TIL only 3 in 10 CNC machinists ever get formal training on reading GD&T symbols

Vera Lewis · 2026-10-16T18:20:03.075128+00:00

Saw that stat in a survey posted on a machining forum last night and it honestly tracks with my own experience. I picked up tolerance stacks by watching a guy at my first job in Dayton eyeball parts on a granite plate, never had a single class on it. How did you all learn GD&T, formal class or just getting thrown on the floor?

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TIL only 3 in 10 CNC machinists ever get formal training on reading GD&T symbols | CNC Operators - Thought Shares