01-11-2018, 05:43 PM
That last book series that I posted was written in 1919 as educational material (for apprentices, I suppose) and everything in it is amazingly applicable today. (For some reason, the author left out CNC machines 
LOL.)
There is even material about vertical mills, which I thought were a relatively new development, maybe during the 'forties. (Those described are "real" vertical mills, not just horizontals with a detachable vertical head, although those are also discussed. They aren't what we call "turret head" mills, however.)
Most surprising to me was that, even in 1919, high speed steel tooling was being used. I thought that development occurred in the late 'thirties !
Fun reading - the drawings and photos are really cool !
LOL.)There is even material about vertical mills, which I thought were a relatively new development, maybe during the 'forties. (Those described are "real" vertical mills, not just horizontals with a detachable vertical head, although those are also discussed. They aren't what we call "turret head" mills, however.)
Most surprising to me was that, even in 1919, high speed steel tooling was being used. I thought that development occurred in the late 'thirties !
Fun reading - the drawings and photos are really cool !