[PSUBS-MAILIST] thru hulls

[hank pronk via Personal_Submersibles]

It must be doable because Gamma has it.  I made a cutter for my cue ball for 1/8 with a 5/8 bore.  I may be wrong but it seems to me that a bigger cross section o ring will have more surface contact on the rod, making it seal better especially if all is not perfect.  Can you not buy an appropriate cutter?  I usually make them by grinding a regular gutter down.  Maybe a pro machinist could comment.
Hank   --------------------------------------------
On Tue, 3/17/15, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] thru hulls
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Tuesday, March 17, 2015, 6:34 PM
 
 Hank,
        That is an incredibly deep
 groove, and I don't see the reason for it.  I was
 considering going with that size but getting a grooving tool
 to go .125 thousandths is a long way to go, especially in a
 1/2" hole !
 
 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] thru hulls
 Date: Tue, 17 Mar 2015 13:26:57 -0700
 
 Brian,
 Gamma has 1/8 orings, I would go with 1/8 might be more
 forgiveness.
 Hank 
 --------------------------------------------
 On Tue, 3/17/15, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
  Subject: [PSUBS-MAILIST] thru hulls
  To: "PSubs" <personal_submersibles at psubs.org>
  Received: Tuesday, March 17, 2015, 3:31 PM
  
  Hi
  All,             
  Starting in on thru hull production.  I will need
  probably close to a dozen of them.  I'm making them
  all to accept a 1/2" stainless shaft, and I will be
  using 1/16"  O rings.  I don't see any
  need to use thicker diameter O
  rings ,  since the deeper O ring grooves
  can be a bit more problematic.   By the time my
  welder finishes all the remaining critical welds I should
  have my thru hulls done.   Also working on my
  forward hard ballast tank, approx. 18" in dia X 5'
  long
  .  Cheers, Brian 
    
  
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