So what are oilite bearings made from, whatever it is its fine for some time
then starts to chatter.
Brian

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On 17/01/2020 02:47, Bill Wright wrote:
I was trying to think of all the sacrificial things. Sacrificial anodes
on ships, yes. But... how about the face of a wooden mallet? Because the
reason it's wood is because steel would be too hard. Because the wood is
softer it's more likely to get damaged. Stretching a point? A wooden
gramophone needle, which wears out quickly but doesn't damage the
shellac? Can anyone think of sacrificial things?

Bill

Not quite sacrificial but white metal bearing linings are used for two
reasons, firstly they melt without damaging the shaft if they lose the oil
supply, secondly large abrasive particulate in the oil embeds deeply
enough *not* to make it become a lap.

Tip: this does not apply to bronze bushes running (lubricated) on hardened
steel shafts. A colleague once thought it might be a good idea to polish
some car internals with (snaffled) diamond paste. Evidently he did not
clean it sufficiently well, because there was enough in the system to turn
the bronze camshaft bushes into laps, which wore out the camshaft bearing
sites in a few thousand miles.