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.
60T Twin-608 Turret Ring Gear
Pan output gear and bearing hub for the 'NEMA17 Geared Radar Scan Turret' kit. It has 60 involute teeth (module 1.5, 20° pressure angle, 90 mm pitch diameter, 93 mm OD, 8 mm face) and meshes 3:1 with the 20T stepper pinion. The 32 mm hub holds two 608 bearings (8 x 22 x 7 mm) in 22.05 mm pockets, so the gear turns on the fixed 8 mm pan rod. A 50 mm top flange has four M3 heat-set insert bores (4.0 x 6 mm) on a 40 mm PCD to bolt on the turntable with M3x8 screws.
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.
Module 1.5 60/20 Compound Gear 608 Hub
A module 1.5 compound gear for a 3:1 reduction stage: a 93 mm 60-tooth gear with a 22 mm tall 20-tooth pinion. It spins on two press-fit 608 bearings (22.05 mm pockets) on a fixed 8 mm axle, so you can stack several into a multi-stage reduction for robot arms and winches.
Module 1.5 Sector Gear 8 mm Hub
A 120° sector gear with 20 involute teeth (module 1.5, 20° pressure angle, 45 mm pitch radius, same as a full 60T gear) on an 8 mm bore hub. It locks to the shaft with an M3 set screw and a captive nut. Use it to drive a pan/tilt, elevation or gripper joint through a limited arc against any standard M1.5 spur pinion, so you don't need a bulky full gear. The teeth are thinned slightly to give FDM backlash, and there are two M3 holes for bolting on an arm or link.