Just a minor point. Journal bearings and bushed bearings are not the same thing. Bushed bearings are made of a medium hard metal, but softer than the shaft. They are lubricated with free flowing oil, or grease. Journals are made with a very soft metal of usually an alloy of tin, lead, copper, and antimony. This alloy is called babbit. Journals are lubricated with pressurized oil and, execpt for startup, the hard metal shaft never touch's the soft metal journal.