Bar to prevent spool from being pulled

thingiverse

ThingMaker72 created a great spool holder that I use. In the comments some people said that spool would get pulled off of the bearings when there was a small amount of filament left on the spool. I wanted to fix this problem so I designed a small addition to the latest version of the spool holder that should prevent the spool from being pulled. There are three parts. The main part is pushed on one side of spool holder. Then you attach the bar with the nut as close as possible to the inside of the spool to prevent it from moving in case it gets pulled. You can also print two bars and two nuts and put them at top and bottom of the inside of the spool. All three parts should be printed with 50% infill. Nut should be printed with 0.12 mm layer height to make sure the threads are printed nicely. The other two parts should be printed at 0.2 mm layer height. I also slow down the printing of the bar when it reaches the height where the screw thread starts. This way you get a good quality thread. You will need supports for the holder part. They can be removed fairly easy.