Machine shop work

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armydan
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Machine shop work

Post by armydan » Thu Feb 23, 2017 7:05 pm

Im looking for recommendations for a machinist in the Louisville area. Ive got a Griffen minimalist mount in .223 with 1/2x28 threads. I want it re-threaded to 13.5x1LH and bored to 9mm for my MPX. Im doing a form 1 suppressor and the Griffen is the mount for quick atttach/take off. I dont really want to go direct thread and my other option is 3 lug mounting which will not allow me to use it on other rifles. And Griffen wont do custom threading at this time. Thanks.

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Re: Machine shop work

Post by shaggy1392 » Thu Feb 23, 2017 8:41 pm

Guncrank?

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Re: Machine shop work

Post by armydan » Thu Feb 23, 2017 9:28 pm

I don't know. Is that a person or a place?

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Re: Machine shop work

Post by samb. » Thu Feb 23, 2017 9:44 pm

I'm sure he could do it if you don't need it anytime in 2017. :llama:

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Re: Machine shop work

Post by Dave1965 » Thu Feb 23, 2017 10:06 pm

samb. wrote:I'm sure he could do it if you don't need it anytime in 2017. :llama:

later 2017/early 2018 no damn llama

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Re: Machine shop work

Post by richief » Fri Feb 24, 2017 12:25 am

I am not saying it won't work. I am saying it won't be perfect. Minor diameter for your metric thread is 12.5 mm, the half inch threads are allready at 12.7 mm. You will have about .008 oversize (8 thou) and .004 of threads showing in wall of bore, that are 28 tpi, your 1mm pitch is 25.4 threads per inch, there will be some worm crosshatching of threads, on a thread that will not peak but be flat topped. Also the threading would need to be singlepointed in a lathe, (imo) rather than use a tap, because with an oversize bore you will not get a concentric thread in that piece with a tap, except by pure luck, and also less than a full 75% thread engagement. This would be of concern on a supressor. Would an 1/2-28 female to 13.5-1 LH male adapter work for you? If so, I would go that route.
Last edited by richief on Fri Feb 24, 2017 1:16 am, edited 1 time in total.

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Re: Machine shop work

Post by richief » Fri Feb 24, 2017 12:44 am

I don't see one listed as stock inventory, but I am pretty sure theses guys can accomodate you and know exactly what you are wanting to do.
http://www.cncwarrior.com/category-s/1950.htm

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Re: Machine shop work

Post by Rem700 » Fri Feb 24, 2017 6:32 am

Guncrank is a member on here. He does smith work on the side and has for many other people on here. His shop is/was off Bardstown rd in Fern Creek. Maybe send him a PM and see if he can help you.

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Re: Machine shop work

Post by Rem700 » Fri Feb 24, 2017 6:33 am

Also maybe adayton on here. I don't know if he does this work or not but I know he has a full service machine shop called Stamler Machine. Might be worth an ask.

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Re: Machine shop work

Post by guncrank1 » Fri Feb 24, 2017 6:46 am

I do not turn metric threads , especially internal

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Re: Machine shop work

Post by armydan » Fri Feb 24, 2017 11:34 am

Thanks for the replies. I already have an adapter but i was wondering if maybe the flash hider could be rethreaded for a cleaner look. Thanks again.

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