A spool holder that works with every spool you own. The spool lies on its two rims on a pair of long rollers that turn on standard 608 skate bearings, so the hole in the middle doesn't matter: 250 g minis, 1 kg plastic or cardboard spools and 3 kg spools all roll freely, from Ø100 to Ø300 mm and up to 110 mm wide. Side walls keep the spool from walking off, and a guide arm leads the filament off the bottom of the spool towards your printer, with a pocket for a PTFE tube. No screws, no glue, no supports.
Free for personal use under CC BY-NC 4.0: print it, remix it and share it with credit to Shapekit. Please don't sell the files or the prints.
Every part as you print it. Pick colours to see what your filament will look like.
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Every STL is already placed the right way up. Download them all at once, or one by one.
The stand: a floor with two side walls that keep the spool on the rollers, open slots the rollers drop into, a socket front and back for the guide, a slit on top of each wall to tuck the loose end of the filament in, and recesses underneath for rubber bumpers.
A Ø28 × 107 mm tube with a pocket for a 608 bearing in each end. The spool's rims roll on it anywhere along its length.
The axle for one bearing: an 8 mm seat in the bearing, a collar that touches only its inner ring, and a journal that drops into the slot in the wall with its head outside.
An arm that plugs into the socket at the front or the back of the base and curves round the biggest spool to an eyelet: a funnel on the spool side, a 2.6 mm hole and a pocket for a 4 mm PTFE tube.
For a 0.4 mm nozzle. Filament amounts are estimates for these settings.
Nothing needs supports. Print the two rollers standing up (a brim helps) and the four pegs head down. Turn on elephant's foot compensation, or scrape the bottom edge of each bearing pocket, so the bearings go in straight.
Press a 608 bearing squarely into each end of both rollers, with a vice or by pushing the roller down onto a bearing lying on the table, until it stops on the ledge inside. The pocket is 22.15 mm, which prints as a firm press fit. If yours comes out loose, add a drop of glue on the outer ring only.
Push a peg into every bearing, seat first, until its small collar touches the bearing's inner ring. The seat is 7.9 mm, so it slides in; the walls hold it in place later.
Hold a roller by its two pegs and lower it into the stand so the pegs drop into the slots in the walls, with the heads outside. Give it a spin: it should turn freely, with a quarter of a millimetre of end play each side.
Slide the guide's tongue into the socket at the front of the base (or the back, if your printer is behind it). Lay the spool on the rollers between the walls, turned so the filament comes off the bottom of the spool towards the guide, and thread it through the funnel. Push a PTFE tube into the pocket on the other side if you use one.
On spools under Ø140 mm, take the filament off the top instead, so it doesn't brush the front roller. When the spool is off the printer, tuck the end of the filament into the slit on top of a wall. Stand the holder on a level surface.
Small parts: keep the pegs and the bearings away from young children.
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