RepRap Filament Spool Holder (side mount)
I use this filament spool holder with my Mendel RepRap. It is 3 parts. Parts 1 and 2 I would print at at least 50% fill, but part 3 (the bearing part) can be printed at 10-20% fill. I printed this in PLA at 215C hot end, 60C heated bed, held with 2 M8 threaded rods and 10 M8 nuts, the clamp (part 1) needs 2 M3 bolts and nuts which must be hand tightened.
Note that the inside diameter (ID) of part 3 may vary depending on the ID of the filament spool. I have included a part3 with ID of 58.5mm, 57mm (56.75mm), and 50mm. I have provided the blender files so you can adjust the internal cylinder size to the diameter you need if different from 50, 57 or 59mm.