What is the tool maker’s flat size which generally uses both the faces as a working surface?
(a) 30 to 45 mm
(b) 50 to 75 mm
(c) 75 to 100 mm
(d) 100 to 200 mm
This question was posed to me by my school principal while I was bunking the class.
The question is from Tool Maker’s Flats and High Precision Surface Plates in division Linear Measurements of Engineering Metrology