Hey, Nice Thunder!
You can count me as a follower of Fantom. I've come to really like their machines! Cyclonic separation fascinates me, so naturally I like Fantom vacuums. Their history only increases my level of interest. These vacuums were made by Iona, later called Fantom Technologies, under license from Dyson before he sold cleaners bearing his own name in the US. You can clearly see Dyson's designs not only in the cyclone setup, but also in the hose system. To top it all off, the machines look striking and perform well!
That is a great machine you have. I own a 12 Fantom Thunder myself--one which was apparently factory refurbished in 1999. I like to joke that I own the only classic Fantom made in the USA, not Canada. It says so right on the tag!
It's funny you mentioned the brush roll bearings; the ones in my Thunder needed attention, too. For just a couple of bucks, I replaced both of them. Now the roller spins silently and effortlessly! The details of the treatment I gave the brush roll are in my thread linked below. See replies #23 and #26.
Do not oil the bearings. Rolling element bearings, such as the ball bearings used in this brush roll, require grease, not oil. I hate to say it, but oil will only make a bad situation worse, thinning out whatever grease remains in your old bearing, accelerating, wear, and potentially making a mess on the carpet. A high temperature grease is the correct selection for these bearings. I recommend a product called Mobil 1 Polyrex EM--great stuff.
That said, I'd still recommend just replacing the bearings. It's so straightforward and cheap--626-2RS bearings are just a couple of bucks on eBay--that replacement is the clear choice.
Good luck! Let us know how it works out.
http://www.vacuumland.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?35501
