Those rings main purpose as I was told by the Blacksmith I apprenticed under was to make kids like me ask questions. But though many of the shafts in his old shop was no longer used there was a belt hanging on 1 of the shafts it had 1 of the rings under it on the shaft so I suspected that more than to keep the shaft clean they were there to park a belt on when not in use but I also noticed wide hooks hanging near some of the other pulley locations just above the shafts that had belts hanging on them keeping the belts from touching the rotating shaft. Which led me to think that possibly a ring could have been used to move a belt to another machine The old man was funny that way somethings he would spend h ours lecturing on the care and proper use of this or that while other things he would simply roll off any remark that came into his head.
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