Spur Gear Set #01 – 10 Involute Gears, Module 1 / 1.5 / 2, 12-40 Teeth, NEMA 17 D-Shaft & 8 mm Bores | STL + 3MF

**Spur Gear Set #01 — part of the Maker Mechanics series.** Real involute spur gears for your robots, gearboxes and test rigs — not just gear-shaped decorations. Ten gears in three modules (1, 1.5 and 2, 20° pressure angle) from 12 to 40 teeth. Each has a hub with an M3 set screw and nut slot; module 1 gears fit 5 mm D-shafts of NEMA 17 steppers, the bigger ones 8 mm shafts. Same module = they mesh. ### All versions in one download - **m1 · 12 teeth** — `mm01_gear_set_m1_12T.stl` (16 × 16 × 13…

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