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 Slayfan21
Stage 1 Brass Rat
Team Member
Joined: Oct 2009  KY, USA
 Posts: 3052 Feedback: 100% (55) |
Posted: 8/4/2012 7:21:59 PM
THE IMAGE ABOVE IS A PAID ADVERTISEMENT 
cant time the thing for nothing YHM 556 brake, Noveske 10.5 barrel Bought a shim kit meh, I need like .014 worth of shim, I have tryed .012, .015 .016 all fail, so I said hell with it and stoned a .001 off the brakes flange, its at 11:50 now 
might go another .0005 or so guesstimating and re fitting often |
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Posted: 8/4/2012 8:46:29 PM
Have you considered a crush washer?
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Nick710
Old Guy
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Joined: Feb 2002 OK, USA
 
Posts: 2190 Feedback: 100% (2) Link To This Post |
Posted: 8/4/2012 8:53:13 PM
Originally Posted By RPM509:
Have you considered a crush washer? This, it takes me about 87 seconds to time one with the crush washer. |
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Posted: 8/4/2012 8:58:47 PM
I don't think you're supposed to use a crush washer for a suppressor mount brake. May crush uneven and cause baffle strikes.
FWIW, you could always have a decent machinist make you a shim to your needed dimensions. |
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TomCat0197
Member
Team Member
Joined: Aug 2006 TX, USA
Posts: 805 Feedback: 100% (4) Link To This Post |
Posted: 8/5/2012 1:49:15 AM
Originally Posted By CTran555:
I don't think you're supposed to use a crush washer for a suppressor mount brake. May crush uneven and cause baffle strikes. This. Most if not all manufacturers state not to use crush washers on their mounts. |
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JohnStoner
Suppress everything.
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Joined: Feb 2007 NV, USA
Posts: 2446 Feedback: 100% (21) Link To This Post |
Posted: 8/5/2012 2:00:15 AM
[Last Edit: 8/5/2012 2:03:05 AM by JohnStoner]
Crush washers don't crush evenly putting your mount off center (concentric to bore is very important, from your measurements I'd say you already know that). Once you figure in tolerance stacking at best you will experience POI shift, at worst end cap or baffle strikes. As others stated - this voids many manufacturers warranties.
Shims and peel washers are your options. How many foot pounds of pressure are you exerting to mount the brake? Some manufacturers suggest rocksett and 30 pounds of pressure, but allow for up to 60 pounds depending on barrel type & manufacturer spec. It's possible you aren't near the max allowable and could get a little extra to time, or a little less with rocksett. |
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Posted: 8/5/2012 4:10:00 AM
[Last Edit: 8/5/2012 4:10:36 AM by aztroop]
I used the supplied peel washer. I had to take one off and it clocked properly. YHM does not recommend the use of rockesett. At least they did not mention it to me when I asked them. But it looks like you got your issue solved.
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Posted: 8/5/2012 12:10:00 PM
[quote]Originally Posted By CTran555:
I don't think you're supposed to use a crush washer for a suppressor mount brake. May crush uneven and cause baffle strikes. FWIW, you could always have a decent machinist make you a shim to your needed This, no crash washers |
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TeeRex
Aspiring Stamp Collector
Team Member
Joined: Oct 2009 OH, USA
Posts: 6905 Feedback: 100% (2) Link To This Post |
Posted: 8/5/2012 12:16:19 PM
I don't mind doing it with the peel washers they supply. I had a hell of a time timing my 7.62 brake though. The YHM brakes don't give you much area to work with the wrench, and the shims they sent me were too wide.
I end up putting some heat to the peel washers and they come apart easily. |
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Posted: 8/5/2012 2:21:07 PM
[Last Edit: 8/5/2012 2:28:02 PM by aztroop]
Originally Posted By TeeRex:
I end up putting some heat to the peel washers and they come apart easily. ^^+1. I tired seperating them by razor. Ended up doing the heat methond to melt the laminate holding them together. Reply I received from YHM YHM.net Sir, The YHM-5M2QD's use the peel washer included with them. Our QD Flash Hiders DO NOT use any washer. You have a Muzzle Brake, so use the included washer. Simply install the washer. Screw the muzzle brake on BY HAND ONLY till it contacts the washer. Then put a wrench on the wrench flats and turn the mount to the desired position, so the flat spot is at the 6 o'clock position and you are done. There is no torqueing or overtightening of the mount needed. edit to add info |
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Slayfan21
Stage 1 Brass Rat
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Joined: Oct 2009 KY, USA
Posts: 3057 Feedback: 100% (55) Link To This Post |
Posted: 8/5/2012 4:11:24 PM
all good info here, so are you saying they sent a peel washer with the brake?
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TeeRex
Aspiring Stamp Collector
Team Member
Joined: Oct 2009 OH, USA
Posts: 6910 Feedback: 100% (2) Link To This Post |
Posted: 8/5/2012 4:24:34 PM
The 5.56 brake should be a peel washer. When I got mine I had no idea wtf it was, so I came here, found the info, and got some tips about putting the heat to it.
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Slayfan21
Stage 1 Brass Rat
Team Member
Joined: Oct 2009 KY, USA
Posts: 3058 Feedback: 100% (55) Link To This Post |
Posted: 8/5/2012 4:28:43 PM
Originally Posted By TeeRex:
The 5.56 brake should be a peel washer. When I got mine I had no idea wtf it was, so I came here, found the info, and got some tips about putting the heat to it. how thick are the layers in the peel washer? |
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TeeRex
Aspiring Stamp Collector
Team Member
Joined: Oct 2009 OH, USA
Posts: 6912 Feedback: 100% (2) Link To This Post |
Posted: 8/5/2012 4:34:00 PM
I didn't measure it with calipers, but each layer itself is quite thin.
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Slayfan21
Stage 1 Brass Rat
Team Member
Joined: Oct 2009 KY, USA
Posts: 3059 Feedback: 100% (55) Link To This Post |
Posted: 8/5/2012 4:38:04 PM
Well I might redo it some day before I get my form 4 back, but for the time i think i will just leave it shimmed at like 11:55
Thanks tho |
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Posted: 8/5/2012 4:58:27 PM
My gunshop installs them FOR FREE in 5 mins!!!
~WTS |
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Posted: 8/5/2012 6:19:22 PM
Originally Posted By RPM509:
Have you considered a crush washer? Never ever use a crush washer when mounting a suppressor mount –– unless you want to guarantee misalignment and expensive damage to a suppressor, some of which cannot be repaired. |
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LMTRocks
Minister of Propaganda
Team Member
Joined: Nov 2008 USA
Posts: 2531 Feedback: 100% (53) Link To This Post |
Posted: 8/6/2012 1:26:04 AM
I might have a shim kit to make it work when you come into get the F4...
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Posted: 8/6/2012 3:36:57 AM
This is why we went with a two part design for our BoreLock series muzzle brake.
Regards! Tuukka Jokinen Ase Utra sound suppressors |
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