many easy ways to fix that problem, any good fitter knows that,
tricks of the trade as any trade has. there's expanding fitting with heat
there's shrinking with cold material, there is peening with a hammer
there are shims of copper, and there is a permanent fix of weldung
liquid welding, the list goes on, and on. 
Anybody who regards an accountant as a professional and a plumber as a non professional is likely to get financial advice and plumbing, neither of which will hold water.
As a Fitter and Turner we worked to tolerances of 2 - 4 thousands of an inch - every day. The amount of interference required between the shaft and the bearing can be determined in a number a ways (generally by the book). Then one day, after a nasty run in with a graduate engineer I decided that if someone that stupid could be an engineer than I could be as well. Now I is one.
So as an engineer I have can get away with posting this:
You might be an engineer if...
Choosing to buy flowers for your girlfriend or upgrading your RAM is a moral dilemma.
You take a cruise so you can go on a personal tour of the engine room.
In College you thought Spring Break was metal fatigue failure.
The sales people at the local computer store can't answer any of your questions.
At an air show, you know how fast the skydivers are falling.
You bought your wife a new CD-ROM drive for her birthday.
You can quote scenes from any Monty Python movie.
You can type 70 words per minute, but can't read your own handwriting.
You comment to your wife that her straight hair is nice and parallel.
You sit backwards on the Disneyland rides to see how they did the special effects.
You have saved every power cord from all your broken appliances.
You have more friends on the Internet than in real life.
You know what stands for.
You look forward to Christmas so you can put the kids' toys together.
You see a good design and still have to change it.
You think that people yawning around you are sleep deprived.
Your laptop costs more than your car.
Your wife hasn't the foggiest idea of what you do at work.
You've already calculated how much you make per second.
You've tried to repair a $5 radio.
Select to expand quoteactiomax said..
As I said a well trained fitter &Machinist & I know plenty of people who claim to be fitters but in reality are not & a fitter working on the oil wells in Alaska do earn more than some doctors just like people who drive big trucks in mines do . Not every doctor is a neurosurgeon just like fitters there are bad doctors also But unlike doctors fitters don't have the option if they stuff it up a bit it might heal alright anyway.
There is not a lot of precision work required of a fitter on a mine or construction site but that is where the money is. Probably shaft/drive alignments would be the most of it.
Not much technical challenge on these sites for a highly trained fitter AND machinist. Most sites will accept motor mechanics as fitters.
Using a podgee bar to fit bolts and nuts to join fabricated components is really a T/As job under the supervision of fitters but the rules require the trade certificated person to do it.
Other trades see this and think, "Who couldn't do that?"
I was in a situation at the Curragh Mine at Blackwater where I was paired up with a young egotistical prick who was only just born nine years after I had completed my apprenticeship and he was trying to tell me how to suck eggs. Sheesh. A farm boy from Childers.
I just agreed with him and proceeded to out class him.
Before going to the job I asked the crew manager what tools I would need and that I did not do spanners over 32 mm. He said just basic hand tools and that the gang box would have all the spanners I would need. So I turned up with my 400 x 200 x 200 tool box which had about 20 kilo of tools in it and the rest of the crew are sneering at it.
The prevalent attitude seemed to be "He who has the biggest tool box, obviously has the biggest dick." Then when we are heading back home at the end of a hitch with five of us in an older Hilux Dual Cab following a B-Double tanker down a hill towards a bridge after which the road goes uphill and around a blind bend and it is double centre lines all the way, the idiot driving pulls out and overtakes the B-Double.
After that I drove my own car to the site but with the continuation of the battles of egos on site, I decided the money was not worth my safety and pulled the pin.
