Better Hanging Filament Spool Holder

prusaprinters

<p>Print it, snap it together, hang it up. It requires no additional parts. You can quickly depress the tabs on one arm to remove it and swap out the spool. This spool holder is intended to be hung from a standard (in the US) closet clothes hanging rod of 1.25" (about 32mm) diameter. Though, there's no reason why you couldn't hang it from anything with a smaller diameter.</p><p>Maximum width of the spool can be up to 80mm (this leaves 5mm of margin). The maximum outer diameter of the spool can be 210mm (before you can no longer hang it or take it off the rod). The minimum inside hole diameter can be 50mm. These dimensions fit all my spools from various manufacturers (most have room to spare). I didn't want to think about which spool holder would fit on which spool so it's one-size-fits-all. I'm sure you can edit the included STEP files if you want something different.</p><p>There are 45° overhangs under the tube and a 20mm bridge for the top of the tube part. When slicing this part you MUST ensure that bridging is going the correct direction. Otherwise it might try to bridge an 80mm gap.</p><ul><li>0.4mm nozzle</li><li>0.2mm layer height</li><li>2 perimeters</li><li>4 layers top and bottom</li><li>15% infill</li><li>No supports</li><li>No rafts</li><li>41.32 grams of filament per set</li><li>3h46m</li><li>PLA or PETG</li></ul><p>The connection between the arms and tube has somewhat tight tolerances. I printed this on a Prusa Mini+ without issue. You can fit two sets of holders on the Mini bed (180mm square).</p><p>There are lots of hanging spool holder designs online. I designed this one for a few reasons. First, I didn't want to add extra hardware. Second, I wanted it to be easy to print. Third, I wanted it to be easy to change out a spool without tools. Fourth, many designs include bearings (I've designed and tested some of these) which make the spool spin too easily causing a filament cascade. The larger size of the tube (50mm) means the weight of the spool is closer to center of gravity which means the spool can spin more freely (but not too free) even without bearings. Smaller diameter holders cause the spool to jerk and not spin in small increments.</p><p>I printed mine in PETG because I wasn't sure how well the arm tabs would hold up. However, after printing a set out of PLA I think it works just as well.</p>