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.*
Eccentric Input Cam
This is the input eccentric for the 'NEMA17 Cycloidal Joint Actuator' kit. It clamps onto a NEMA 17's 5 mm shaft through a Ø5.2 bore, using an M3 set screw that threads into a captured M3 hex nut. Its Ø24 lobe sits 1.5 mm off-centre and drives the 15-lobe disc. The part is 30 mm across and 10.5 mm tall, and the Ø30 thrust collar holds the disc up.
16-Pin Cycloid Ring Housing
This is the ring-gear housing for the 'NEMA17 Cycloidal Joint Actuator' kit. It is a Ø96 x 18 mm ring that holds sixteen 5 x 18 mm steel dowel pins in Ø5.3 through-grooves on a 34 mm pitch radius, and clamps between the base plate and the cover with four M3x30 SHCS through Ø3.4 holes on the R42 circle. The disc lobe tips reach r 34.3 mm, so the Ø68 bore is relieved to Ø69.4 across the disc zone. Ø66 lips at the top and bottom wrap each pin about 224° so the pins can't fall inward.
NEMA 17 Cycloidal Reducer Cartridge
A 16:1 single-disc cycloidal gearbox that bolts directly to a NEMA 17 face (31 mm square M3 pattern, 22 mm pilot boss recessed, 5 mm shaft), giving a hobby robot joint high reduction and low backlash in a 66 mm dia x 22.5 mm stack instead of a €1000 harmonic drive. It prints as four nested pieces in one job — pin housing, cycloidal disc with six 6 mm output pins, eccentric cam with an M3 grub screw, and an output carrier with three M4 mounting holes on a 38 mm circle.