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.*
Print-In-Place Oldham Shaft Coupler
A three-piece print-in-place Oldham coupling that joins a 5 mm stepper/gearmotor shaft (5.3 mm bore) to an 8 mm smooth rod or shaft (8.3 mm bore) while absorbing parallel misalignment instead of side-loading the bearings. Ø28 mm hubs, 34 mm tall overall; dovetailed sliding tongues keep the stack captive, and each hub has a flat boss bored 4.0 mm for an M3 heat-set insert and grub screw.
Rack And Pinion Linear Drive Block
A print-in-place module-2 rack and pinion linear drive: a 150 mm toothed rack slides through a 60 x 54 mm housing while a 16-tooth pinion (32 mm pitch dia, 100 mm of travel per turn) turns on a 5.3 mm bore for any 5 mm motor or gearmotor shaft, locked with an M3 screw into a captured M3 nut in the top collar. The housing bolts down through four M4 clearance holes and the rack carries two pairs of M3 heat-set bores on top for your carriage — a cheap linear actuator for gate, hoist, feeder and camera-slider builds where a leadscrew is too slow.