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Scott, You have a proven design. If it says two, then use
two. Just pay attention to the dimensional tolerances on the drawings and
surface finishes and assemble with good lubrication. K-boats are bullet
proof. Read up on O’rings. It is easy to get catalogs and
they have all the info you need. Part of building subs is learning about
all the technical aspects. Without knowing the design I would hazard a
guess that the shaft will have a shoulder and a plastic bearing washer as
well. That will act as a seal under pressure also. Hope that helps.
Regards, Hugh From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Scott Waters Yes,
it is for a K-350 that I am building from scratch. It does have 2
"O" rings per tru-hull. Would it be better to put
3 "O" rings in? it is a 3" long tru-hull. I really
appriciate the info. From: hc.fulton@gmail.com I would be happy using a common O’ring myself but I
don’t know what your clearances are or if you have a double seal or if
you have a groove wide enough for a backup ring etc. The pressures are
not high Max 200 psi and O rings are used at 10 times that pressure and
greater. Are you building the shaft and housing or is it for an old 350 and
you are refurbishing. Any through hull is a bit more critical than a
motor or some other gland. But your hatch O’ring is probably more
important and that wouldn’t be anything too special. From:
owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org]
On Behalf Of Scott Waters It
is for the K-350 tru-hull that rotates and turns the VBT on and off. What type
of material is that "o" ring made of? Is that just like a common
hardware store "o" ring? I just don't know anything about
"o" rings besides what they do. From: hc.fulton@gmail.com What was the application. Your number seemed to be a mil
spec 90 durometer but generally common O’rings are pretty resilient. Get
the clearances and surface finishes right and good lubricant. From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Scott Waters Where can I buy the Stillman MS9021-114
(.103x.612 I.D.) "O" Ring? I have been searching www.mcmastercarr.com with no luck. Any
help? The
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