Put the metal end from the strike with the rear from the centre till it connections the actual external showing mug. Strike the strike with a hammer ball bearings sizes until the cup pushes from the centre. Turn the centre over and employ the same technique to remove the internal showing cup.

A radial ball bearing is capable of supporting reasonable kinds of radial and axial loads. These high precision bearings can easily operate at high speeds up to approximately 400,000 RPMs and even higher. Ball bearings are often assembled with different shields or seals that are for protection and are usually lubricated for their efficient and longer use.

Odds are, you probably don't think about ball bearings that much, any more than you devote stray moments contemplating how your iPhone manages to monitor changes in electrical current that occur when your fingertips brush across the screen. But me, I've always harbored a certain fascination with ball bearings, and not just because I was heavily influenced by Hanna-Barbera animated cartoons as a kid. I still have some vague recollection of Jerry the mouse dumping a sack of the little metal spheres in the path of Tom the cat to upend him.

Think of it this way: if ball bearings hadn't been invented — either by the Egyptians, the ancient inhabitants of England, or by alien UFO pilots who visited Earth during the Stone Age (okay, I'm just throwing that in to see if you're paying attention) — many of the other inventions that have followed in the last five millennia wouldn't work so well, if at all. That's because those other inventions — automobile engines, machines on factory assembly lines, helicopters, robots, in-line skates — usually involve controlled multi-directional movement of some sort. Ball bearings, which enable parts to rotate as well as roll and also help regulate their movement with just the right amount of friction, make that possible.