Why is the slot on the body of a fly-cutter offset from the centre?
Is it so that the cutting edge itself is brought onto the line of a diameter?
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On the Chronos fly cutter that I have, the cutting bit is about 6" long and 1/4" square.
How much should protrude at the sharp end? It seems to me that if there was more than, say, 1", that there would be destructive forces tending to bend or to shatter the cutting bit.
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When using fly cutters and planing bits in hand shapers, surely as the cut proceeds, the cutting bit will wear and that therefore you will not end up with a uniformly flat surface?