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Designed & printed a working gear pump (edit: added video & more info)(i.postimg.cc)

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pianoplant@lemmy.world
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Just a quick hobby + learning project. If people are interested I am happy to post more pics. PLA exterior + TPU seals + Nylon (COPA) bushings.

Everything is 3d printed except the hardware & motor. The hose adapters have 1/4 NPT ends on them. NPT has a tapered thread so I found that I could screw them in partway by hand then heat them up slightly with a soldering iron to soften the PLA then screw them in the rest of the way. Makes a nice watertight seal despite the roughness of the 3d printed threads. If they start leaking I can unscrew them (leaving behind threads perfectly molded to the fittings) then add some pip seal tape and put them back in.

What do you guys think?

EDIT: here’s a photo of the parts separate

and a video: https://imgur.com/a/cd8co68

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pianoplant@lemmy.worldOP
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Thanks! They’re offset - I’ll post a video of it working soon.

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