Prusament spool to master spool adapter

thingiverse

This adapter lets you turn an empty prusament plastic spool into a master spool. Motivation I love the idea of the master spool, but it takes a long time to print (6+ hours for part B, 12+ hours for part A). I saw that prusament spools could fit and be reused as master spools with a simple adapter. After trying out several designs, I came up with this three-part design, where the adapter core is required, and the screw and nut are optional. This makes it faster and cheaper than printing the master spool, and also helps reuse plastic parts that would otherwise go to waste. Prusament spools have a cardboard core that you can even reuse to create something nice. Usability I actually tested this with prusament spools and dasfilament refill filament. It works fine, but the core fit is a bit tight - just do it slowly, and you'll end up with a good compact and sturdy spool. The plastic bag and silica gel that come with the prusament are also reusable for storage later. Assembly First, take the prusament spool apart by gently pulling on the two plastic half parts. You should be left with two identical plastic sides (they're injection molded) and a cardboard core. Option A: you printed just the core Place the prusament spool half on the table, put the core in it - it should match the inner lines of the prusament spool. Now put your refill filament on, making sure the three zip ties are aligned with the three slots on the adapter core. Put the second half of the prusament spool on top and use two long zipties to keep the parts together. Option B: you printed the core, screw, and nut Put the screw down, slide one half of the prusament spool onto it - the screw goes in the middle. Now put the core onto the spool half, matching the inner lines of the prusament spool. Put your refill filament on, making sure the three zip ties are aligned with the core's three slots. Put the second half of the prusament spool on top and start tightening the nut. How to print this The fastest way is: - Adapter: print with 2 perimeters, 3 top/bottom layers, 0% infill, and 100% infill at the middle part - around 3 hours of print time - Screw and nut: print with 2 perimeters, 3 top/bottom layers, 20% rectalinear infill - around 3 hours of print time Alternatively: - Print with 2 to 3 perimeters, 2 to 5 bottom/top layer, and up to 20% infill of your choice. No supports or brims are needed.