Andy Dingley wrote:

On Thu, 07 Apr 2005 11:14:45 -0700, Jack R
wrote:



I need to spin a 24 inch round table at about 150 RPM several hours a day.





Any thoughts.



150rpm is quite fast for 24inch diameter. It's fast enough to need
things fastening down to it.

For a hub, go to a scrapyard and get a car front hub. Something with
a Macpherson strut often allows easy unbolting and re-mounting. A
brake disk can make a base for the table.

Rubber toothed belt drives will easily drive by friction alone onto a
turned cast iron cylinder and a toothed pinion on the small diameter
motor shaft.



Current Dodge truck front hubless designs come to mind. Maybe the 1 ton
model, 2000, 2001 year. Bottom flange ( inboard on the truck ) will
have 4 threaded holes so you can bolt it to something. The top flange (
outboard on the truck, where the rotor and wheel attach ) will have
eight studs. Maybe 5-6" total height. Nice big ol' tapered bearings in
there, too. That'll handle a load!! And guess what? With rim / tire
assembly on the vehicle, it turns out to be almost a 24" diameter if not
more. Put a side force on it all you want, that's how they work in
their designed environment. Multi-directional load.