High-speed rotation testing apparatus

A high-speed rotation testing apparatus for rotating a test object to test at least one of strength and durability of the test object while rotating, the apparatus comprising:

• a first spindle;
• a second spindle coupled to a lower end of said first spindle and comprising a lower end that holds the test object, center lines of the first spindle and the second spindle being aligned;
• a driving motor that applies torque to said first spindle, the driving motor comprising a rotor shaft coupled to an upper end of said first spindle, the rotor shaft defining a through-hole configured to receive a portion of said first spindle, said first spindle rotating integrally with said rotor shaft in said through-hole;
• a weight supporting shaft, defining a through-hole configured to receive a portion of said second spindle, said second spindle rotating integrally with said first spindle within said through-hole;
• a frame that supports said rotor shaft and said weight supporting shaft in a substantially vertical configuration;
• and
• a damping mechanism, configured to suppress an oscillation of said second spindle within said through-hole during rotation.