How do they manufacture these so accurately ?

Been having a discussion on the subject and none of use can agree on a manufacturing process

Any SNetters shed some light ?

 

I expect a combination of casting and milling.

 

I used them on my racing cars when I built them. They are as good as you can get for suspension linking. The outer banjo has the two bearing caps pressed in one from each side to hold the central ball in place. I used to go to the factory to get what I needed. They were extremely helpful to me

They never seemed to wear out if you kept them oiled regularly.

Les