face mount 3550rpm 1/4 hp 230v motor from
www.surpluscenter.com part number 10-1232 $10
Axleshaft from a semifloater (I am using a samurai axle/brake drum)
Cut off the flange end, gun drill to 5/8" and clean it up. Drill/tap for two set screws.
Mount motor onto bottom of collection pan (cookpot) Pass through for the motor shaft must be "dimpled" to prevent oil from draining into the (probably) shielded bearings. Bolts must be sealed.
Machine the drum on the friction surface as much as reasonably possible for contaminant collection. Mount the axle stub on the shaft, and tighten setscrews. Mount brake drum backwards on flange, sealing the flange with sealant. Balance accordingly on the motor by touching OD while spinning to mark the heavy spot.
Mount sealed pipe flanges similar to centrifuge sticky link, but I suggest using "form a gasket" for clean oil drains.
Viola! Cheapo centrifuge. Much less capacity for contaminants than the sooper expensive bowls, due to the small lip, but it will only cost you a few sheckles at the junkyard.
Any thoughts? I have the motor on order right now.