Hi, in flange type rotary joints the torque is transferred through the
matting surfaces through friction.  The bolts are loaded in tension to
supply sufficient contact force and thereby the friction to carny the
torque.  If the bolts are loose and loaded in shear they will usual
fail.
If they are sufficient to carry the load in shear on paper they
should be
able to provide enough clamping force if tightened enough.  Sufficient
contact area is also needed.  If you are familiar with the
aircooled VW
flywheel mounting you will see the problems with pin type shear
couplings
on engines....

Murry I Rozansky


Far too many years ago when I worked with paper-mill technology, the
Defibrators (the machines the ground up wood chips into cotton-like
wool) had a a huge motor (~ 600 to 800 HP if I remember correctly)
driving about a 5" diam shaft turning a 3' diameter grinding disk. The
entire shear-load was handled in a tapered-friction-fit hub that was
maybe a bit wider than yours (maybe 3 or 4 inches wide). But there were
no pins, no splines, no keyways, no RTV or Loctite used.  Nothing but
skin-friction transferred all that torque, and I never knew one of them
to slip.  Admittedly, there was a huge nut that was well-tightened on
the end of the shaft that held everything together.

R

BTW Robin do a longer signature file than just "R" :)
We have lots of R's on here and you are not allowed to copyright the
capital letter "R" :)

Paul Lamar


I notice "Lamar" is copyrighted on many bill boards, I guess names are
allowable;)

I cut the female splined extension off of the planet set. Now wish I
would have left it in place for the reason Robin mentioned above. We
could have put a pipe thread on it or something to thread into the end
of the shaft.

Ed Carver


Correct :)

"Tapered" is the key word Ed. I don't think a steel taper will work
in an aluminum shaft.

Paul Lamar


Threads would go a long way with some epoxy or loctite.

Ed Carver