NEMA17 drive gears M1.5 - 12 involute spur gears for 5 mm D-shaft, hub + set screw

**12 involute spur gears that actually drive a shaft.** Each gear has a **5 mm D-bore** and a **hub with an M3 set screw** that lands on the flat of the shaft - the standard 5 mm D-shaft of NEMA17 steppers and most 25-37 mm gear motors (flat at 4.5 mm). **In the set** - module 1.5, **10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 48, 60 teeth**, 6 mm face width + 7 mm hub - D-bore 5.15 mm with the flat, 2.7 mm cross hole: an M3 screw cuts its own thread in the plastic - 3MF plates ready for a 180 x 18…

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