Nut for spool from 40mm to 80mm inner hole, and up to 80mm width

prusaprinters

The original design contains 2 type of curved nuts (standard and XL). To match all of my spools and make sure they always stay centered, I had to print both versions, which is not the best solution from my point of view. All I wanted is a single nut capable to handle all sizes.I designed this one less curved (better to keep the spools aligned with the shaft whatever the inner hole size), thinner as possible to be compatible with the largest spool I have (AmazonBasics, 77mm width), while consuming as less plastic as possible.You can see on the pictures how it fits with the different spools. I tested with Eryone, AmazonBasic, Sunlu, Prusament.I included the Fusion360 file as well as the STEP file if you want to customize the size and shape.Print it with 0.2mm, infill 15%, no raft, no supports, no brim.