Torque specs for sbr

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powertrip222
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Torque specs for sbr

Post by powertrip222 » 14 Sep 2008, 16:03

Does anyone have or know the torque specifications for the barrel nut when you sbr a PS90. I remembered it being posted before the website problem. Any info would be greatly appreciated. :?:

Wollychop
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Re: Torque specs for sbr

Post by Wollychop » 14 Sep 2008, 16:04

35 lbs if I remember correctly.

powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 14 Sep 2008, 16:06

Thanks for the quick response WOOLYCHOP!!! :D

Wollychop
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Re: Torque specs for sbr

Post by Wollychop » 14 Sep 2008, 16:08

No worries! Its down the page here http://www.57forum.com/viewtopic.php?f=17&t=12" onclick="window.open(this.href);return false;

It says 30-35. When I did mine I'm pretty sure I just went 35. That was a while ago though.

powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 14 Sep 2008, 16:10

WOLLYCHOP I apologize for misspelling your name, I'm not very proficeint at typing.

powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 14 Sep 2008, 16:13

Thanks for all the info I'm seriously considering sbring my PS 90 and I was trying to compile all the info about doing it my self or having it done professionally.

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jmz5
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Re: Torque specs for sbr

Post by jmz5 » 14 Sep 2008, 16:15

It's a simple conversion, if you are mechanically inclined.
كاف

powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 14 Sep 2008, 16:25

I'm fairly decent with tools, but I have'nt got up the gumption to do it just yet. In other words I don't trust myself to work on one of my favorite firearms.

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jmz5
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Re: Torque specs for sbr

Post by jmz5 » 14 Sep 2008, 16:36

Its cake, just remember its lefty tighty with the ps90. Just make sure to keep the springs captive.
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powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 14 Sep 2008, 16:55

Thanks jmz5, if I remember right I think you can use a wooden dowel to push the old barrel out and that should keep the springs captive. Maybe with enough info and support from you guys , I might build up my confidence and try the conversion this fall. :thumb:

tejohnson
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Re: Torque specs for sbr

Post by tejohnson » 14 Sep 2008, 17:29

Might want to get started on the paperwork now so you may have the ability to get it done by winter ;)

powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 14 Sep 2008, 18:10

I have all the required forms filled out, just need to convince the spouse to approve the funds for the tax stamp. :skep:

tejohnson
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Re: Torque specs for sbr

Post by tejohnson » 14 Sep 2008, 18:29

Aw, that is too easy. How about trying multiple choice* with her:

a) Approval of a payment for a new 5.7
b) Approval of a payment for the tax stamp

* Disclaimer: Resorting to the presentation of the above may be hazardous to your health or love life. Always exercise caution at the presentation of any ultimatum to your spouse and consult with your doctor to ensure you are mentally healthy enough to live with a significant reduction in...

powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 15 Sep 2008, 12:58

More like how many honey-do jobs I can get done before really cold weather and whether or she is satisfied with the end results. :ponder:

Zhurdan
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Re: Torque specs for sbr

Post by Zhurdan » 15 Sep 2008, 13:27

The hardest part of the process was drilling out the blind pin for me. Everything else was just staying focused on where the springs go. Keeping them captured was a great notion... lets just say I didn't do it right. Either way, it's not all that hard to get them back together again, just takes some time.

Make sure to grind down your 15mm wrench to fit the slot on the chamber end of the barrel, and yes, it has to be a 15mm not a standard, you'll strip it out pretty quick if you don't use a 15mm. A good barrel vise is suggested, but it can be done with a good sized piece of leather as well, probably won't be able to reuse the barrel sleeve if you do it with leather, but I ain't planning on going back to 16".

One other thing, make sure when you do it, that you DO NOT turn the chamber side against the aluminum block on the front end, capture it with a wrench, you will destroy your rifle if you do not capture the front end with a wrench, use a wrench held in a vise.

(Man I shoulda taken pictures of the process, but I'm sure there's some out there somewhere)

Zhur

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f3rr37
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Re: Torque specs for sbr

Post by f3rr37 » 15 Sep 2008, 13:29

http://57forum.com/viewtopic.php?f=17&t=12" onclick="window.open(this.href);return false;

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jmz5
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Re: Torque specs for sbr

Post by jmz5 » 15 Sep 2008, 13:38

I just cut the barrel off with a dremel, and eventually sold it to someone on the forum.
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powertrip222
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Re: Torque specs for sbr

Post by powertrip222 » 15 Sep 2008, 19:09

Thanks guys, you are a wealth of information, I'm getting more and more anxious about going the sbr route!!! :drool:

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jmz5
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Re: Torque specs for sbr

Post by jmz5 » 15 Sep 2008, 19:19

Get the forms sent out and this is only a few weeks away. :D

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كاف

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jmz5
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Re: Torque specs for sbr

Post by jmz5 » 15 Sep 2008, 19:22

The main thing is not to put any pressure on the reciever it's self, it's made from aluminum and you could easily damage it byputting the torque on the reciever rather than the barrel.
كاف

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