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Old October 13, 2017, 00:01   #1
Capt D
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REQUEST: Re-threading a cobalt muzzle device?

Okay, so I've got an OSS muzzle device, and it's made of cobalt. Currently, it is threaded 1/2-28...I need it re-threaded 9/16-24 (RH); OSS doesn't make one in that TP yet.

Now, it is a suppressor mount, so it pretty much needs to be perfect. What say you--anyone have the tooling for such an operation? Cobalt is an out-of-the-ordinary material, and it's quite hard... Just a thought. Anyone? TIA, all... --Art
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Old October 13, 2017, 08:38   #2
John A
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Yes, it can be done.

https://www.google.com/search?q=mach...ddress&ie=&oe=
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Old October 13, 2017, 18:48   #3
Capt D
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Sooo...anyone out there willing to take this on?
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Old October 13, 2017, 19:41   #4
SAFN49
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You may want to contact some machine shops that already work with cobalt. I would think the tooling would cost more than the re-threading operation.

Tool life is measured in minutes.

Cemented carbide inserts, especially fine-grained inserts, are suitable and broadly applicable along with SiAlON ceramics and, to some extent, whiskered ceramics.

http://www.americanmachinist.com/cut...g-super-alloys
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