generator's bearing machining.

The next task I supervised was the machining of the generator's bearing. My company is not specialized in generators repair but a review of the mechnical part of this machine very often is included in overhaul scope.
I am going to present only small element of whole turboset outage.
I do not remeber what was wrong exactly with generator's rotor but its journal was machined, and a diameter was decreased. It such case is a technical correct to decrease the bearing's clerances which is imposible without supply of the bearing with new, smaller internal diameter.
We used support of bearing suuplier described in my previous post but in this case they were responsible only for rough machining as we wanted to do rest of operations on our own.
Firstly, just after we received rough bearing my colleagues carried out the US NDT, to check if the "white metal" adheres good enough to bearing casing.
The next step was the hand processing of the bearing's surface. The lower and upper part have to fit to each other with special conditions - no clearance and the fitting trace has to be visible on ~ 80% of the surface. This demand can be obtain by grinding.
Than we put a metal plate between both parts of the bearing. I mentioned in my previous posts that internal shape of the bearing is lemon/ellipse shape, this is why the plate is needed. After bearing machining it will be removed and we will get, what we want to.
Next is the machining of the internal diameter, when done the surface metal plate are removed and again bearing is assembled on the lathe to machine oil seals and the external diameter.
Now, we can start the last part of the maching - the internal details for lube oil inlet and lift up oil. The major is done on lower part of the bearing.
The last activity was to clean holes for vibration and temperature sensors.
This bearing's ovehauls was done under the client preassure , so we worked during the weekend to send the part as quick as possible.
We managed to do it and a day after I had a phone call with our site supervisor to discuss some dimensions but a couple hours later he confirmed that turbine is closed and ready to be launched. I have not had any news related to this turbine, which means it is ok.
It was quite fast job under the preassure of time but we succed to do properly without mistakes