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When using a vacuum bag to form a holster how many HP do you use?


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I've been trying to use a 2 hp dry vac to form my holsters and I don't seem to be getting enough suction.  What power do you feel is sufficient?

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Posted
41 minutes ago, AzShooter said:

I've been trying to use a 2 hp dry vac to form my holsters and I don't seem to be getting enough suction.  What power do you feel is sufficient?

I think you would need a vacuum pump. Its not the same as a vacuum for cleaning i have this one it works well.

https://www.harborfreight.com/25-cfm-vacuum-pump-61245.html

Worked in a prison for 30 years if I aint shiny every time I comment its no big deal, I just don't wave pompoms.

“I won’t be wronged, I won’t be insulted, and I won’t be laid a hand on. I don’t do these things to other people, and I require the same from them.” THE DUKE!

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Posted

Ditto the HF vac pump. I use the same one.

Not so retired RN. Living on the Washington Peninsula.

 

 

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Me too . . . Harbor Freight sold me my vacuum pump . . . and it will collapse . . . and I mean COLLAPSE the leather on the mold . . . big time.

I think I tried the giant vac I have once . . . and it just did not do the job . . . so off to Harbor Freight I went.

I got this guy:  https://www.harborfreight.com/25-cfm-vacuum-pump-61245.html

May God bless,

Dwight

If you can breathe, . . . thank God.

If you can read, . . . thank a teacher.

If you are reading this in English, . . . thank a veteran.

www.dwightsgunleather.com

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I use the same pump for my cars' AC. It pulls 30 psi vacuum.

Machines: Mitsubishi DB-130 single needle, Kansai Special RX-9803/UTC coverstitch, Union Special 56300F chainstitch, Pfaff 335-17 cylinder arm walking foot, Bonis Type A fur machine, Huji 43-6 patcher, Singer 99 hand cranked, Juki DDL-553 single needle (for sale)

Posted
1 hour ago, DrmCa said:

It pulls 30 psi vacuum.

That would be 30" Hg (mercury) vacuum.  Atmospheric pressure is nominal 14.7 psia.  So you can't pull a vacuum exceeding that number.

Not that this makes any difference to what you are doing.  Just clarifying actual numbers. 

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Posted
5 hours ago, AzShooter said:

I've been trying to use a 2 hp dry vac to form my holsters and I don't seem to be getting enough suction.  What power do you feel is sufficient?

It's not a matter of horsepower but rather the type of pump the motor is driving.  Vacuum cleaners are designed to move a relatively large volume of air at a low level of suction using a centrifugal fan.  What you need is a vacuum pump, a pump designed, not to move air, but to pull a vacuum.   

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Posted
36 minutes ago, Northmount said:

That would be 30" Hg (mercury) vacuum.  Atmospheric pressure is nominal 14.7 psia.  So you can't pull a vacuum exceeding that number.

Not that this makes any difference to what you are doing.  Just clarifying actual numbers. 

 14.7 at sea level 

Worked in a prison for 30 years if I aint shiny every time I comment its no big deal, I just don't wave pompoms.

“I won’t be wronged, I won’t be insulted, and I won’t be laid a hand on. I don’t do these things to other people, and I require the same from them.” THE DUKE!

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Posted

Thanks for all the info.  Seems I need a new pump.

 

Posted
On 1/1/2022 at 4:09 AM, chuck123wapati said:

I think you would need a vacuum pump. Its not the same as a vacuum for cleaning i have this one it works well.

https://www.harborfreight.com/25-cfm-vacuum-pump-61245.html

I have that pump also, how do you handle the oil mist from the exhaust side of the pump?

On 1/1/2022 at 7:20 AM, Dwight said:

Me too . . . Harbor Freight sold me my vacuum pump . . . and it will collapse . . . and I mean COLLAPSE the leather on the mold . . . big time.

I think I tried the giant vac I have once . . . and it just did not do the job . . . so off to Harbor Freight I went.

I got this guy:  https://www.harborfreight.com/25-cfm-vacuum-pump-61245.html

May God bless,

Dwight

I'll ask you what I asked Chuck123Wapiti, how do you handle the oil mist from the exhaust side of the pump?

Jeff

So much leather...so little time.

 

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