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 Post subject: Cheap vacuum setup
PostPosted: Sat Aug 31, 2013 6:47 pm 
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I'm looking to do a cheap vacuum setup because I plan on making only a few boards this winter at a borrowed workshop. I live in an apartment right now so I can't justify expensive equipment yet.

The best I can come up with is this venturi vacuum pump from Harbor Freight ($15): http://www.harborfreight.com/air-vacuum ... 96677.html

I already have a compressor that I can use with this.

Wondering if anyone has experience with this pump.

I was thinking about using it in conjunction with a 5 gallon tank that I already have, similar to: http://www.northerntool.com/shop/tools/ ... 7AodfXcAhw

Any worries of the thing imploding at 28" of vacuum?


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 Post subject: Re: Cheap vacuum setup
PostPosted: Sat Aug 31, 2013 8:41 pm 
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Location: The Naki
Using fridge compressor as a vacuum pump is a tried and true method!.

You can usually get a free fridge compressor.


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 Post subject: Re: Cheap vacuum setup
PostPosted: Sat Aug 31, 2013 9:07 pm 
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Very nice, like the propane tank reservoir.

All I really need is the venturi device and the assurance that my 5 gallon tank won't crumple.


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 Post subject: Re: Cheap vacuum setup
PostPosted: Tue Sep 03, 2013 10:16 am 
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UnbelievablyRed wrote:
Very nice, like the propane tank reservoir.

All I really need is the venturi device and the assurance that my 5 gallon tank won't crumple.


suck it and see!!!... I doubt your ventury device will have enough suck to implode your cylinder.


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 Post subject: Re: Cheap vacuum setup
PostPosted: Wed Sep 04, 2013 7:35 am 
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UnbelievablyRed wrote:
...
The best I can come up with is this venturi vacuum pump from Harbor Freight ($15): http://www.harborfreight.com/air-vacuum ... 96677.html
...


That's a really REALLY DUMB idea ; go back & read what --plummet-- had to say !!!

What can be cheaper than FREE ? My frig-vac was Free ; found it next
to a Dumpster, & it's ran for 20 years now !

Bille


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 Post subject: Re: Cheap vacuum setup
PostPosted: Wed Sep 04, 2013 8:23 am 
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Location: The Naki
Bille wrote:
UnbelievablyRed wrote:
...
The best I can come up with is this venturi vacuum pump from Harbor Freight ($15): http://www.harborfreight.com/air-vacuum ... 96677.html
...


That's a really REALLY DUMB idea ; go back & read what --plummet-- had to say !!!

What can be cheaper than FREE ? My frig-vac was Free ; found it next
to a Dumpster, & it's ran for 20 years now !

Bille



Hehehe some times you are brutal Bille. But I like it. 20 years life from a free fridge motor! now that is value for money. How many vac jobs have you done in 20 years? tell me yourve mate


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 Post subject: Re: Cheap vacuum setup
PostPosted: Wed Sep 04, 2013 8:47 am 
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Location: Lantau, Hong Kong
Something in the order of the first 300 boards made by Decay Kiteboards used a compressor extracted from a freezer my father had scrapped due to damaged feon pipes.

It was replaced with a commercial vacuum pump when I decided a 'proper' pump had to be better.

It wasn't.

The freezer compressor ran clean and quiet, the vacuum pump was noisy - making it hard to detect vacuum leaks and exhausted oil vapor into the workshop - pretty much the last thing you need in a place where you want stuff to bond.

A very short time after that we went away from vacuum altogether and built a press. I took great pleasure in dumping that commercial pump in the bin.

Even after all my experience with other systems - there is nothing that beats the cost/performance ratio of the humble free fridge compressor.

Cheers

DK


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 Post subject: Re: Cheap vacuum setup
PostPosted: Wed Sep 04, 2013 11:26 am 
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decay wrote:
Something in the order of the first 300 boards made by Decay Kiteboards used a compressor extracted from a freezer my father had scrapped due to damaged feon pipes.

It was replaced with a commercial vacuum pump when I decided a 'proper' pump had to be better.

It wasn't.

The freezer compressor ran clean and quiet, the vacuum pump was noisy - making it hard to detect vacuum leaks and exhausted oil vapor into the workshop - pretty much the last thing you need in a place where you want stuff to bond.

A very short time after that we went away from vacuum altogether and built a press. I took great pleasure in dumping that commercial pump in the bin.

Even after all my experience with other systems - there is nothing that beats the cost/performance ratio of the humble free fridge compressor.

Cheers

DK


300 boards! Nice. I must admit all of my wood core lay ups are with a mechanical press. You dont need to worry about the vacum failing. Sometimes with an additional vac bagging at the same time.


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 Post subject: Re: Cheap vacuum setup
PostPosted: Wed Sep 04, 2013 11:26 am 
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Joined: Sat Aug 29, 2009 11:25 pm
Posts: 2151
Location: The Naki
decay wrote:
Something in the order of the first 300 boards made by Decay Kiteboards used a compressor extracted from a freezer my father had scrapped due to damaged feon pipes.

It was replaced with a commercial vacuum pump when I decided a 'proper' pump had to be better.

It wasn't.

The freezer compressor ran clean and quiet, the vacuum pump was noisy - making it hard to detect vacuum leaks and exhausted oil vapor into the workshop - pretty much the last thing you need in a place where you want stuff to bond.

A very short time after that we went away from vacuum altogether and built a press. I took great pleasure in dumping that commercial pump in the bin.

Even after all my experience with other systems - there is nothing that beats the cost/performance ratio of the humble free fridge compressor.

Cheers

DK


300 boards! Nice. I must admit all of my wood core lay ups are with a mechanical press. You dont need to worry about the vacum failing. Sometimes with an additional vac bagging at the same time.


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 Post subject: Re: Cheap vacuum setup
PostPosted: Thu Sep 05, 2013 4:43 am 
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Joined: Mon Jul 01, 2013 7:16 am
Posts: 167
Super quiet. Air filter, vacuum advance on left side. Added a micro switch with manual pressure control. Added a timer to run every 5min for 30 secs.

Image

Image

No compressor + venturi can beat a cost of running this.

I was told that old fridges grow by the roads:)


Last edited by downunder on Thu Sep 05, 2013 6:37 am, edited 1 time in total.

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