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Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.
A 60 mm OD × 18 mm wide spoked drive wheel that slips onto any 5 mm motor shaft (NEMA 17, 37 mm gearmotor) and locks with an M3 set screw threaded into the 6.3 mm hub wall. The 8 mm × 2.5 mm rim groove seats a #64 rubber band as a tire, and 24 scallops in the flanges give traction if you run it bare — replaces the hub-and-tire set nobody stocks for one-off robot builds.
An open-top can that swallows a ball of jute or sisal twine (80 mm inner diameter, 80 mm deep) and feeds it out through a guide eyelet, with a pinch slot on the lip that grips the loose end so it never falls back inside. A keyhole on the flat back hangs it on a single screw in the shed or potting bench, or it just sits upright on the bench.