Prusament spool bushing which allows spools to dispense filament in a smoother way. Especially for spools on smaller diameter rods or spool holders that may bump or wobble when used with a default Prusament spool.

Designed to print as three separate parts that combine with threads. Securely hold a Prusament spool from both sides and provide a smoother internal surface for smaller diameter rods and spool holders.

Print instructions

These print instructions are ordered from easiest to hardest.

Printing with the supplied G-code

If you have a Prusa MK3/S with a 0.4mm nozzle and are going to print in PLA, feel free to use the provided G-code.

Printing the 3MF files

Change any print or filament settings you like, slice, and print.

Printing the STL files

The bushing should be printed vertically with a 5mm brim since it has a small contact area. If you are using PrusaSlicer, you can make your brim even stronger by setting Elephant Foot Compensation to 0 under Print Settings and then Advanced.

The nut should be printed so the widest part of the grips are towards the print bed. The flat bottom will be perfect for tightening against Prusament spools.

Since both parts contain threads, printing with a 0.15mm layer height is recommended.

Tips and Tricks

If you print the bushing with dark or colorful filament and a brim, you might notice a white rim around the threads after you remove the brim. A little touch up with a sharpie or marker pen that is close to the filament color is a safe way to minimize the visual difference. You could also try heating up the offending plastic to get it to reflow but that is a much more dangerous operation that could make things worse.

If you find the parts to be a bit squeaky or tight when first threading them on, do not worry. After a few uses the squeakiness should diminish as the plastic wears where it needs to. With continued use, tightening and loosening the parts should become a pleasure.

For the bushing, if you are into speed prints or want to use less filament, try printing just the threads solid. Use a modifier to print most of the bushing with hollow walls or infill. You could also further speed up print times by using variable layer heights. Just make sure the threads are printed with a 0.15mm layer height to match the threads of other parts.

For the nuts, any perimeter or infill settings should work. Just make sure to use a 0.15mm layer height throughout the part to match the threads of other parts.