Centrifugal water pump for 2mm shaft motors

by Caldar Nov 10, 2014
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Have you been able to measure how much lift the pump is capable of?

I have not sorry.

My question is, when you slice this / print it using CURA, the end product seems too small - the hole in the impeller for the motor is more like 0.75mm or so......so does it need to be scaled up normally?

It has a lot to do with the extrusion multiplier, the speed and nozzle size of your printer. I'd start by using a 0.4mm nozzle or smaller. Verify your extrusion multiplier is set correctly. If all is correct, I wouldn't know why your hole gets printed that size and I'd suggest just drilling it out. The main thing is there is material to drill into, the original model accommodated a 3mm shaft and I could get it to fit my 2mm shaft motor.

No problems - I will be able to make it work by drilling out the hole in the impeller - nice design.....

Hi, I am glad the design works for you, it was a bit of trial and error my part but I though the end result was quite good. If you do need me to edit the model at all I would be happy to do that for you. Regards Lukas

Excellent. Thanks for the reply.

How well does it work? Also what program did you use to convert the stl file into something you could edit?

I couldn't convert the model, as stl format is just a mesh of triangular shapes. I used freecad to create a cylinder to fill the old hole and subtracted another cylinder from that to make a smaller hole.
The resultant file isn't entirely error free, but it did the trick :)
It works quiet well I must say I'm impressed! I've added two more photos. Using a more powerful motor definitely makes it go faster. The motor is from a hair dryer that was broken being powered by an old 12v laptop battery pack.