You know, how they put the cheap metal axles in little plastic casters that go under Chinesium cabinets and such.

The rivets in cheap tools that let things move and spin.

If you have ever seen an Emergency Brake assembly with a foot pedal on it from a car from the 60’s to the early 2000’s, the part that you push down on swivels on a big rivet.

I always wondered how they made those and now I know. I ran across it earlier today and the process is called Orbital Riveting.

Orbital riveting is a low-force, noiseless cold-forming process that joins components by using a peen tool held at a fixed angle (typically 3° to 6°) to gradually deform a rivet. 
 Unlike impact riveting, the tool rotates off-center, maintaining a sweeping line of contact that progressively kneads the material into a desired shape with significantly reduced axial force. 

Of course there is a special machine with special bits that go in it they call Peens.

They can have different contours on the ends for specific types of finishes.

They can also control how far the end of the rivet expands and sticks out too.

That’s how they can allow parts to move and not fall off.

Here is the difference between Press Riveting and Orbital Riveting.

Just thought I would share, I’ve been turning wrenches for 45 years now and had never heard of it.