LockSpool: Parametric, reusable (ONE part printed twice)
Description
**Don't click "Download All Files".** It's broken (complain to Thingiverse, not to me). Click on the **Thing Files** tab, and download the files you need. LockSpool is a reusable filament spool made from a single part printed twice, and joined together with a quick twist, with a snap-lock to hold it in place. The design can be customized to fit any spool-less filament refill coil by adjusting just six parameters. This is a good print for combining small lengths of leftover filament. I printed the parts in the photographs with a nearly-empty spool of silver-gray Prusament. You can see where I had to switch over to my blue PLA. This design produces spools compatible with these filament coils, and any others for which dimensions can be found: * [MasterSpool](https://www.thingiverse.com/thing:2769823) (750 g) * [SlantSpool](https://www.thingiverse.com/thing:2850604) (1 kg) * [Filaments.ca EconoFil](https://www.thingiverse.com/thing:2869973) (1 kg) * KVP KOIL (1 kg) * [Fusion Filaments](https://www.thingiverse.com/thing:3164353) (1 kg) Parameter values are shown below and in the OpenSCAD code comments. ### Improvements over original MasterSpool and similar designs: * Both halves are the same. Print just one part as many times as you need. * Quick twist to connect the halves, no multiple turns of a threaded part. ### Improvements over SlantSpool: * Snap-lock mechanism to keep the two halves in place. * Tie-wrap slots to aid removing and installing refill coils. * No large gaps in the hub, the better to wind your own spool if needed. * Parametric design. OpenSCAD file included. * Better CC-BY-SA license (SlantSpool has a "no derivatives" restriction). ### Improvements over both MasterSpool and SlantSpool: * Lighter weight, less material, and faster printing (41% faster than original MasterSpool, 24% faster than SlantSpool, both of which use about 1/4 kg of filament just to print one spool! The MasterSpool-compatible LockSpool is only 130 grams. * Designed for printing without top or bottom layers, improving print speed while remaining strong. * Multiple parts stack together neatly on a shelf! ### 750 - 850 g MasterSpool refills: * https://shop.3dfilaprint.com/filament-refills-453-c.asp (EU only) * https://3d-print-works.com/products/masterspool-refills-pla-filament (UK only) * https://www.anodas.lt/search?search=refill (EU only) * https://botland.store/1240-refill-filaments (EU only) * https://filament2print.com/gb/special-pla/1285-refill-pla.html (EU only) * https://www.jacksfilament.com/ (EU only) * https://ultimate3dprintingstore.com/collections/spooless-filament (UPDATE: I am no longer seeing 750 g refills on this site; they are all 1 kg for Koil and SlantSpool. If anyone knows of an American source for MasterSpool refills, let me know.) ### 1 kg refills for other spools: * https://filaments.ca/collections/all/brand_filaments-ca+stock_in-stock - for EconoFil - inexpensive when they have it in stock * https://www.villageplastics.com/the-filament-koil/ - Keen Village Plastics (KVP KOIL) * https://www.filastruder.com/collections/veracity (says MasterSpool but it's actually for SlantSpool) * https://ultimate3dprintingstore.com/collections/spooless-filament - for SlantSpool * https://fusionfilaments.com/collections/filament-coils - for Fusion Filaments spoool ### Spool dimensions in the OpenSCAD code: The STL files provided were made using the following settings in the OpenSCAD code for the different types of spools. | Dimension | MasterSpool | SlantSpool | KOIL | EconoFil | Fusion | |---|:-:|:-:|:-:|:-:|:-:| | Normal: |||||| | spool_dia | 198 | 200 | 200 | 200 |198 | | flange_thickness | 5.6 | 5 | 5 | 5 | 4 | | hub_dia | 102 | 100 | 100 | 74.5 | 76 | | bearing_dia | 52.5 | 52 | 52 | 40(*) | 41(*) | | inner_width | 46.7 | 62 | 58 | 58 | 67 | | numslots | 3 | 4 | 4 | 4 | 3 | | Others: |||||| | hubindent | 3 | 3 | 3 | 2 | 2 | | hubwall |10 |10 | 10 | 6 | 6 | | label_rot | 0 | 0 | 0 | 45 | 0 | | fontsize | 6 | 5 | 5 | 4.4 | 4.4 | (*) EconoFil and Fusion Filaments bearing diameter is made smaller here to compensate for internal structure of LockSpool hub design.
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