[PSUBS-MAILIST] o-ring groove

[hank pronk via Personal_Submersibles]

Brian,Agreed, I was surprised at the lee way, I tend to go to the tight end of the tolerance, because they only turn a bit and slowly.You should go visit your daughter, then come up for a dive dayHank 


     On Wednesday, August 12, 2015 7:01 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
   

 There is a fair amount of fudging involved with those o rings.  You should obviously strive to get everything as close as possible to the specs, but when you look at the tolerances with respect to the squeeze there is a certain amount of lee way.   The smaller width of the o ring itself the less fudging you can do. brian  

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] o-ring groove
Date: Wed, 12 Aug 2015 23:33:13 +0000 (UTC)

Brian,Off hand I don't remember the dimensions, but I am going with .125 o-rings.  I use an o-ring groove guide to determine the groove size.When I made the groove in my Q ball I made a boring tool and ground the carbide to the exact size and just sank it in, but the Q ball is very soft.Hank 


     On Wednesday, August 12, 2015 4:27 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
   

 You can do it like you suggest, in fact that is how it is usually done, I believe.  What are the dimensions of the groove you need? Brian 

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: [PSUBS-MAILIST] o-ring groove
Date: Wed, 12 Aug 2015 22:16:12 +0000 (UTC)

Brian,Did you sort out the boring bar for cutting inside o-ring grooves?   I need to do the same and could use some advice, I was going to make a boring bar cutter with a very narrow cutter, narrower than the required groove and do multiple cuts.  I tried to make a groove cutter that was the full groove width but it was to much.   Hank_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
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