The best way for one to understand what turbomachinery does is to look at a turbine. Turbomachinery is when machines transfer energy from a rotor to a fluid.
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Yes, exactly.
It is a horizontal gyroscope employing a 2 degree-of-freedom gyroscope with its spin axis aligned with the earth's magnetic meridian
Here is a website that lets you put in the specifications of the bearign that you need and it will show you which to buy. from what I can tell, you will need one exactly like what you took out with the exact measurments. http://www.thefind.com/sports/browse-42mm-metric-ball-bearings
Also called Norton's mechanism, is a method of changing feed rates. You can find it on http://books.google.co.in/books?ei=OauuT-vvKdHQrQeO6rCYBA&id=_wWET38FZqsC&dq=machine+tool+design&q=meander#v=onepage&q&f=false page 101
A light sensor shines a light on the image to be scanned and collects the data as simple changes between black and white based on the level of reflection. These changes are later converted into digital form for processing.