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Mini air Compressor?

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Mini air Compressor?

Unread postAuthor: Spudgun on Crack » Wed May 21, 2008 4:12 pm

I am looking for a small 12v on board air compressor. I found cheap ones on ebay for about $8+$8 shipping but they all have schrader connectors at the end of the hose.

I do not want a schrader valve but a 1/4in npt port so that I can hook my compressor up directly via piping or hosing. This will be used to pump up a small 1gal tank for my pneumatics to use.

Bottom line is that I need a mini 12v compressor with a 1/4in npt out port.

Does anyone know where to get one??? For cheap, less than $10.
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Unread postAuthor: POLAND_SPUD » Wed May 21, 2008 5:56 pm

don't buy them.... 12V compressors suck... really I had one and it broke down after aobut 2 weeks... everyone who had them would tell you the same... buy a normal compressor... build your own high pressure pump or build one of these --> http://www.spudfiles.com/forums/my-comp ... 11866.html
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Unread postAuthor: Spudgun on Crack » Wed May 21, 2008 6:16 pm

I own a 33 gallon 1.5hp craftsman compressor but its not exactly "Portable" which is why I want to get one of these.

When you say they suck do you mean it pumps slow or that it breaks? I can buy a more expensive one from homedepot for $10 and if it breaks I can return it.

I would only be using this thing to pressurize a small 6-12in long tank at 1-2in in diameter.

Can it pressurize a 37 cubic inch tank to about 100psi in under 1 minute? Thats really all I need to know.
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Unread postAuthor: MrCrowley » Wed May 21, 2008 11:07 pm

A floor pump would be a far better investment then a crappy 12v.

They're slow and they break, they're not meant to pump such large volumes for so long.

$10 is hardly expensive, spend $20 and get a very decent 250+ PSI floor pump.
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Unread postAuthor: jimmy101 » Thu May 22, 2008 9:53 am

Like others have said, those little pumps are not very sturdy.

If you must use one then I wouldn't bother looking for one with an npt outlet, you won't find it. You don't really need it anyway. The outlet of those pumps is almost always a clamping female schrader. So, put a schrader on your chamber and just use the clamp on the pump's hose to hold it in place. That way you can still use the pump for its designed purpose.

Alternatively, chop the fitting off the hose and get a suitable hose barb to npt fitting and a hose clamp.
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