What is the fastest man-made rotation speed? And also the fastest angular speed?
This really depends on what you consider to be a man-made rotation. High-speed drills (like the ones dentists use) can get up to 500,000 rpm. That’s about the fastest mechanical object I can think of. But if you are willing to consider the motion of charged particles, we can surpass. For example, the motion of charged particles around the circular path of the Large Hadron Collider is about 660,000 rpm, but the radius of that motion is over 4 km (2.5 mi), which is much bigger than a hard drive. You can confine electrons in a special type of trap called a Penning trap, where the electrons will circle at about 60,000,000 rpm. In fact, the motion of the electrons undergoes a big rotation around the center of the trap and a small rotation about the location defined by the big point, and that secondary rotation can be faster than 60,000,000,000 rpm. So, if you consider charged particles that are being accelerated by a man-made device, then there are things a whole lot faster than hard drives
