Filament spool with scales

Another 1kg filament spool Warning! Pretty long print.. This is what I print when I have nothing else and the printers collect dust. The radius scales are in metric, imperial and the guesstimated filament length is in meters (up to 600m). The spool should be wound pretty tight for the estimated length to be kind of accurate. I have assumed a 95% packing efficiency, which is a bit optimistic to be fair, but is roughly what I get when using my own spool winder (..soon™). Printing: Print the barrel or the thread test models first and make sure your printer is accurate enough. I really recommend 0.1 to 0.15mm for the flange with scales. And don't turn on ironing (see the photo) Outside dimensions: Diameter: 200 mm Width: 85mm Inside dimensions: Width: 76 mm Barrel OD: 65 mm Barrel ID: 50mm Label: Width: 41 mm Height: 20 mm