Spool Hub Spacer

thingiverse

These are designed to thread onto the hub from Vincent Groenhuis's Universal Auto-Rewind Spool Holder. By placing one on the hub before your spool, you can keep the spool centered more easily. A second one can be used to improve the stability of wide spools or in some cases as a nut to hold the spool in place! For example, the 89mm version is sized to go inside the wide half of a spool from ProtoParadigm. I thread that on first and put it almost all the way to the end before putting the spool on. Some spools have one diameter while others like these from ProtoParadigm have different opening diameters on each side. If there are other sizes folks need, just comment below or if you find the above sizes work for other spools please also comment so I can expand the table. # Usage ## Step 1: Install Spacer Install spacer on clutch side of hub. This is where the motor is attached to the shaft. ## Step 2: Insert Hub with Spacer into Center of Spool Insert hub with spacer into center of spool, making sure it goes in flush and the spool fits snug against the clutch plate. ## Step 3: Install Second Spacer (Optional) If you choose to use only one spacer, adjust it to be centered in the middle of the hub. Otherwise, install a second one from the opposite side and set it down under the edge of the spool far enough to get the nut fully seated. ## Step 4: Install Nut on Opposite Side from Clutch This is basically as normal... the only difference is you no longer have to worry about keeping the spool centered axially on the hub, the spacers will do that for you. This means that the normal flat nut can be used in far more spools in place of the curved or curved XL nut. Note: If there are gaps between the spool and the flat nut flanges, you have two possible solutions: 1. Spin the spacer IN a bit farther so that the nut has enough room to tighten. 2. Flip the nut around so that the barrel part is facing outward... the spacer will do the job of keeping the spool centered on the hub's shaft, so that functionality is not needed. Sizes That Work: * 3D Solutech: two 56mm, one on each side. Just be careful they are all the way at the outside so the spool doesn't fall with them in the middle. * ProtoParadigm: 89mm on one side, 52mm on the other. Other sizes that have been reported to work: * 3D Solutech: two 56mm, one on each side * ProtoParadigm: 89mm on one side, 52mm on the other Please let me know if you find this helpful or if you need more clarification!