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.*
Six-Module Gear Tooth Rack Gauge
This 130 x 50 x 3 mm card identifies the module of a stripped gear so you can model a replacement. Its two long edges carry 20° rack combs for modules 1, 1.25 and 1.5 (top) and 2, 2.5 and 3 (bottom), and you press each comb into the old gear until one meshes with no rock. The number of small holes beside each comb gives its module: 1 hole = m1, up to 6 holes = m3. Built for fan oscillator, mixer and blender gears. m1.25, m1.5 and m2.5 are close to 20, 16 and 10 DP.
Gripper Idler Jaw
This is the idler finger of the gear-meshed gripper, part 8 of the 'SG90 Four-Axis Desktop Robot Arm' kit. It is a flat jaw 6 mm thick and 62 mm long that turns on an M3x20 pivot bolt through a Ø3.4 bore in a Ø20 hub. The hub carries a module 1.0, 20° involute sector: six teeth on a Ø20 pitch circle (tip Ø22, root Ø17.5), with a tooth gap centred toward the drive jaw so the two mesh at a 20 mm centre distance. The finger doglegs in to a ridged grip face that closes 3 mm from the drive jaw's face.
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.