Came across this ad for an old Galvanized honey extractor on eBay. You can buy a shiny new stainless steel one for less than this one will cost you by the time you paint it with camcoat and try to put together a variable speed motor drive for it. But you need to marvel at the ingenuity in it'd design.
http://www.ebay.com/itm/Bee-Keepers-Look-VINTAGE-3-PANEL-HAND-CRANK-HONEY-EXTRACTOR-/351803861772On the out side it looks like any old Galvanized extractor
It's 3 frame and has the 3 inserts to support the framed placed in the extractor tangently
The beauty in design is the drum the 3 inserts fit into to support the frames.
After extracting remove the frame supports, dump your capping into the drum, and spin the honey out of the cappings. These where designed as an extractor and capping spinner in one.
Now stick with me. 2 modifications I would do.
1- Adapt to an electric motor with a variable speed drive.
Take one from that treadmill you no longer use the older with the least features the better. All you want is on off, and the veritable speed.
2 - Adapt it so you could extract medium frames radially.
It would defiantly hold 12 medium frames I think it would hold 15 possibly even as many as 18 frames at a time. Would have to do the math to figure it out for sure. All it would take is a support in the bottom of the extractor to match the length of the end of the top bars at about 5 " away from the out side of the tub. And spacers or pins around the tub to hold the top bars in position while loading and spinning.
If I didn't already have 3 extractors and lived a lot closer and if it was in a little better condition (Inside has lost its galvanizing) I WOULD BE TEMPTED!
I admire the design though. Even to install a fixed speed motor and just use it as a capping spinner.