Help in finding a good VACUUM PUMP

[E=MC2]

I need help in finding a good VACUUM PUMP in de-gassing my molds.
I got one at Harbor Freight but it does not go 29M. What do I need? one that
JB DV-142N 5 CFM 2-STAGE 1/2HP VACUUM PUMP - eBay (item 160507965870 end time Dec-17-10 15:33:28 PST)

Thanks

 

[ClearCaseMan]

29 hg is pretty good for what you are doing. another thing you can do that is recomended on smooth-on's website when working with their crystal clear 200 series is to vac it then pressure pot it. im building a pot now from a harborfreight paint tank that i can vac then put 60 psi to it. my pump will do 30hg but it takes a while to pull the full 30"full vaccuum" the pup you have will prolly do the 30 if you leave it running and everything is sealed good.

 

[E=MC2]

29 hg is pretty good for what you are doing. another thing you can do that is recomended on smooth-on's website when working with their crystal clear 200 series is to vac it then pressure pot it. im building a pot now from a harborfreight paint tank that i can vac then put 60 psi to it. my pump will do 30hg but it takes a while to pull the full 30"full vaccuum" the pup you have will prolly do the 30 if you leave it running and everything is sealed good.

Thanks, but it will not go to 0 to 29-30 I need a good one that is fast.

 

[Szyntax]

You can get Robinair vacuum pumps on Ebay

 

[zorg]

i was reading yesterday that robinair pumps instructions state.......

"replace the oil after each use"

that can't be right can it?!

-z

 

[sskunky]

I use an old Edwards speedy vac. It pulls a full vacuum in about 2 mins and I use a stainless steel tank about 2 foot deep and 2 foot wide. I got the whole lot off eBay for £200 which is a bargin for something of that size.
I've used it loads of times and never replaced the oil yet.

 

[zorg]

I use an old Edwards speedy vac. It pulls a full vacuum in about 2 mins and I use a stainless steel tank about 2 foot deep and 2 foot wide. I got the whole lot off eBay for £200 which is a bargin for something of that size.
I've used it loads of times and never replaced the oil yet.

Ive missed loads of bargains on ebay due to "pick up only" .living in the north of scotland really sucks sometimes............

 

[SUPERprops]

Ive missed loads of bargains on ebay due to "pick up only" .living in the north of scotland really sucks sometimes............

One time(i live in So-Cal) I saw a huge vacuum former with a built in heater for $350.00.... It was in Indiana with Pick up only:cry... oh well

 

[Mostly Fantasy]

I bought a Robinair pump years ago, and haven't changed the oil yet as it still looks clean. For the tank, I converted one of my 5 gal. pressure pots- it's big enough to hold a 5 gal. bucket, and pulls about 29 in. hg in 2 minutes. I leave the silicone degassing for about 5 minutes after it "falls"- never had a problem pressurizing molds after degassing.

 

[zorg]

For the tank, I converted one of my 5 gal. pressure pots

thats what i'm using, its a perfect solution in my mind, plus mine can still be used as a pressure pot, 2 birds with one stone


-z

 

[trooper]

im looking for one myself, will this one work?
U.S. General 98076 2.5 CFM Vacuum Pump | eBay
or does it need to be more powerful?
I have this on it's way, got SMOKIN deal on it

http://www.ebay.com/itm/250977065971?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
my plan is to add the vac pump to it so i dont need a second chamber. is there anything wrong with doing this?

 

[terryr]

I use the motors from old fridges. They'll pump down to 29, and they're free. Put the hose on the other end and it's a compressor. And it's very quiet. If it stops working get another.

 

[trooper]

and just happen to live next to a guy who owns his own fridge repair shop


thanks
jerry