Originally Posted by CoalCracker
Gotcha, How about making the shaft a hair longer and then adding a collar on the outside to essentially "lock" the bearing in place?
The problem isn't locking the shaft into the bearing. The bearing has either an eccentric cam (The oval you refer to) or a set screw. The problem is that the pillow block will allow the weight of the MLT to "sag" the bearing inside the pillow block. This will cause your hoop to twist vertically on the MLT and that's bad.
What I'm saying, is that the hoop will not have enough resistance to that "Twist" to hold the shaft perpendicular to the MLT, because the bearing will allow that degree of motion.
If the bearing is fixed with relation to the shaft (Still able to rotate on the tippy axis, but not on the sagging hoop axis) you won't have that problem because the bearing will take all of that load.
Here's a really crappy pic of a pillow block "Out of alignment" if you will...