appreciated sandy - however, i'm not interested in using any aluminum in my design.
Printable View
Any epoxy will easily hold that. You can eliminate the grooves, and just roughen up the shaft with sandpaper.
That's how golf clubs are made, and they never come apart, in a much more severe environment.
You just want an easy slip fit, with just enough room for a thin layer of epoxy around the shaft.
And you can probably reduce the length of the shaft by at least 1/3.