Calguns.net  

Home My iTrader Join the NRA Donate to CGSSA Sponsors CGN Google Search
CA Semiauto Ban(AW)ID Flowchart CA Handgun Ban ID Flowchart CA Shotgun Ban ID Flowchart
Go Back   Calguns.net > FIREARMS DISCUSSIONS > Curio & Relic/Black Powder
Register FAQ Members List Calendar Mark Forums Read

Curio & Relic/Black Powder Curio & Relics and Black Powder Firearms, Old School shooting fun!

Reply
 
Thread Tools Display Modes
  #1  
Old 02-15-2013, 9:17 AM
Spiggy's Avatar
Spiggy Spiggy is offline
Calguns Addict
 
Join Date: Mar 2006
Location: The Land of Irv
Posts: 8,717
iTrader: 26 / 100%
Default Garand Op Rod Piston head?

I'm trying to do some research on how these are normally assembled. I found a shop manual and ordered it.

As much as I'd like to use some sort of op-rod restoration service, the gun is in Europe and I'm trying to help a friend gather schematics so he can fab his own. That is unless he can find out it's legal to ship a bitty bit of metal to him.
__________________
Quote:
Originally Posted by AJAX22 View Post
Anti gun BS...

Finger print recognition is one more thing that keeps your killamajig from performing its killimafunction
Reply With Quote
  #2  
Old 02-15-2013, 9:19 AM
kurac's Avatar
kurac kurac is offline
Veteran Member
 
Join Date: Dec 2005
Location: N.DPRK
Posts: 2,530
iTrader: 17 / 100%
Default

they are normally brazed on I believe
Reply With Quote
  #3  
Old 02-15-2013, 9:43 AM
Garandimal's Avatar
Garandimal Garandimal is offline
Senior Member
 
Join Date: Sep 2011
Posts: 975
iTrader: 0 / 0%
Default

I got a SG Armory rebuild from the CMP that had a new Op-rod tip that looks like it was soldered on. Hope they used Silver solder.




GR
__________________
...Cogito, ergo armatum sum..."

(I think, therefore I am armed.)


-- Lt. Col. Dave Grossman --
Reply With Quote
  #4  
Old 02-15-2013, 12:19 PM
wilbur46 wilbur46 is offline
Junior Member
 
Join Date: Feb 2008
Location: N. Ca
Posts: 50
iTrader: 0 / 0%
Default op rod

They were silver-soldered on.
The real trick is to know if the rest of the rod is ok.
They are supposed to be "bent", but it has to be just right.
The pad,tab, and bearing track cannot be all chipped up either, but can be welded if necessary.
The gas cylinder must be honed clean and the the new piston turned and polished to fit with correct clearance. Silver solder is not hard to do, but it is hot!
Might be simpler to fins someone in Europe who knows whats up.
Regards, W
Reply With Quote
  #5  
Old 02-15-2013, 12:20 PM
Orlando Orlando is offline
Senior Member
 
Join Date: Sep 2010
Location: WLiberty Ohio
Posts: 1,365
iTrader: 7 / 100%
Default

plenty of Garand parts in Europe, buy a new one
Reply With Quote
  #6  
Old 02-16-2013, 8:34 AM
me109g4 me109g4 is offline
Senior Member
 
Join Date: Mar 2011
Location: Rindge NH
Posts: 619
iTrader: 0 / 0%
Default

ORIGINAL manufacture was to use a process called "butt" or "resistance" welding, a blank piston was put onto the rod then ground to size. When the piston wears out of tolerance the piston was usually built back up using chrome plating then turned down to dimension. It might be worth suggesting to your friend in europe to have the piston "flash chromed" since it doesnt take much to bring it back into tolerance,and its a quick inexpensive fix.

Total runout on the piston is only .0007" between go and no go, a little known fact is SA allowed a "working tolerance up to .5265" which gave a weak cylinder a little longer life span.

I used to manufacture replacement pistons and sold them to a few companies, and found when done correctly silver solder WILL do the job, but has to be done carefully, as getting the piston out of square with the rod has negative consequnces. JT
Reply With Quote
  #7  
Old 02-17-2013, 4:20 AM
finloq's Avatar
finloq finloq is offline
Senior Member
 
Join Date: Dec 2009
Location: SoCal
Posts: 523
iTrader: 0 / 0%
Default

Quote:
Originally Posted by Orlando View Post
plenty of Garand parts in Europe, buy a new one
Yep, that Danes and Greeks made tons of spare parts.
__________________
"Self-realization. I was thinking of the immortal words of Socrates, who said, "... I drank what?"
Reply With Quote
  #8  
Old 02-17-2013, 4:36 AM
Orlando Orlando is offline
Senior Member
 
Join Date: Sep 2010
Location: WLiberty Ohio
Posts: 1,365
iTrader: 7 / 100%
Default

There are alot of USGI Garand parts still in Europe
Reply With Quote
  #9  
Old 02-18-2013, 9:43 AM
Spiggy's Avatar
Spiggy Spiggy is offline
Calguns Addict
 
Join Date: Mar 2006
Location: The Land of Irv
Posts: 8,717
iTrader: 26 / 100%
Default

Quote:
Originally Posted by finloq View Post
Yep, that Danes and Greeks made tons of spare parts.
Quote:
Originally Posted by Orlando View Post
There are alot of USGI Garand parts still in Europe
Evidently, not the case. I got him the machinist's shop manual for now.
__________________
Quote:
Originally Posted by AJAX22 View Post
Anti gun BS...

Finger print recognition is one more thing that keeps your killamajig from performing its killimafunction
Reply With Quote
  #10  
Old 02-18-2013, 4:38 PM
pro-nra's Avatar
pro-nra pro-nra is offline
Senior Member
 
Join Date: Nov 2010
Location: Sacramento
Posts: 2,034
iTrader: 157 / 100%
Default

Unless he has a jig to check the bends, it is a waste of time as Orlando has mentioned there are still plenty of USGI left in Europe.

Quote:
Originally Posted by finloq View Post
Yep, that Danes and Greeks made tons of spare parts.
IIRC the Greek did not make "tons of parts" for the Garand. They did make simple "non critical parts" like the furniture and some metals for it. The Danes did make more parts like outstanding VAR barrel and a few other parts. Breda and Beretta made the most including an entire rifle.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -8. The time now is 7:41 AM.




Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Proudly hosted by GeoVario the Premier 2A host.
Calguns.net, the 'Calguns' name and all associated variants and logos are ® Trademark and © Copyright 2002-2016, Calguns.net an Incorporated Company All Rights Reserved.