My Bison 1" R8 slitting saw arbor arrived today, and as always with
Bison, it's a sight to behold. Each spacer is polished, along with the
1" shaft segment. Putting a saw on was a damn tight fit, it was either
in-line, or it wasn't going to fit...

The end nut is a higher class of fit than you normally get on a 1" bolt,
so much so that some small swarf in the threads barely larger than
pencil eraser residue kept the nut from hand-tightening. After I cleaned
the threads out, it threads on and off like satin...