It warms my heart to see the progress that Dave and George and others are making on the clock. For many like Dave this project is their first CNC project. Don't let the lack of a CNC mill discourage any of you from building the clock - I built the prototype on a Sherline lathe and manual mill and 4" rotary table. CNC now does most of my flat work, but the shafts, hubs and such are still manual lathe work. The series of articles in Digital Machinist was written for manual construction, but the drawings are adaptable to CNC as Dave has mentioned.
Dave,
My source for the bearings (and a lot of other stuff) is McMaster-Carr. Here is the page:
http://www.mcmaster.com/#catalog/118/1148/=j9w7chThe unflanged bearings are stock #57155K366
Flanged bearings are stock #57155K319
McMaster may have higher prices (not always, though) but they
have nearly everything, and they have it
in stock.
As long as I am here I might as well put in another shameless plug for the circuit board, kit, or assembly for the clock electronics. Also the coil winding service.
Look for me in Vendor's Specials and Announcements section of the BBS.
http://madmodder.net/index.php/topic,7438.0.html