Vacuum-Pump Friends!

Would love to get verified Part#s on these bearings, and a known-good source for them. Have you guys acquired these bearings on-line?

SKF site part listings, for example, show at least 6 626 bearing variants, with no clarity as to number of balls in race.

Have we agreed that an 8-ball bearing - vs. 6 - shouldn't matter, as long as quality is high? Or is there some compelling argument - better lubrication? better heat dissipation? - for using the 6-ball variety?

In terms of Physics, I'd be hard-pressed to believe that an 8-ball variety should be any worse in heat dissipation; ie, even more surface area for convection, with plenty of good oil circulation, etc.

If it's a really critical application, please advise! Or are we beating this poor dead horse even deader?!

__________________
'83 300 SD
'68 Triumph TR 250 - The only car I ever loved more than the Mercedes; who needs electricity, anyway? - Damn, why did I sell it?!
'59 Jaguar 3.4 'Le Chat Noir' - Damn, why did I sell it?!

It's difficult to make predictions, especially about the future.
- Niels Bohr