Machinist
I guess I qualify as a "professional", since I own a Machine Shop, (we do Marine Machine Shop Work), and have been a Machinist for the better part of 40 years.
Most of the other posters have given you a good breakdown as to what the different classifications of "machinist" are.
Back in the old days, before the second World War, many of your machinist were trained in Rail Road Shops. Steam Locomotives had a miriad of moving parts, that had to be constantly maintained and repaired.
You learned everything from how to run lathes, mills, shapers, boring mills, verticles, drill presses, plus how to pour Babitt Bearings, hammer them in, bore, and then scrape them to fit, pull pieces apart, and press them back together, and the ins and outs of just about every other concievable part of moving equipment.
As the Rail Road went Diesel, (VERY little machine shop work), more of the machinist started coming out of the Shipyards and Oil Field Equipment Supplyers. When working on the various parts for Boats and Ships, you got about the same all around education as in a Rail Road Shop.
Then as airplanes took over transpotation, that industry created an entire new field for Machinist. Some of the finest Tool and Die Men, and Jouneymen Machinist, were trained in Aircraft Shops.
Then came the CNC revolution, which evolved into the CAD-CAM that has taken over just about every production phase of Machine Shop Work.
There are, however, multitudes of "job shops" that still specialize in the type of work that requires a machinist who can, for all purposes, figure out set-ups and run any machine. These are the men that make the top wage.
My shop is such a shop. The last two men I have aquired, we trained ourselves. We went to the local High School, found a couple of young men who could think on their feet, and trained them. One has been with us 9 years, the other 7, Both make $30 an hour straight time, get two weeks paid vacation, 8 paid holidays, Medical, and Uniforms. That, and 10 hous of over time quite often.
These young men, (and two others we have), can do anything I ask, from machining large propellar shafts, making bushings, cutting keways, (internal and external),boring millset-ups, making large nuts, bolts, drill holes, dis-assemble and re-assemble equipment, or just about any other work that can be performed with the equipmemt on hand.
When I state out with a new man, the very first thing I instill in his thought process is this: "It is not enough for a good machinist to simply know HOW to do things". A good Machinist must have a thorough knowledge as to WHY you do things". That includes the basic concept of how varied pieces of machinery work together, the requirements and priciples of rotating machinery, and the understanding of materials, the understanding of threads, bearings, running fits, interference fits, deflection, and runnout.
Think about it. If you know WHY things are done a certain way, and the why to the general areas I mentioned, then there are no mysteries.
The shame of it is that most of our Apprentice Programs that were sponsored by the large Oil Field Shops and Shipyards went away with the big reccession of the 80's. I am fortunate to have the men I have.
In all honesty, what passes for a Machinist in todays world is simply a Machine Operator. But, that is what Industry wants. Put the sophistication and capability in the machine, and hire someone for $8 an hour to sit and watch it cycle.
If you want to be a Machinist, one thing you have to find out is where in the Country Machinist are needed. The oilpatch is a good place to look, so are the coastal areas that have a lot of shipyards and refinerys and require shops to do one piece work. I leave out the Aircraft Industry, because more and more, this is taken overby the CAD-CAM concept.
Thereare multitudesofsmall job shops scattered all over the country, manycrop up around a certain industry.
In a shop like ours, there is little fear that our type of work can be displaced by CAD-CAM. 90 percent of what we do is repair, usually on something that looks like exactly what it is. A piece of machinery that has been subjected to the rigors and destructive aspect of the Marine Industry. Some times you have to remove 1/2 inch of scale, rust, and dead oysters and barnicles just to see what you have.
I am not that familiar with Trade Schools. I have a feeling that many are simply teaching students how to "paint by the numbers". But, at least, you will get a basic education as to the general concepts in Machine Shop Practice.
That is, untill you come into a shop and the owners says, "forget all of that, I will teach you to do things the way the real world does it".
Good Luck.......jackie