Roller version of SPANNERHANDS Spool System Wall Mounted Spool Holder & Dust Cover

thingiverse

All credit for this design goes to Spanner Hands. It's his creation, and I simply modified it. You'll need the top and bottom that I modified, four bearings listed below, and two rollers. All other parts are identical to Spanner Hands' box and can be found at https://www.thingiverse.com/thing:2119644. I really like Spanner Hands' spool holder for keeping moisture out of my nylon and polycarbonate while printing. I made the windows from an old clear 2-liter soda bottle. First, I printed one window as a template to cut two more windows from the bottle using it. Then, I glued them down with some superglue to hold them in place well since the bottle plastic is bowed. After that, I applied a bead of hot glue around the edge of the window on the inside to make sure they stay and are air-tight. For the seal, if you have something soft like Ninja Flex, print it as is. If you have stiffer TPU (I can only print firm but not soft), change the Z height in your slicer to 4.1 or 4.2mm instead of the standard 5.x setting when slicing the seal. This ensures that it closes properly at the front since stiff TPU cannot squish down. Modifications I made: 1. Removed the core/roller parts. 2. Designed a roller that fits in the bottom but is smaller. 3. Added mount points to drop rollers for different diameter spools. 4. Widened the side walls by 0.3mm so they turn out solid with a 0.5mm nozzle, making them a total of 2mm wide. The roller has a pin on each end that fits into a bearing and a lip to keep the spool from jumping off the roller and sitting outside the non-spinning bearing. The bearings I designed it around are some old extruder bearings (6mm ID x 13mm OD x 5mm W) but fit this project perfectly. You can find similar bearings at https://www.amazon.com/gp/product/B00K86FC86/. I made a v2 of the roller shortening it by 1mm to prevent tightness, widened the bearing holder by 0.1mm for easier insertion, and created a hinge pin so you don't need to cut threads or deal with bolts. Print out the hinge pin and its end cap using a 3mm screw to connect them. I found that for standard diameter spools, the best roller position is first and sixth notch. Note: I'm not sure if the printed pin would be strong enough to hang from the wall/2020 mount included in the original design, so you may need to use a threaded rod like the original instead.