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Old 01-01-2017, 04:54 PM
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Default Swapping Front Sight 586-8

I'm about to change the red ramp front sight to install a patridge sight. I was told by someone he thought the roll pin was made to go in and out only on one side. Is this true?
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Old 01-01-2017, 06:46 PM
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Standard practice is pins enter and are removed to/from the right. In actuality it makes no difference as S&W pins are straight, no taper.
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Old 01-02-2017, 02:35 PM
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What diameter punch and bit should this take?
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Old 01-08-2017, 03:00 PM
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The pins and hole are .055. A .05 punch works well. I use a 1/16 (.062) punch that I put in a cordless drill and ground it down to .05.
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Old 01-08-2017, 11:30 PM
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In fractions, what is a .055? So I can ask for one at the hardware store for a drill bit to drill the hole in the sight blade.
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Old 01-08-2017, 11:39 PM
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Nothing in fractions, it is a #54 AWG bit you need. A hardware store is not likely to have wire gauge drill bits.
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Old 01-09-2017, 09:22 AM
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The closest fraction w/o being too big is 3/64, which is almost .047 of an inch. Don't try to use anything soft, like wire as it will just bend.
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Old 01-10-2017, 08:01 PM
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Thanks guys for the info!
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Old 01-16-2017, 08:10 PM
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Fellas, would this be the same for my late 90's 640-1? I have tried everything I know but the pin won't budge either way.

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Old 01-16-2017, 08:54 PM
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All the sight pins that I've ever seen are the same size. If you have a 1/16 punch, nothing will move because the punch won't fit in the hole.
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Old 01-16-2017, 09:40 PM
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Thank you. One side is sticking out just a tad, but the pin won't even budge to get it flush! I've never had one frozen like this. Soaked it for a couple days too, no go. Would heating it with a hair dryer help? Or is just the exact punch the only answer?
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Old 01-17-2017, 07:47 AM
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Quote:
Originally Posted by Dave Baird View Post
Thank you. One side is sticking out just a tad, but the pin won't even budge to get it flush! I've never had one frozen like this. Soaked it for a couple days too, no go. Would heating it with a hair dryer help? Or is just the exact punch the only answer?
I seriously doubt a hair drier would be of any benefit. The proper size and type of punch, along with a proper surface for the revolver is the key. The reason the pin may be protruding from one side may be because the hole is a bit under size and that's as far as the factory could get it in. I'd try removing it from the other side and test the hole size with the proper size drill.
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Old 01-17-2017, 09:26 AM
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Thank you!
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Old 01-17-2017, 11:40 AM
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The 629-6 N frame revolvers use the same size roll pin too. I bought a package of 6 #54 bits ( from Amazon) and used one to push out the roll pin. Then another #54 bit to drill the hole in a replacement fiber optic sight.
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Old 01-17-2017, 06:35 PM
Dave Baird Dave Baird is offline
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What type of bits are they? None broke while hammering? Got to get me a few of those please!!!

Is this the bit? WESTWARD 2UFN9 Jobber Drill Bit, HSS, Black Oxide, #54 | eBay

Dave

Last edited by Dave Baird; 01-17-2017 at 08:38 PM.
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Old 01-18-2017, 12:17 PM
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Yes. Get 3 or 4, not just 1.
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Old 01-18-2017, 04:58 PM
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Will do! Thank you.
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