Filament roll holder

thingiverse

This is a spool holder end cap, actually two of them. Perfect for the 30mm and 50mm spool inner diameters when hanging rolls on an 8mm rod. The stepped sizes are designed to slip inside the spool core and lock it in place, with steps at 30mm and 50mm working well with cores I have now and any that I know of currently. These should fit any of these: https://www.idig3dprinting.co.uk/news/how-to-guides/3d-printer-filament-spool-sizes/. The advantage of these, especially the slotted one, is that it slips off quickly and easily when needed, loosening the nut a few turns makes it come off. When you want it locked in place though, it's not coming off. Makes for quick and easy filament swaps. Using a core like this ensures the rod is in the middle of the core, greatly reducing drag and skipping of the roll as the filament is pulled out. The holes in the model make for a strong model, many walls generated remove any thought of crushing. The side effect is that the model prints slowly, basically solid even with 0% infill as I print with 0.8mm walls. Also, some printers hate a circular style edge on first layers as they don't stick well. Hey, print it if you wish. I like it a lot, works well for me in basic PLA and 0.2mm layers.