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RE: Thru hull device
I'll see what I can do, but my non-committed time is limited so be
patient. I can put something on Autocad (DXF format) and attach it if
that is readable by your machines software. Let me know. I am in class
till Monday and generally swamped but sometime next week should be able
to sketch something. Another possibility is MS paint.
R. D. Morrisson
> ----------
> From: Scott Shakespeare[SMTP:shakey10@hotmail.com]
> Reply To: personal_submersibles@psubs.org
> Sent: Tuesday, June 16, 1998 5:18 PM
> To: personal_submersibles@psubs.org
> Subject: Thru hull device
>
> >I would recommend a simple double o-ring seal surrounding a ball type
> >thrust bearing and two needle type rotating bearings to absorb the
> >differential pressure and bending moments respectively. This
> >assembly
> >would be flooded with a waterproof grease via a zirc fitting located
> >opposite a bleed screw (to let the grease flow out during
> >maintenance).
> >The whole thing could be manufactured as an assembly with a flange to
> >hold a static seal. A nut on the inside could sandwich the hull to
> >prevent rotation. It could then be installed in a single reamed hole
>
> >to
> >reduce the amount of machining on the hull and reduce the cost
> >overall.
> >The ball and thrust bearings would also be very economical.
>
> Richard,
> Thanks for the info, it sounds great! But I cant visualize how this is
>
> put together or what it even looks like. Could you draw something up
> and send me a hard copy or a digital drawing? For instance, whats a
> "thrust bearing"? And where do you get such things? This particular
> problem is holding me up, I'm anxious to get it resolved and move on.
>
> Scott Shakespeare
>
>
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