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Old 06-07-2010, 10:34 PM   #1 (permalink)
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Stripped Field Strip Screw

I just purchase an RT valve from Jay2146, only to find the field strip screw hole stripped and part of the screw left down inside. Can this be repaired or is it just a paper wieght? I am talking to him about sending it back, but being he's a new member, and says it was pulled from a working marker, I may be stuck.
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Old 06-08-2010, 10:21 AM   #2 (permalink)
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you *might* be able to EDM the old screw out and just clean up the threads. It might require a longer screw if the threads are damaged quite deep. The nice thing is those holes are tapped pretty deep so you can use a longer screw in there.
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Old 06-08-2010, 11:20 AM   #3 (permalink)
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Can you not use a left handed drill bit and an easy out and then just heli-coil it? I know it's a fairly small screw but they make very small left handed bits and easy outs.
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Old 06-08-2010, 01:24 PM   #4 (permalink)
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You can get it out with EZ outs and clean the hole up with a tap. Like Dukie said, those holes are threaded very deep, so even if you lose half the threading the field strip screw still has plenty to catch on.

Oh, and he sent you something OBVIOUSLY busted. That doesn't get leeway. The guys a usps didn't open the box and break half a screw off in there for kicks. Ask him what his field strip screw looks like. I bet its shorter than normal.
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Old 06-08-2010, 02:16 PM   #5 (permalink)
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He's willing to work with me. I would just return it, but finding another Micromag RT valve seems near impossible. If I can fix this one, and not spend a fortune to do it, it might be worth it to me.
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Old 06-08-2010, 03:28 PM   #6 (permalink)
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Once you get the screw out, find a 10/32 bottoming tap to clean the threads up with. You probably won't find one at Home Depot, but your local fastenal should have one or be able to get one quickly. I got lucky and a local large machine shop makes taps of all shapes and sizes and keeps them in stock. I got mine for under five bucks. I've fleshed out two valves without a problem with it.
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Old 06-09-2010, 01:33 AM   #7 (permalink)
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Looking at it under magnification, it doesn't look like it's coming out in one piece.
I've decide just to send it back to him, not worth it to me.
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Last edited by avtech2; 06-09-2010 at 01:45 AM.
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Old 06-10-2010, 12:21 AM   #8 (permalink)
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did this to an xvalve sent it to agd they helicoiled it an it is awesome
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Old 06-10-2010, 08:32 PM   #9 (permalink)
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Quote:
Originally Posted by superman View Post
did this to an xvalve sent it to agd they helicoiled it an it is awesome
This is awesome to here. Worked out a deal that allows me to keep it, and now worth the gamble to attempt fixing it. The machinest at my work was thinking this would be an option, if just drilling and taping doesn't get it done. Glad to hear it's been done before.
How much did it cost for AGD to fix?
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Old 06-10-2010, 10:14 PM   #10 (permalink)
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the drilled a spot on the bottom of my valve like the old star system idk if they will charge you
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