Pic's of Hardening of Oprod/M1

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Clancy

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Gentlemen,
These two photo's are VERY IMPORTANT for the operation of the Oprod on the M1 Garand Rifle. Again sorry about the photo's as they are almost not there on the old microfilm. The Hardening of the oprod at the piston is important as you can see in photo 1. However, in photo 2 the hardening of the Guide Lug is also VERY important. Under the photo is the following on the Guide Lug.
NOT Hardened on number 1 FAILED at 1200 rounds.
Hardened on number 2 photo sill ok AFTER 12,000 rounds.
That gives the hardened Guide Lug a 10 to 1 improvement.

hardandaa.jpg


oprod2ah.jpg


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Warning, before you go to my sites lower your volume as the opening page contains a sound file which has a loading and firing of the M1 Garand.

Gentlemen you know what to do. Push just a little more TIA. Gentlemen your doing a GREAT JOB.

Thanks again
Clancy

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Neat, never seen Induction hardening done execpt on some really big or long parts. But because they are induction hardening it I can tell you that the Oprod is made out of some sort of Carbon/tool steel which can be hardened. :)

Makes sense it will go bad quicker, since the reciver is hardened and will act sort of like a file on the Oprod and will wear it out. :)

Dimitri
 
Induction hardening is cool. Sorta like magic watching the part slide through the coils and instantly go to bright red heat. On shafts you generally just get a case hardening, depth depending on heat and quench, but very cool and useful none the less.
 
.040 to .060 isnt too bad especially since they just want to make it ware down less not really grind after hardening etc I'd assume. :)

Thanks Cocked&Locked didnt know that. Dont learn much about hardening at college really just basic stuff. :(

Dimitri
 
Guys,
The most important file is in the area of the Guide Lug. They are saying it will FAIL at 1200 rounds unless treated. I guess that part of these files does not seem to be as important as I thought it should be.
Sorry
Clancy
ps just going to lay off on posts
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Last edited:
No Clancy they are important. I just wondered off and thought about the heat treatment method. :)

The reason the op-rod failed at 1200 rounds is because the hardened reciver acts like a file on the op-rod guide lug and wear it down to the point it cannot do its job anymore sort of like what I said before. :)

Dimitri
 
Gentlemen,
I just read about a guy having a loose piston and he is taking it to a shop to have it fixed. I wonder if they would have it hardered ?
Thanks again
Clancy
 
The piston may or maynot be hardened, a good rule of thumb for anything really is if it moves and rubs harden it as it will last longer, now for a piston on a rifle it maynot be because the tube the gas piston is in might not be hardened to save a few bucks. :)

But my bet would be its hardened and it just wore down after 5 decades of use. :)

Dimitri
 
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