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Friday, January 5, 2024

Concentricity

No they did not open for Phil Collins at Madison Square Gardens in 1980.

This incredibly stiff piece of 12mm carbon fiber composite is sold as rod not as a shaft.  How concentric is it. I put it in the lathe with the steady rest and measured variation in height as I rotated it.  The very end moved .046".  This does not seem very far off.  I could turn that much off reducing a 12mm rod to about 10.9mm.  Perhaps starting with a 13mm rod and turning it down by the same amount.

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