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Thanks FredGarvin, That's the information I was after.

Yes and no. Since the bearings are to be use in a prototype, life was not deemed important. We have ended up using some hibrid bearings (stainless cage with ceramic balls). Any info on non-contact air bearings would, however, still be of interest. Many thanks, jmarc.

airuno, Here is how mastercam works: An NCI file is generated by the software which contains tool, cycle and cutter location information. The file is set out as follows: CYCLE PARAMETERS For example, a rapid move would be defined by the following 2 lines: 0 10.5 3.8 1 0 In this example, the...

Hi, We have found that for simple 3 axis machining, it is sufficient to modify an existing post to suit our needs. generic posts are usually supplied with CAM software. However, for more complex and specialised machining, (eg 5 axis maching of complex surfaces), we have found that writing our...

ok, here's some more information regarding the setup: shaft is approx 100mm long and supports a rotor at each end. one end is an aluminium impeller approx 400g, and the other is an inconel rotor approx 2000g mass. assembly is to be precision machined and balanced in accordance with aerospace...

Hi, Could anyone please explain to me how air bearings may be used to support a shaft (approx 1" dia) rotating at high speeds (70,000rpm). It seem to me that mechanical bearings would have a limited life at these speeds. Many thanks.