Hi Jonathan!?
I haven't had a chance to use the Aigner/Felder circle cutting jig quite yet, but here are my impressions based on handling it:
-- Jig is made out of machined baltic birch -style plywood and steel.?
-- Jig ships in three basic parts: Primary part of the jig, a support piece, and a wrench
-- Primary part of the jig attaches to aluminum table extension (Aigner or Felder) via a steel bar that slides into the t-slot, fastened through the top of the jig using the supplied spanner wrench
-- The support piece uses a pair of magnets to fasten to the cast iron top. I've seen some photos that indicate that, at least at one time, there was a version that attached to the Aigner or Felder mounting bars, so there may be multiple versions out there
-- The spanner wrench has a little steel tube welded on to the top, which holds the hardware for fastening the material to the jig, either a sharp brad point, or a 8mm stud. Either hardware is fixed to the jig via a threaded stud.?
-- The jig can be flipped upside down to accommodate different feed directions. For instance, the jig can swing "left-to-right" for a band saw, or "right-to-left" for a shaper or edge sander.?
-- Using the Felder aluminum table extension (1m), it looks like maximum cutting diameter is in the ~48"-50" range, at least on my saw. I'm aware that the Aigner table extensions can be linked together, so with that setup your diameter is limited by your available shop space.....
-- I primarily intend to use this jig on my band saw, but I can see some interesting uses with a shaper and/or oscillating edge sander.?
I hope this helps!
Tom Gensmer
Heritage Home Renewals, LLC
Minneapolis, MN
Tom Gensmer