If your TOB is in PERFECT alignment with the clutch fingers, then you will be fine. Since a Cub TOB swings in an arc, and not centered on the clutch fingers sliding straight in and out like a truck or car, it's almost impossible to get one in PERFECT alignment. When the clutch fingers aren't perfectly centered on the TOB face (think two washers stacked on top of each other then bump the top one a little to the side so it's not even with the bottom one), the clutch fingers will scuff back and forth (closer to the center on one side, farther away 180 degrees around, and then back to closer to center at beginning). This metal on metal scuffing up to 1800 RPM tends to build up some heat that will boil the grease out of the TOB and/or torch away the finger ends. The graphite, properly oiled and kept oiled with cheap grease so the oil leaches out into the graphite, allows the fingers to slide in their own circle on the face of the graphite. The graphite doesn't turn it just lets the fingers slide.
The secrets to longevity of the graphite is properly adjusted clutch fingers, properly oiled graphite, and not spending any longer than absolutely necessary with the clutch depressed. Don't hold the clutch down while you talk to the neighbor, put it in neutral and get your foot off the clutch.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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