Snag wrote:

Just to be pedantic: ;-)

My cue was that the originals were steel alloy . H-D had a reason
for that ...

There was a reason. Maybe without reason.


BTW , crank bearings are usually at least 2" diameter , and run with an
oil film .

My example was only to show, that the bearing material itself doesn't
have to be thick-walled.

These are .674 and .699 diameter , and are greased . They also
only rotate about 10 degrees max , so the load is very concentrated .

The same is valid for bronce and steel bushings. :-)
Generaly, steel (gliding) on steel without _pressurized_ oiling is
deemed to fail. One exception coming to my mind is a CI-bushing.

Nick
--
Motor Modelle // Engine Models
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