For those who maybe interested in the 1x30 belt sander on Amazon mentioned by Dwight, I believe it is the same unit sold by Harbor Freight and probably Princess Auto. Here is a vid on setting up the sander to be smoother.
I have added the better bearing, and turned the wheels, two on my lathe and the drive wheel in place. Much smoother. I have also placed a magnet in a small plastic bag behind the drive wheel, catches metal filings, hold the bag over the trash, reach in, pull out the magnet, the filings on the outside drop off.