What was the traditional way of making granite surface plates back during WWII? Was it a hand operation like scraping metal plates using three separate pieces to reference against each other?
What was the traditional way of making granite surface plates back during WWII? Was it a hand operation like scraping metal plates using three separate pieces to reference against each other?
yup
How would you scrape granite?
Old thread... but...
Surface plates were/are/can be touched down with an overhead grinding wheel.
Guy Lautard covers the making of surface plates in The Machinist's Second Bedside Reader.