09-08-2020, 02:19 PM
"An English bishop, John Wilkins, (1614-1672) invented the system part of the decimal metric system when he published a book with a plan for a 'universal measure' in 1668" so we can't blame those filthy foreign devils for it...;-)
I had a traumatic tertiary education, 1st year all imperial, 2nd year half of the workshop machinery was converted over the summer holidays so it was half imperial - half metric and the 3rd year was all metric. I've never quite recovered so woodwoork is in inches, metalwork in mm and guessometry in whichever side of the tape I'm reading.
I'm glad I kept my old and "out of date" Zeus data charts though, the recent ones miss out all the interesting Whit, BA and BSF thread pitches.
I had a traumatic tertiary education, 1st year all imperial, 2nd year half of the workshop machinery was converted over the summer holidays so it was half imperial - half metric and the 3rd year was all metric. I've never quite recovered so woodwoork is in inches, metalwork in mm and guessometry in whichever side of the tape I'm reading.
I'm glad I kept my old and "out of date" Zeus data charts though, the recent ones miss out all the interesting Whit, BA and BSF thread pitches.