Can I desgn a rotating disc without using a centre shaft

AI Thread Summary
It is feasible to design a rotating disc with a central hole without using a center shaft by employing a rim that connects to the disc's interior or exterior, allowing it to slide through a supporting structure. For horizontal spinning, three or more rollers can support the disc's rim, with some rollers driven to create rotation. A design proposal includes multiple layers spinning in opposite directions, raising questions about the placement of the driver for optimal functionality. The use of a large planetary gear is also suggested, prompting inquiries about suspending the gears in mid-air for rotation. Overall, innovative mechanisms can support and drive a disc without a central shaft.
jeredane
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Is it possbile to spin a disc that has a hole in the centre like normal DVDs but without using a rotating centre shaft that is passing through the hole?

The spining disc has to be supported too by a structure. Is there any mechanism to recommend?
 
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Yes, it is possible. There are a number of ways to do this, but it all comes down to a rim attached to either the inside of the hole or the outside of the wheel. This rim slides through the supporting structure.

Some practical examples, demonstrated on bicycle wheels:
http://www.designboom.com/weblog/cat/8/view/11207/hubless-spokeless-bicycle-wheel-compilation.html
 
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Hey.. THanks for the reply!

How about if the disc is being spin horizontally? is there anyway of supporting the disc without the centre shaft?
 
Three or more rollers around the rim with one or more driven to provide spin.
 
The following picture is a ride that i have design. the outer and the inner layers spin in the same direction and the middle layer spin in the opposite direction. how can i spin the outer layer of the ride and the middle layer of the ride? where can i place the driver?

If i were to use a planetary gear that is very big is it possible? Is there anyway to supend the gears in mid air and let it rotate?
 

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