DIY Hyd Pump

[fhhhstix]

The current drain with the fans will never be noticed less drain than a couple led's.

Travis

[doodlebug]

Hey Travis, now I'm going overboard!
http://www.compusa.com/applications/...&sku=A406-2022 Just a thought. No Cat part #, what the heck! Slight modification neccesary
Hey Pugs, figure the basic pump out, then what about adding a relief valve to the pump body later? I can throw a few a few sketch's your way, if interested? Less external plumbing to leak
Later, Neil#2 aka doodlebug.

[pugs]

An internal relief on the pump is no big deal, neither is an external one for that matter. I can see alot of different valves that could be made eventually to give more options similar to what is available for full size stuff. Like maybe a double lock valve to keep cylinders from drifting when the pump is not running etc etc.

Yeah I saw a liquid cooled CPU radiator the other day and thought it could maybe be converted to be a hydraulic cooler as well.

[doodlebug]

Hey pugs, 90mm may be to big, but I was hoping somebody else, would show a smaller one. I now there's smaller muffin fan's available.
Have you seen these hone's for small bore? http://www.brushresearch.com/
Later, Neil#2 aka doodlebug.

[pugs]

I already have a Sunnen hone and some small mandrels, just have to relearn how to use thing again, been awhile.

Slowly but surely I'm piecing together whats needed for pumps etc. Will have to get a test stand made up that I can give the prototype pump a good workout once I get it built. I think it all will work, just a matter of finding the time to get it done.

[doodlebug]

Hey Pug's, sound great

Later, Neil#2 aka doodlebug

[iaindunn]

DIY pumps are not that hard to build..just require care an lapping in to get the clearances to a minium. I have built around 4 pumps varying from 10 bar at 400ml /min9mod 1 9 teeth x.1" deep) to a 30 bar monster at over a litre /minute (eats current this one!) mod 1 gears 10 teeth x.25" deep at 3000 rpm. I did try an axial piston pump . The extra parts and complexity were not worth the increase in volumetric efficiency at this scale. A gear pump can be built in a day in a workshop with mill and lathe. You could do it with lathe only as my first pump was done.

[doodlebug]

Hey Iain, thank's for sharing this info. I didn't have any luck finding small commercially available pump's last month at Conexpo/Conag.
Later, Neil#2 aka doodlebug.

[GerryK]

jaindunn

Could you tell me where you get the gears for your pumps

Gerry

[iaindunn]

You can buy ordinary mod 1 or.8 gears either brass or steel. Specially shaped gears make no difference at this scale.Suppliers in UK are Conrad or HPC gears. I cut my own gears because its fun though.

I