You can disconnect joints in a skeleton to separate joint chains. The joint that is disconnected becomes the root joint of
            a new skeleton.
         
         Note 
                  - If you disconnect a joint in a joint chain that has an IK handle, the IK handle will be deleted.
- You can not disconnect a root joint.
- You can disconnect the joints of a character with a bound skin without having to detach its skin.
 
         To disconnect joints
         
         
            - Select the joint you want to disconnect.
- Open the  menu set (press F2).
            
- Do one of the following:
               A marking menu appears.
                The bone between the current joint and its parent joint is removed.
                
The joint disconnects from its skeleton and becomes the root of a new skeleton.