The file 'Makerbottable Simple Spool System 3D Printer Model' is (stl) file type, size is 3.5MB.
Depreciated: This item has been replaced by version 2, a 100% printable spool holder, located at http://www.thingiverse.com/thing:8317 Please refer to that file, which is a much better design.
I liked BrokenToaster's idea of a bearing-driven filament spool holder, but that version was too big to fit on a Makerbot print bed. I separated the arms from the hub, making a tight-fitting dovetail joint to connect the pieces without any hardware. It now fits on a Makerbot print bed!!!
EDIT: At Wajazn's suggestion, I added a version that integrates a printable bearing from http://www.thingiverse.com/thing:4312 . Disclaimer, I have NOT tried to print it, but it should work.
UPDATE: (1/22/2011) I added a solid version of the integrated bearing hub that has no spokes to avoid the problem people were having with one of the hollows printing solid. I just skeined it in 0035 and it looks good.
Integrated_Bearing_Hub.stl | 14.0MB | |
I_B_Hub_Solid.stl | 11.8MB | |
Spool_Arm6_off.stl | 78.0KB | |
Spool_Hub.stl | 307.8KB |