This gear pump is almost entirely 3D printed. The gears and housing are printed from PLA plastic. The seals are printed from TPU, which is similar to rubber.
Thanks to the 3D-printed seals and appropriate grease, this gear pump is completely waterproof.
The pump is driven by a BLDC motor (2200kv) using 2 3D-printed spur gears. For the gears inside the pump, 30-degree angled teeth were chosen (double helical gears or herringbone gears). Because these teeth are angled, power is transferred gradually from one tooth to the next, resulting in less noise. This type of gear is normally very difficult to manufacture using traditional techniques (lathes, milling machines, etc.) but is no problem for a 3D printer, which can build any object layer by layer.
You can watch the full project in the video below: