[PSUBS-MAILIST] Electrical thru-hull

[Hugh Fulton via Personal_Submersibles]

Hi Bob,

You need a hand reamer but you also need a bit of experience to use them as they are easy to make marks in the bore.  Does the penetrator need to have a seal on the bore? Forget honing unless you have some knowledge on this as well.  Honing is for very small metal removal or for surface finish.  Very easy to get an hourglass effect or barreling.

What diameter and what length is the through hole?  Have you measured the amount it has shrunk.  What are you measuring with?

 

Hugh

 

 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of via Personal_Submersibles
Sent: Thursday, 9 October 2014 9:47 a.m.
To: personal_submersibles at psubs.org
Subject: [PSUBS-MAILIST] Electrical thru-hull

 


Fellow PSUBERS,

 

I haven't posted really anything in the past and I don't have a project page with photos (I will work on getting my project on the site this week!) but have a question for everyone out there.  I am building a K boat.  I have the structure about 95% complete.  When I welded in my Electrical Thru-hull, they must have shrunk just a touch.  The penetrator won't slide through the fitting that I made.  The machinist that made most of my parts said that it would be better to hone them out than to take any material off the penetrator.  So I bought a honing tool and after several hours working on the first one, I have made zero progress! Has anyone else encountered this in the past and does anyone have any ideas?  Am I making any sense?

 

Thanks!!

 

Bob



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