After thinking about this topic, a bit more I decided to look at it as an engineer would, probably should have started with this. The cured compressive shear strength of Loctite 609 after 24hrs is 2290psi. The crank shaft to crank web joint is in shear because the shaft wants to rotate in the web.

The shaft is .250dia and the web is .125in thick so the total area of the joint is:

3.14*D= circumference 3.14*.250in= .785in

circumference*depth=area .785in*.125in=.0981in^2

The total strain the joint can resist is the area * the compression shear strength of the bonding material:

.0981in*2290psi=224.649In/lbs

Or:

(224.649In/lbs)/12=18.720ft/lbs

Really quite a lot when you think about the size of the parts and the application. Tin based soft solder has about the same shear strength. Of course, this is the ideal condition, assuming a good fit and clean parts. Loctite 680 has an even higher shear strength at 3500psi after 24hrs. Loctite 638 has a final cure shear strength of 4200psi on steel after 7days. Despite what the engineering says I still put my trust in experience, again, thank you for your help.

Amazingly strong sticky stuff.