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  #1  
Old 03-13-2018, 11:17 AM
becquette becquette is offline
 
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Default Garand cylinder inside diameter question

I have this cylinder purchased from a forum member on the forum for Garand parts.
My measurement shows the cylinder to be way past serviceablity
The forum member told me it was still serviceable because it did not fail his .532 pin gauge test.

Who is right?
What is the real measurement per USGI specs for inside diameter for a cylinder to no longer be serviceable?

Pictures of my measurements can be seen here.
https://imgur.com/a/vH5Jq
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Old 03-13-2018, 11:22 AM
Shomway Shomway is online now
 
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Can't tell, is it protruding out of the cylinder?
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Old 03-13-2018, 11:28 AM
Mr.Gadget Mr.Gadget is offline
 
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I have always use the pin gauge set I have.
Dont know if it is right or wrong.
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Old 03-13-2018, 11:28 AM
becquette becquette is offline
 
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It is way below the top of the cylinder.
It measures (drops into) .056 of an inch below the top of the cylinder

I added one more picture.

Last edited by becquette; 03-13-2018 at 11:57 AM.
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  #5  
Old 03-13-2018, 12:27 PM
Twinson Twinson is offline
 
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That picture you have is a fail. Out of spec gas cylinder. Jim
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Old 03-13-2018, 12:29 PM
Mike in NC Mike in NC is online now
 
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Unless your gas cylinder gauge is worn, I would say that gas cylinder is not serviceable. It might function with a op rod that has a piston that measures near the upper limit on diameter. I don't want to start an argument about whether is better to use a USGI or commercial version of a gas cylinder gauge or pin gauges, I really don't know. If my USGI gas cylinder gauge gave me a reading like the one in your pictures, I wouldn't use it for my build nor would I sell it as serviceable, just my opinion.
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Old 03-13-2018, 12:29 PM
me109g4 me109g4 is offline
 
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If that is a usgi gauge that cylinder is beyond toast. The shoulder is supposed to fit flush or above the top of the cylinder. using pins gauges is not the way to go, that's why there is a gauge.
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Old 03-13-2018, 12:31 PM
becquette becquette is offline
 
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I measured my USGI gauge and I get .531 maximum for the diameter.
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Old 03-13-2018, 12:40 PM
Mr.Gadget Mr.Gadget is offline
 
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Quote:
Originally Posted by becquette View Post
I measured my USGI gauge and I get .531 maximum for the diameter.
And that may be the reason when he checked with a pin it was good.
Any chance you can get a pin? If so and it passes the pin the original tester was wrong.
If it will not then he was correct based on his pins and info he gave.

Any way you look at it if out of spec then you are due a replacement or refund.

There are several different pins out there. He could have used a 532 + or just the 532 and not the - gauge.
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Last edited by Mr.Gadget; 03-13-2018 at 12:45 PM.
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  #10  
Old 03-13-2018, 01:22 PM
highpowerbbrad highpowerbbrad is offline
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The ordinance gauge is .530+ is fail, the pin sets I have seen are .532+ is fail. If it passed the .532 it is still serviceable. Have you tried shooting it?

Last edited by highpowerbbrad; 03-13-2018 at 01:33 PM.
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