A lazy susan for your desk: three pen cups of different heights, a slot for scissors, a two-part tray for small things and a well in the middle for clips, on a base that turns at a touch. It runs on a ring of standard 6 mm airsoft BBs in two V-grooves, and a printed pin holds it together. Three printed parts, 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.
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The foot, with a V-groove race for the BBs, a low wall round the edge that hides them, the socket for the centre pin and four recesses underneath for rubber bumpers.
The part that turns: pen cups 104, 84 and 64 mm deep, a scissor slot, a two-part tray and a clip well, on a deck with the matching V-groove underneath.
A 12 mm pin that turns in the organizer and presses into the base, where four crush ribs grip it. Its head stops the top lifting, so the BBs stay in.
For a 0.4 mm nozzle. Filament amounts are estimates for these settings.
Nothing needs supports. Turn on elephant's foot compensation in your slicer, or lightly scrape the edges of the groove under the deck, so the balls roll freely.
Lay the base flat and drop 57 BBs into the groove. They fill it all the way round with a gap of one or two balls.
Lower the organizer straight down onto the balls so the groove under the deck settles over them, and turn it a little to let them find their place.
Push the centre pin through the hole in the clip well and into the socket in the base. Press it home firmly with your thumb: four small ribs in the socket squash a little and grip it.
The top turns freely and lifts only half a millimetre before the pin's head stops it, so the balls can't fall out. Stick the rubber bumpers under the base if you like.
Push the pin up from underneath with a pen through the hole in the bottom of the base, then lift the top off over a tray to catch the balls.
Airsoft BBs are small enough to swallow: keep them, and the organizer while it's apart, away from small children.
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