Planning to use a short piece (2 or 3 inches) of 5/8" outer diameter aluminum tubing. The wall thickness will be 1/16" to 1/8".
Pressing down on the center of the tube will be a maximum momentary pressure of very roughly 300 pounds (a wild guess).
Is there any difference between 6061 aluminum and aircraft grade aluminum for that purpose?
General ideas about the differences between the two would also be appreciated.
Thanks.
FWIW: With the aluminum tube end inner surface roughened, if I can get the inner diameter correct so that the aluminum tube end can be glued snugly around the motor gear, that should be straight and hold very well. The aluminum tube might also provide good heat sinking when spinning fast.