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I might also recommend McMaster Carr:
McMaster-Carr
cheaper....McMaster-Carr
Since you are going to be low speed the pricing would be a lot better.
I might use cast pillow blocks for the arbor...

When I worked full time as a contract designer of fixturing, I used to go out and walk through Hardware stores and Surplus stores looking for ideas which became soutions.
~Richard

When I were tiny, the story goes, my Dad, between jobs, collected floor sweepings and sold the resulting bags of hardware to keep my Mom and I in food.:chapeau
~Richard

Nothing new under the sun...or.... am I wrong?
229601

~Richard