question about vacuum pump

[kylehiroyasu]

okay so i'm looking at buying a pump on ebay and im curious as to what im looking for? obviously it needs to be able to pull ~28hg (inches of mercury) but what else am i really looking for? another question is what is the significance of ultimate vacuum (measured in microns), what does this mean? help would greatly be appreciated! :]

[OAC]

Joe Woodworker is the perfect place to check out! Answers all your questions. Not the one you wanting 28 inHg...:-) (I'm perfectly alright with 22 - 23, but that's me...)
http://www.joewoodworker.com/veneering/EVS/concept.htm

[kylehiroyasu]

okayyyy, so after reading up about them a bit more i came up with this, will it work?

http://cgi.ebay.com/Thomas-Piston-Compr ... _617wt_958

[heliski989]

http://www.harborfreight.com/cpi/ctaf/d ... mber=98076

[kylehiroyasu]

THANK YOU! :]

[OAC]

And do as "Joewoodworker" says! And you will have a solid set up! I made my "reservoir" a little bit bigger than the examples. For the purpose to evacuate my bag quickly. But that's up to you. Just experiment! Good luck!

[H-man]

beware that the little cheap vac pumps may not be designed to run for hours on end. The use of a reservoir and a pressostat regulator switch can reduce the running of the pump. Joewoodworker has these and there are some other designs over at dream-models com/eco/vacuumpump.html