How to find the maximum rpm of the solid shaft that has a ring mounted on it?

AI Thread Summary
To determine the maximum RPM at which a ring mounted on a solid shaft with a 0.002" interference fit will remain secure, it is essential to consider factors such as thermal expansion and material properties. Running the shaft at 7000 RPM and 400 degrees Celsius raises concerns about the adequacy of the interference fit, especially if the shaft and ring are made from different materials. Differential thermal expansion could cause the ring to loosen, impacting its stability at high speeds. Calculating the thermal expansion and the forces acting on the ring at elevated temperatures will help assess whether the fit is sufficient. Understanding these dynamics is crucial for ensuring the ring remains securely attached during operation.
a.googoodolls
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Hello,

I have to find the maximum rpm of the shaft that has ring mounted on the shaft with interference fit of 0.002". I want to know at what rpm the ring will come loose from the shaft?

and

If I run the shaft at 7000rpm at 400 degree Celsius, is the interference fit of 002" enough for the ring to hold on to the shaft? How can I find out if it is adequate or not?

Any suggestions will be appreciated.
 
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Angular velocity will have no bearing on whether the collar will stay on the shaft. Differential thermal expansion could play a part though, if the two parts are made of different materials.
 

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