Filament Sample Reel

Description

**V2 Update** I've added a set of V2 parts. The V2 parts should be backward-compatible with all V1 parts, however, there are improvements: * The Screw end has 1 mm shorter threads to ensure that the parts screw together with no gap on the inside * The Screw end now has keeper holes for both 1.75 mm and 3 mm filament * Bases are now available in 60 mm (V1 size), 40 mm, 30 mm, and 20 mm widths The 40 mm was a bit too wide to save any room in my filament box, and the 20 mm was too narrow to easily load filament, so I added ao 30 mm version that should be, as they say, just right. I've left the V1 parts up just in case someone wants them, but there should be no reason to print them anymore. ---- **Yet Another Filament Sample Spool.** I couldn't find one that fit my needs, so here is my design. It has an inside diameter of 70 mm, so small coils of filament fit easily. It has an outside diameter of 180 mm and a width of 60 mm so it fits normal filament spool holders, and the outer edge is fixed so edge-riding holders will work as well. Printed in two parts, the "Base" has one flange and the entire exterior hub. The "Screw" is the other flange and threads into the base. It is designed so that the base can hold the filament entirely, and the screw doesn't need any clearances to be attached. No rafts, no supports, no brims. Just orient the STLs flange-down and print away. There should be zero overhangs. the threads are a generous 2 mm pitch with a 6g4g fit and should print and mate easily on any printer. I used 10% infill because of the small inner area, but you could probably get away with 0%. Most edges are filleted, so the print time is a bit long, but it makes for a more friendly print and a smoother roll on edge-rolling spool holders. * Outer Rim Diameter: 180 mm (≈7⅛″) * Outer Hub Diameter: 70 mm (≈2¾″) * Inner Hub Diameter: 60 mm (≈2¼″) * Inner Hub Width: 60 mm (≈2¼″) The spool holder shown in the first photo is MartinMajewski's awesome "[Prusa i3 MK2(s) & MK3 Spool Holder - Frame Mount - Top Loader](https://www.thingiverse.com/thing:1832235)"

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