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applebuilder
09-06-2009, 06:07 PM
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?

the4thseal
09-06-2009, 09:50 PM
yup

applebuilder
09-06-2009, 10:46 PM
How would you scrape granite?

keith20mm
07-20-2011, 02:21 PM
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.