Here is a new wrinkle on the machinist trade. In my younger days I worked on industrial refrigeration and other equipment. We did not do the machine work, we did the field work to erect new, trouble shoot new and existing systems, and overhaul existing systems. We had to rely on the designers, patternmakers, foundrymen, and then the machinists who made the parts to make us look good. For the most part stuff somehow fit right after all those steps and hands in the pie. On the old slow machinery there was a lot of tolerence to work with but when the new high speed, tight tolerance, small spaces to work stuff came along the trade got very precision. We learned to use micrometers, dial indicators, calipers, tight wire line-up, straight edges, bearing scrapers (for babbit bearing hand fitting), bluing, plasti-gage, along with being a refrigeration technician, electrician, welder, sil-brazer, millwright, and all around mechanic. We worked on compressors of all types, pumps of all types, steam turbines, boilers, motors, electrical controls, piping, fans, later-on electronic controls, pneumatic controls, and all such. We even got into cyrogenic liquid nitrogen freezing tunnels. When labor rates started the upward spiral we started sending bearings, shafts, and etc to a machine shop for re-pouring babbit and in line boring and shaft grinding. Still had to put it all back together. Some big ammonia machines; every part had to be moved with chain falls as they weighed more than two guys could manouver. Some flywheels weighed in the tons, with big, wide, long flat belts. We even converted old hand lubricated open crankase compressors to automatic oliing systems. Today every thing is parts changing, but the precision is there for assembly except the tooling is now lasers and such for lining stuff up. The high speed stuff now you just change out the whole thing for a rebuit one and some factory does what we did in the field. Thats the difference between a shop charging $150+/hr for field workers who can do everything/anything; versus some factory paying $20/hr to narrow skilled assembly line workers.
Oh, for the good ole days when you were proud to put in a day+ of rewarding effort for a paycheck.
Ron