I have in mind an experiment which would require me an extremely high angular velocity centrifuge. In fact I do not need an actual centrifuge, all I need is a motor which would have extremely high angular velocity of its central core. I am talking here 40,000 rpm and higher. How fast do engines make the wheels rotate? not fast enough...

The top speed of a Dremel rotary tool, used by hobbyists and DIY, is around 37,000 rpm. I can't find any industrial tools that go any faster, but then I probably don't know where to look. Die grinders turn at 20,000 rpm.

The wheels on an Indianapolis race car are only turning at around 200-300 rpm. The engine crank itself is turning much faster. Some racing engines exceed 10,000 rpm, although I think those are smaller engines in motorcycles, not cars.

I think you'd have to look at a turbine to find speeds like that. Some of them turn at 40,000 rpm.

well, you could be a typical American and go and get a big V8 engine. Make a gearbox with a super big overdrive. If the engine can't go fast enough for whatever you're doing, replace the cam, cam springs, and rocker arms with stronger ones. say the engine can redline at, per se, 7k rounds per minute (I wouldn't keep it at that level for too long, though. You'll break something pretty quickly, especially if it's powerful) At 7k rounds, make a gear box with a gear ratio of about 6:1, so the output speed is 6 times faster than the input, that'll make whatever your thing is rotate at some 42k rounds. Make sure you get some diesel gears, nothing but the strongest would be able to take that. good luck with whatever you're trying to do. And, a side note, because of the big overdrive, if you're accelerating anything pretty heavy, it'll take a long time to accelerate to 42k rounds, because of the big overdrive.

You can easily get a 10K RPM 1 HP Electric motor cheap. Higher HP motors would run about 3600 rpm so you may have to use gears to increase speed. Or you may want to buy the spare centrifuges from the Syrians since they would not be using any time soon....:D

I now realize that a centrifuge will not solve that which I want to accomplish...I must rotate this some other way by pressure differentiation perhaps.

I want to say that I found a way to accelerate fluids to supersonic speeds...without use of centrifuge...through use of a vortex Hilsch tube

http://www.airtxinternational.com/images/vortextubediagram.jpg