Thread: Conundrum Curiosity Complex.

Wanna look at bearing?
McMaster-Carr

McMaster is fast and has an asinine amount of stuff, however they can be on the pricier side of things.

Mounted Bearings & Pillow Blocks - MSCDirect.com
MSC is similar, might have better pricing.

https://www.thebigbearingstore.com/p...lock-bearings/
Never heard of these people, but could be good.

A lot of the bearings that you are looking for are going to be made in china. The tolerances and materials required are not that demanding.

As far as the RPM thing goes, I would assume a standard speedometer for a bicycle would work? I don't think they run very high when having limited bells and whistles. Might have to convert MPH to RPM's though.... However, you'll have to run calcs to get the true RPMs of the blade versus the powering bicycle wheel. At the end it would just be a number to multiply the RPM value of the powering wheel.