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No gunsmithing here.....Removal of a stuck and stripped screw using TiG welding
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Picture of ted thorn
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This nitrogen valve typically has a small standing 3mm hex visible on top just proud of the center carbide jet pin. It needs cleaned from time to time but today it has froze up and won't come out.....to the point a process tech actually ruined the head and the micro socket can no longer get a bite.



Since we have a carbide center there is no drilling this out so I had a TiG trick to try before I would be forced into an EDM

40 amps and Brutis rod stacked up tall then weld out left and right into mid-air to for a "T" handle



Add a spritz of PB blaster and back it out.....pretty deep



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Posts: 7361 | Location: South East Missouri | Registered: 23 November 2005Reply With Quote
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that's pretty clever -- i've made an L handle and used that as my filler rod, then left if there to cool .. but the T is asweome


opinions vary band of bubbas and STC hunting Club

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I cheat on those Ted. I just drive in the next size up torx head with a hammer and turn em out. Necessity is the mother of invention.


When I was a kid. I had the stick. I had the rock. And I had the mud puddle. I am as adept with them today, as I was back then. Lets see today's kids say that about their IPods, IPads and XBoxes in 45 years!
Rod Henrickson
 
Posts: 2542 | Location: Edmonton, Alberta Canada | Registered: 05 June 2005Reply With Quote
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The nitrogen pin had a male hex not a female hex.....so you won't be driving anything into it

3mm male hex (nut).....when nice and un-phucked turns with a micro socket nicely

Stripped into a 3mm round shank with a 1.5mm carbide center pin creates a problem

I will note.....the center pin was unharmed by the weld and was re-used


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Posts: 7361 | Location: South East Missouri | Registered: 23 November 2005Reply With Quote
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AAHhhhhh gotcha. I guess you're probably lucky that you had a stub to weld to at all. The first thing that heavy handed millwrights feel they have to do is get a vise grip on everything. A .116 inch pin generally doesn't hang around long under that sort of temperament. LOL


When I was a kid. I had the stick. I had the rock. And I had the mud puddle. I am as adept with them today, as I was back then. Lets see today's kids say that about their IPods, IPads and XBoxes in 45 years!
Rod Henrickson
 
Posts: 2542 | Location: Edmonton, Alberta Canada | Registered: 05 June 2005Reply With Quote
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