What is the minimum thickness of top in a high precision surface plate?
(a) 20 mm for 350 mm dia
(b) 25 mm for 250 mm dia
(c) 30 mm for 250 mm dia
(d) 20 mm for 250 mm dia
This question was addressed to me in unit test.
This intriguing question comes from Tool Maker’s Flats and High Precision Surface Plates topic in chapter Linear Measurements of Engineering Metrology