For quick test....If one doesn't care about running the spindle rotation, does a B18 need air to properly run the other functions ? (like the oscillation of the spindle)
Also, anyone care to guess the "obsolescence quotient" on the manual jig grinders ? In other words, if they were at the height of manual jig grinder popularity in 1980 (100%), what were they in say, 2000 (%?)...and 2021 ? (%?)
I suppose equally interesting would be the obsolescence percentages on all jig grinders, manual and CNC.... to what extent have the nicer VMC's made them less desirable...
Also, anyone care to guess the "obsolescence quotient" on the manual jig grinders ? In other words, if they were at the height of manual jig grinder popularity in 1980 (100%), what were they in say, 2000 (%?)...and 2021 ? (%?)
I suppose equally interesting would be the obsolescence percentages on all jig grinders, manual and CNC.... to what extent have the nicer VMC's made them less desirable...