Tim Wescott fired this volley in news:4o-
:

So, do you think #1 would work? Is there a name for #2, and could I
count on it, or should I just stick with #1?

Tim,
This sounds like it might be a bit out of your ken. First, a five or ten
degree mis-alignment between shafts almost demands a CV joint, and
they're not 100% efficient except when running perfectly axially.

If you can't joggle things to be within a degree or two, you're just not
going to get what you want, unless you belt drive the sucker. Put a
sheave on the driving element, and a sheave on the torque sensor, and do
it that way.

Otherwise, a simple, cheap coupling for minor misalignments is called a
"Lovejoy Coupling". It transmits torque effectively with only minor heat
losses and also cushions any shocks in the train.

Lloyd