Hello All,
I learned something today that I did not know about before. "The Rockwell Test." I went on YouTube and found a video Accessed April 26th from,
https://www.youtube.com/watch?v=G2JGNlIvNC4.
Then I realised that back in my High School Metalwork class we just referred to it as a type of "Hardness Test".
I did a quick search for what a "Johnson Spanners." might be.
All I could find was that it was the name of a tool manufacturer, or they were a tool used for working on Johnson outboard motors. Are Johnson Spanners a specialist type of spanner - if so what do they look like?
Kind Regards
Lionel