But still, 1 serious bearing and housing..
http://www.timken.com/en-us/products/bearings/productlist/HousedUnits/Pages/TimkenSphericalPillowBlocks.aspx#

Would need to have a round axle shaft?  and some welding to build a good frame to hold this pillow block, but if it's used in mines, etc..  should stand up to about any disk.

I do like that "split housing" that is bolted together, would be really nice if the bearing actually ever did fail....

Edit,, Looked in the online catalog, go to page "B388"  How big is your axle shaft ?

Series "SAF225"  might be what you're looking for ??

Looks like you could drag the disk to death before wearing out the bearings ??