acts as a wick to slowly release the oil to the bearings.
So the question is: "Do I fill these voids with something like cotton or shredded felt to act as an oil buffer?" My concern is that the cast iron trunnions will "sweat" oil if there is no buffer.