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What aluminum does Crosman use...

February 6 2011 at 10:59 AM
  (Login Duane30)
Crosman Forum Member
from IP address 98.223.200.6

...in the making of their valve components, if one knows? I suspect it is maybe 6061T4, maybe? However, 6061 is supposed to be more resistant to oxidation so quickly.

I ask because it seems that the valves simply do not hold up over [short] time in regards to internal degradation. For example, while resealing my little 1377 carbine for sake of resealing it, the valve has gone to absolute crud inside. Cleaned it all up, of course. The threads on the front valve half have even become victim of the awful degradation. I use the oils advised from Mac1, nothing has ever seemed to prevent it.

Now, my 392, which has an aluminum front half, brass back, doesn't seem to be nearly as bad. More discolration than anything else.

"Well, I thought it was a rabbit but it turned out to be Bear Grylls in a rabbit hide."

[linked image]

 
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Ratite
(Login ratite)
Crosman Forum Member
216.221.98.137

We have been using this for more then

February 6 2011, 12:16 PM 

3 years and is 100% Aluminum safe with aluminum protectants added


agoil.JPG


 
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(Login spysir)
Crosman Forum Member
12.107.247.101

I am not able to read the label

February 6 2011, 3:27 PM 

what is the product?
TIA
John

[linked image]

 
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(Login Duane30)
Crosman Forum Member
98.223.200.6

Hold "ctrl" and press "+" to zoom on the picture. N.T.

February 6 2011, 4:52 PM 



"Well, I thought it was a rabbit but it turned out to be Bear Grylls in a rabbit hide."

[linked image]

 
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(Login spysir)
Crosman Forum Member
12.107.247.205

new trick learned, thank you! (NT)

February 6 2011, 5:36 PM 

John

[linked image]

 
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Ratite
(Login ratite)
Crosman Forum Member
216.221.98.137

That oil

February 6 2011, 7:26 PM 

Is custom mix at the factory.
We told them what was needed and what it was going to be used for and the different rubber, plastic, and metals that were used.

I may have a few more samples left it you would like to try it let me know

I will say for now this is NOT to be used on Crosmans new Benjamin Rogue
until we know what kind of plastic is used in the stock


http://www.airgunsmith.com/gunlube/airgun_lube.htm





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This message has been edited by ratite from IP address 216.221.98.137 on Feb 6, 2011 7:46 PM
This message has been edited by ratite from IP address 216.221.98.137 on Feb 6, 2011 7:45 PM


 
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CO222
(Login CO222)
Crosman Forum Member
118.148.234.21

Could be

February 8 2011, 9:59 PM 

dissimilar metal corrosion (galvanic).

I once tried to make 6061 exhaust valve spring for my all stainless PCP. It was hand pumped
so possibly the air was a bit moist and within days it was full of white oxide.

Alu is more reactive than steel, copper and zinc so it'll go quickly under the right
conditions. Normally its passivation layer protects it, but the hot, moist, high pressure
of the gun's insides can be considered adverse conditions.

 
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