So I've outgrown my Jet combo belt/disc belt sander combo primarily designed for wood working...now its covered in metal dust and the backing plate is badly worn 
Found this last night while surfing. Looks like a very worthwhile investment or project for any metal worker. Check it out along with the two videos!
KMG Industrial Belt Grinders, Beaumont Metal Works
Then while surfing a little more I found this. Very simple to build one ourselves!
No Weld Grinder Knife Grinder Walk Through Plans Built Tool - Zoki Videos
Since I have a welder I'll avoid the mechanical connections. I just put this project at the top of my "list"!

Found this last night while surfing. Looks like a very worthwhile investment or project for any metal worker. Check it out along with the two videos!
KMG Industrial Belt Grinders, Beaumont Metal Works
Then while surfing a little more I found this. Very simple to build one ourselves!
No Weld Grinder Knife Grinder Walk Through Plans Built Tool - Zoki Videos
Since I have a welder I'll avoid the mechanical connections. I just put this project at the top of my "list"!