Anthony wrote:

Oops...failed to notice you said *larger* at the headstock. That would
not be material flex.

Wrong. Work flexes away from the tool resulting in smaller diameter as
you go away from the headstock.

BeamOut ''(30E6,I_tube 1 .5)Beam 0 (5 35)
pos'n pt. couples shear bend. slope def'l
force stress stress

0 -35 -175 -59.42 1783 0 0
5 35 0 0 0 0.0002971 0.0009903

It only takes 35 pounds force to deflect a cantilevered 1" steel bar a
thou at 5 inches from the support.

Ted