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.*
20T Stepper Drive Pinion
A 20-tooth involute spur pinion for the 'NEMA17 Geared Radar Scan Turret' kit. It has module 1.5, a 20° pressure angle, a 30 mm pitch diameter, a 33 mm OD, an 8 mm face and 0.5 mm chamfered tooth tips. It drives the 60T ring gear 3:1 at a 60.25 mm centre distance. It fits the NEMA 17 5 mm shaft through a 5.25 mm bore. The 18 mm hub holds an M3 set screw and a captured M3 hex nut, and the screw bears on the shaft flat.
24T Module 1.5 Drive Pinion
The 24-tooth, module 1.5, 20° involute drive pinion for the 'NEMA17 Rack-and-Pinion Parallel Gripper' kit. It has a 36 mm pitch diameter, 39 mm tip diameter and 10 mm face width, and it drives both gripper racks. A 14 mm hub, 7.5 mm long, fits into the frame plate's 22.4 mm hole. The gear goes on a NEMA 17's 5 mm shaft (5.2 mm bore) and is held by an M3 set screw that threads into a captured M3 hex nut.