Grizzly Pressure pot on sale

[toyotaman]

I was looking at Grizzlys paint pressure pot. H6330 is the item #. It's on sale for 59.99. Is this worth buying?
Donny

 

[toyotaman]

I was looking at it so I could do some worthless wood casting for pressurizing blanks.
Donny

 

[woodgraver]

The maximum pressure on this unit is 50 psi. I have a HF one that has a maximum pressure of 60 psi. Talking to others, there can be a need for at least 70 psi. I'm searching for one that can go to 100 psi, it will definately cost more than $59, but in the long run I bet you will be happier with a model that gives you more flexibility.

Jim

 

[toyotaman]

Is there really a need for that much pressure? I've never used one of these before but it would seem like 30-40lbs of pressure would work. You are just using the pressure to push the PR into the cracks of the waste wood and to remove air bubbles right?

 

[hunter-27]

It partly is dependent on exactly what you are casting and exactly what resin you are using. 30-40 is plenty for some things, while others say 60-70 is better for other things. "typically" it seems alumilite is better for what you are describing but some have made PR work just fine in that aspect so a quick venture to the forum library will get you way educated with a lot of available info.

 

[woodgraver]

I posted in this section about my problems with small bubbles forming when I cast cholla cactus using alumilite and the recommendation was 70 psi to fix my casting woes. I'm just saying even a used lower end Binks paint pot (80 psi working pressure) might be a better investment that this "deal".

 

[DMGill]

I just bought a Shop Fox with max psi of 80 from Amazon for $86.41 and free shipping.

 

[sbell111]

I posted in this section about my problems with small bubbles forming when I cast cholla cactus using alumilite and the recommendation was 70 psi to fix my casting woes. I'm just saying even a used lower end Binks paint pot (80 psi working pressure) might be a better investment that this "deal".

70 is way more than you need for that. I cast cholla at about 40 pounds with absolutely no bubbles.

It should be noted that bubbles are going to collapse at a certain pressure regardless of the object being casted.

 

[Jim Burr]

Donny, you may want to go the other way and use vacuum. -30 cmh2o, or PSI?...I think it was Curtis that did the test, but again, I could be way off! Anyway...vacuum did a better job of moving material at a reasonable pressure than trying to smash it. The pressure pot will have more applications though.