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Old 10-07-2018, 07:36 PM
mtelkhntr mtelkhntr is offline
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Default N Frame possible crack

I looked at an N frame model 27 and it appeared to have either a deep scratch or a crack in the frame. Looking the revolver from the left side the mark runs from the upper left corner on the cylinder window, through the pin and ends at the front of the frame. The pin isnít marked but if it werenít in the frame this mark or whatever it is would go right through the center of the hole. Has anyone seen or heard of frames cracking in that area?
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Old 10-07-2018, 07:40 PM
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Is there any way you can post a pic or three of the area of concern?
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Old 10-07-2018, 07:46 PM
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I donít have the revolver just saw it. It and me are now 250 miles apart
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Old 10-07-2018, 07:49 PM
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That's not the thinnest part of the frame thread boss. Doesn't mean it might not crack there.

There is a commercial product usually found in welding supply stores called CrakChekr or something similar. You use brake cleaner or something similar to get the area chemically clean. You then, per directions, spray on the penetrating solution and wipe the surface clean. The developer is then sprayed on. If it's actually cracked, you'll see a contrasting color line where the crack is when the developer dries.

If the seller kvetches, there's any number of come backs. You'll be willing to buy the gun if it's intact. Hints that they wouldn't want their rep to suffer if they sold a non-repairable gun as functional might work too.

My version of the directions may be slightly off, but I've used the stuff on tractor spindles periodically after having one break on me. Been worth the cost. It's much easier and more convenient to change cracked but working spindles in a barn than wherever one breaks in the field while worrying about the tractor falling on me.

Last edited by WR Moore; 10-07-2018 at 07:56 PM.
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Old 10-07-2018, 08:14 PM
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What WR Moore is describing is called "dye penetrant testing". Weld inspectors do a lot of this type of testing. The kit typically comes with everything you need in spray cans...the cleaner, the penetrating dye, and the developer. Not an inexpensive proposition just to check one gun that you are considering buying.
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Old 10-07-2018, 10:44 PM
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I would be shocked if a 27 cracked like that. Shooting wouldn't do it. Maybe dropped...from an airplane...and run over by a bulldozer.
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Old 10-07-2018, 10:56 PM
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I would be shocked if a 27 cracked like that. Shooting wouldn't do it. Maybe dropped...from an airplane...and run over by a bulldozer.
Unless they shot too many +P rounds in it.
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Old 10-08-2018, 12:31 AM
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Unless they shot too many +P rounds in it.
Where have you seen, or even heard of, .357 MAGNUM +p?????
And no, that wouldn't do it. Except for the rare occurrence of cracks to the bottom of the frame lunette frames simply do not fail until the cylinder does first!
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Old 10-08-2018, 01:49 AM
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Quote:
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I would be shocked if a 27 cracked like that. Shooting wouldn't do it. Maybe dropped...from an airplane...and run over by a bulldozer.
Thatís my thought but I could catch it with me fingernail. Iíll see if theyíll magnaflux it or do the penetrating dye. Itíll be a while before I get back that direction
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Old 10-08-2018, 07:04 AM
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Where have you seen, or even heard of, .357 MAGNUM +p?????
Please note "wink" icon at end of my post.
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Old 10-08-2018, 09:19 AM
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Quote:
Originally Posted by G-Mac View Post
Not an inexpensive proposition just to check one gun that you are considering buying.
IIRC, the kit cost me about $20, which is cheaper than possibly buying a firearm with a cracked frame/receiver. I got a number of uses out of the kit before it lost pressure as all such canned pressurized products can do.

Thanks for the proper name for the process, it was late and I'm no longer young.

Mangaflux would work too, be less messy but the issue is finding someplace willing to do it on a gun plus getting it there and back. Dunno about costs.
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Old 10-08-2018, 09:31 AM
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Quote:
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IIRC, the kit cost me about $20, which is cheaper than possibly buying a firearm with a cracked frame/receiver. I got a number of uses out of the kit before it lost pressure as all such canned pressurized products can do.

Thanks for the proper name for the process, it was late and I'm no longer young.

Mangaflux would work too, be less messy but the issue is finding someplace willing to do it on a gun plus getting it there and back. Dunno about costs.

Here's some current prices on dye penetrant kits....

Amazon.com: dye penetrant kit
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