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External Gear Pump

oatmonster

External Gear Pump
November 19, 2013 09:49PM

Registered: 10 years ago
Posts: 6

I've been working on a 3D printable external gear pump that I eventually plan on using for printing with pastes. Right now it pumps pretty well, but there are some major leakage issues around the threaded rod that serves as the driven axel.

Chocolate syrup video: [www.youtube.com]
Water video: [www.youtube.com]

Reply Quote

RossWindows

Re: External Gear Pump
November 25, 2013 10:33PM

Registered: 10 years ago
Posts: 12

Looks like it works pretty well. If it's critical to avoid leakage, look into peristaltic pumps; they're really easy to make.
I have a small one from inside an old Epson 740. The tube has an ID of about 1/16" and it pumps chocolate syrup well.
It's funny that we both went to chocolate syrup to test thick liquids grinning smiley