The file 'Two Piece Filament Spool Holder – Rigidbot 3D Printer Model' is (stl) file type, size is 4.6MB.
This is a "universal" holder that spins on to your filament spool centering it on an 8 mm rod - as found in the Rigidbot. It's a variation on several similar designs on Thingiverse. There's sufficient slop in the threads that it should connect smoothly after printing. It's in two pieces, making it a little easier to put together than a three piece (two ends and a threaded rod) design.
Inspired by http://www.thingiverse.com/thing:940762 who has a three piece design, where at least with my printer the clearances were very tight.
ADDED: Versions 4 and 5 are for where you need a shorter rod.
ADDED Version 8(fat) are short wide ones for spools with big holes (like Sunlu)
I use this in conjunction with my clip-on filament feed http://www.thingiverse.com/thing:1570573
The combo prevent tangles and misfeeds.
endpiecerod8fat_fixed.stl | 578.7KB | |
onepiecerod3_end_fixed.stl | 668.8KB | |
onepiecerod3_fixed.stl | 1.2MB | |
onepiecerod4_fixed.stl | 1.6MB | |
onepiecerod5_fixed.stl | 8.2MB | |
onepiecerod8fat_fixed.stl | 822.0KB |