What happened to the charkhadi (torture wheel) used by mughals against sikhs ?

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In the entire sikh history , this seems to be the only engineered torture device mughals must have used in sikh history . Ratan Singh bhangoo writes Bhai Subeg singh and his son were tortured on it and later locked up in jail when they still refused to convert to islam.

However if it has such huge blades on it , then there's no way someone could survive so much of blood loss .Perhaps there were no spikes and it was only used to break bones all over the body . Perhaps the mughals had 2 such variants (with and without spike ) of devices or more in their courtyard , mostly as an object of terror to make people down to their tyranny. 

However I am wondering where did this torture device went ? Maybe singhs found it and destroyed it ?

I have a few itching questions in my head on this one , if someone can please help 

1) Where did the device went ? (Apparently it was a huge torture device. How come no one preserved it as a legacy future generations could see in museum).

2) Where was the palace courtyard in which these devices were present ? (Shouldn't the ground have some holes or residues of the huge logs on which these wheels were mounted?)

3) Who destroyed these wheels ? or are they still present ?