Buffing tools, equimpent and technique

[fender3x]

Gearcalc is the one that I use

https://locost7.info/gearcalc.php

Trust the auto racer to have the more sophisticated tool!

The one advantage I see with the online calculator that I used is that you can change the metrics easily. Menzerna publishes how fast the speed at the surface of the wheel (tangential speed) should be for their products in meters per second. I am in the US so the measurement I had for the diameter of the wheel was in inches. I could put in my measurements just as I had them, without the need to convert. (It does fully metric too, of course).

I like that yours could do all the speeds on a drill press at once, although you'd need to know the gear ratios. In my case all I have are the RPMs

[fender3x]

BTW, there is a lot of YouTube devoted to DIY buffing, most of which are which are pulley driven. I haven't seen any that give the tangential speed of the buffing wheel. Some give RPM, like the Stew Mac machine which is semi-DIY.

If you're making a buffing machine, you probably should figure out the tangential speed so that you at least don't exceed the speed of Menzerna...or the Stew Mac which is probably as close to a standard of the industry as there is.

Menzerna: 6-24 m/s
Stew Mac: 14 m/s

The most expensive component is likely to be the motor. There is an inverse correlation between cost of the motor and the turning speed. Cheap motors mostly turn faster, The speed is determined by the number of poles and the cycles in Hz of the mains. (50hz in Europe, 60hz in the US...in AUS, I am not sure...)



I haven's found a single calculator that will figure out the tangential velocity of a belt driven wheel, but if you know the RPM from the motor, you should be able to figure the RPM of the pulleys using this:

https://www.omnicalculator.com/physics/pulley

...and then the tangential velocity of the wheel using the driven pulley RPMs and this:

https://www.omnicalculator.com/everyday-life/rpm

FWIW ;-)