@JZiggy the spring that keeps the tension on the 2" x 42" belt . If you pull the lever one way it takes the tension off the belt and you can then swap out the belt. If it's left in the normal position it keeps the vertical 2" belt tight.
On my original photo from the Craftsman belt sander showed a Nachi 6202ZE yet these original bearings were metal shielded on both sides! That's why I think that the nomenclature seems to me to have changed. JZiggy you could be 100% right that a 6202 -2RS (or -2R) might work fine. I just...
I don't know if the naming convention has changed in the last thirty or so years but I recently bought a 351.22638 Sears Craftsman 42" x 2" 1 hp belt sander. One of the bearings was suspect, so just ordered a set of 4 Nachi 6202ZZE bearings as the "ZZ" means metal protection on both sides of the...