Good vid, David. Thanks for posting that. His explanation for the galling on a ball-bearing race vs. cone and roller was a good one. Some of the outfits supplying "kits" for rebuilding systems would benefit from watching it! :smirk:
Grandfather, father, uncle, brother and self all worked at some point for a company that made seamless tubing for bearings. LTV, Timken and New Departure were among the customers for the product. Dad, his brother and I were in Quality Control. Unfortunately, the foreign manufacturers' government subsidies (and in no small part, domestic labor unions) killed off most domestic producers by the late '70's.
Learned the difference between "pipe" and "tubing" at an early age. Same with "motor" and "engine." As a pre-teen I got the benefit of observing and learning during the development of some of the first ultrasonic testing equipment for steel tubing. A physics PhD, a metallurgist and Dad (E.E.) were among my tutors. A real "leg up" to understanding things mechanical and electrical.