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Posted: 5/26/2012 12:39:21 PM EDT
| I'm putting a fiber optic front sight on my Mossberg590. It replaces the factory bead but the threaded stud needs to be filed down about 1mm so that it doesn't protrude into the barrel. Anyone have any suggestions on how to file it down without buggering up the threads? I'm a little hesitant to put it on the bench grinder. |
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Quoted:
In your situation, I'd put some locktite on the threads, screw it into the barrel, then peen the end so it wouldn't back out. Then I'd Dremel it flat to the inside of the bbl. I do the same, but skip the peen (you are just gonna grind off anything you peen over anyway) A worn down,1/2" sanding drum on a Dremel works well. Use a light touch and don't grind excessively into the bore, just enough to cut down the bead's shaft. This will let the shaft's match the inner contour of the bore and not leave a portion of the threaded hole exposed to catch plastic fouling from the wad. |
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Quoted:
I would go to the belt sander real easy than bugger up the barrel trying to smooth to fit. That's just me. I would try to screw it into a small nut that it can still protrude from and use vice grip to clamp down on the nut to take it to a belt sander. This is the precise method I've used for years, but you'll never find a nut with similar threads for bead sights and such - you'll have to make one. I use a 6" long piece of steel barstock, with a threaded hole, tapped with the corresponding thread. Its easy to hold the sight for grinding that way. |
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Quoted:
Quoted:
I would go to the belt sander real easy than bugger up the barrel trying to smooth to fit. That's just me. I would try to screw it into a small nut that it can still protrude from and use vice grip to clamp down on the nut to take it to a belt sander. This is the precise method I've used for years, but you'll never find a nut with similar threads for bead sights and such - you'll have to make one. I use a 6" long piece of steel barstock, with a threaded hole, tapped with the corresponding thread. Its easy to hold the sight for grinding that way. I wondered about finding a nut with the right thread or having to tap a hole in a piece of steel to match the threading. Any other time I've needed to grind down a bolt/screw it's always been in something bigger to get a grip and then go to the belt sander. |
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Quoted: Quoted: In your situation, I'd put some locktite on the threads, screw it into the barrel, then peen the end so it wouldn't back out. Then I'd Dremel it flat to the inside of the bbl. I do the same, but skip the peen (you are just gonna grind off anything you peen over anyway) A worn down,1/2" sanding drum on a Dremel works well. Use a light touch and don't grind excessively into the bore, just enough to cut down the bead's shaft. This will let the shaft's match the inner contour of the bore and not leave a portion of the threaded hole exposed to catch plastic fouling from the wad. This makes me a little nervous but it sounds like it might be my best option. Thanks for the ideas and here goes nothing! |
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