Quote:
Originally Posted by zstroken
Understood thanks.
From your explanation it isn't so much the weight, as it is the ability of a larger diameter shaft to deal with the increased centripetal forces that are because the shaft has some runout, bend, etc.
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I think to say weight is the main issue is misleading, as a 2" .065 wall shaft is not capable of as many RPMs as a 4" diameter .065 wall shaft at the same length and obviously the 4" shaft would weigh more.