Thanks. When I loosened the guide bolts, and turned the shaft, the bearing didn't seem to move. I'll dig deeper. I was thinking of drilling out the bearing shaft hole, to allow adjustment. .020 blades are hard to find. I would like to use the .025 blade I now have.One guide bearing on each side is adjustable per the manual that can be found here.
http://vintagemachinery.org/pubs/222/5221.pdf
It says the roller with out the flange is adjustable. You may have to take it off and clean it up.
I drilled the holes out for the guide axels and all is good. Went from .43 to .50" Now I can use the .025 blades.I took the bearing shafts out, and the one hole is oversized to allow some adjustment.
I adjusted them as wide as possible, and it still bends the blade.
I don't see anything to do, but, drill the hole s bit more oversized. Sounds drastic, when, somewhere, I read someone said they used .025 blades on their 108.22921.
Wishwas me!