magnetic bearings

We have at present stal s73 screws installed at the office complex where I work as a refrigeration tech. They are over 30 years old and are to be replaced in the winter with york centrifs. The yorks have magnetic bearings wich I have heared about but hav'nt come across yet. Out of interest has any one had any experience with them. regards dill.

Hi Dill.

Here is some information on the subject,
http://www.skf.com/portal/skf_rev/
http://www.synchrony.com/magbear.htm

Chemi

cheers chemi, I will go there when I get back from the chip shop.

I new nothing about Mag bearings. I do now! :) Many thanks Chemi.

I had some questions about them .
1) how are the controls for the magnetic bearing.
2) have they been tested to work in specialized environments like offshore / ships etc.
3) how good are the bearings from maintainability and reliability point of view?

Thanx in advance