Originally Posted by boatbod
A coupling should always have it's face turned and the bore mated to the shaft. How else can you be sure it is running true?
The face is connected to a Drive Saver, which by its nature is a bit flexible. It is also a split coupling, so when the shaft is mated to the coupling, they will have to dissassemble the mated pair to install, then get the tension on each side exactly the same as when mated in the shop. Just seems like alot of variability to me, and precision that takes place in a shop, but may not translate to the actual install.
I have people telling me 'this is the best way and we need to remove the shafts' and others telling me that 30 mm is 30 mm, it's a split coupling anyways, and connected to a Drive Saver, so don't worry about mating them up.