Spool hub for 1.25" ID spool

thingiverse

Simple, fast-printing hub for spools with a 1.25 inch ID. Fits up to a 5/16 inch center rod. Beveled inside edges make it easy to fit the rod through even when drowsy. This is not a friction fit hub, it's designed to be held in place with a small drop of superglue. If you want a friction fit, scale it up by several percent. Use this part at your own risk - I take no responsibility for any injuries or damage caused by its use. I print with 0.2mm layer height and 20% infill. This hub is always the first thing I print with a new spool, as both an indicator of its immediate usefulness and to test the quality of the filament before starting more complex prints.