[Public-List] Shaft Seal / Stuffing box

Mon Mar 18 06:52:47 PDT 2019

David,
Thanks for the video.

Most stuffing boxes use a heavy wall hose that is the same diameter on both
ends.

I have not been able to find a hose or bellows that is 1-3/8" on one end
and 1-3/4" that would also be suitable for below the waterline use.  I
found some silicone couplings made for automotive turbochargers. It doesn't
appear heavy enough to counteract any torque from friction within the
stuffing box.

On Fri, Mar 15, 2019 at 2:00 PM David Fay <davidfay999 at gmail.com> wrote:

> Andrew,
>
> I'm confused by your note. In your description of the mismatch in size
> between the stuffing box and the stern tube, you fail to mention the
> bellows (which some call the hose) that connects the rear of the stuffing
> box with the front of the stern tube. It's the bellows that must accomodate
> the mismatch.
>
> Have you looked for a bellows that is 1-3/8" on one end and 1-3/4" (the
> presumed outside diameter of the rear of the stuffing box) on the other?
> For example, the nitrile bellows shown with the dripless stuffing box in
> the link you provide is clearly a reducing design so they must be out there
> somewhere. Even if you can't find an exact match to the O.D. of stuffing
> box and stern tube, wouldn't compressing the bellows with hose clamps work?
>
> David
> Blue Teal #284
>
> > On Mar 15, 2019, at 1:30 PM, Andrew Johns via Public-List <
> public-list at lists.alberg30.org> wrote:
> >
> > I figured I would post a followup to the stuffing box question.. that
> > turned into a discussion on deck hatches :P
> >
> > The 7/8" prop shaft with a 1-3/8" stern tube seems to be a odd
> combination.
> >
> > It appears no conventional stuffing boxes are available with our shaft
> > size and stern tube combination.  I called Buck Algonquin to inquire if
> the
> > 1- 3/4  model could be modified to accommodate a 1-3/8 tube, but there is
> > not enough material in the casting.  Some sort of 1-3/4 to 1-3/8 reducer
> > would need to be fabricated and they did not like the idea of sleaving
> the
> > 1-7/4 id hose with another to reduce it down to 1-3/8 od.
> >
> > The only option it seems is the PSS drip less shaft seal. Which uses a
> > carbon flange pushing against a stainless ring (like my existing lasdrop
> > seal).  PN 02-078-144 which goes for around $225 online.The applications
> > engineer said due to our cutlass bearing in the stern tube it may require
> > water injection to provide adequate cooling.  The general consensus
> online
> > is that folks either hate this thing and it will sink your boat with out
> > warning while you sleep or it is the best thing ever invented.
> >
> > https://www.shaftseal.com/pss-type-a-seal.html
> >
> > Looks like I will be ordering one of these in the next few weeks while I
> > wait for the ice to melt.
> >
> > Thanks for your feedback everyone!
> >
> > Regards,
> > Andrew
> > ECOLA #104
> >
> >
> >
> > On Fri, Mar 8, 2019 at 11:47 AM Mike Lehman via Public-List <
> > public-list at lists.alberg30.org> wrote:
> >
> >> Check with Hamilton Marine in Maine...they have lots of hatches, may for
> >> commercial use, so they are very strong and durable.
> >>
> >> www.hamiltonmarine.com
> >>
> >>
> >> On Fri, Mar 8, 2019 at 7:48 AM Jeffrey Randall via Public-List <
> >> public-list at lists.alberg30.org> wrote:
> >>
> >>> Thanks,
> >>>
> >>> Jeff
> >>>
> >>> On Friday, March 8, 2019, Wes Gardner via Public-List <
> >>> public-list at lists.alberg30.org> wrote:
> >>>
> >>>> Hi Jeff,
> >>>>
> >>>> Mine is made by Tempress. Google Tempress Access Hatch and that will
> >> put
> >>>> you on the right track. Mine is about 13x22. Yes, it’s plastic and
> >>> probably
> >>>> is NOT suitable for offshore work. You CAN walk/stand directly on it.
> I
> >>>> change mine out every five years or so as it might get brittle.
> Someone
> >>>> makes an aluminum that WILL be suitable for offshore work, can’t
> >> remember
> >>>> who ...maybe Bomar?
> >>>>
> >>>> Wes
> >>>>
> >>>> Sent from my iPad
> >>>>
> >>>>> On Mar 7, 2019, at 6:17 PM, Jeffrey Randall via Public-List <
> >>>> public-list at lists.alberg30.org> wrote:
> >>>>>
> >>>>> This is for Wes.  Where did you get the floor hatch for your
> >> Alberg.  I
> >>>>> have decided after going God knows how long without updating my
> >>> stuffing
> >>>>> box. that this is the spring.... However as always that means two
> >>>> projects
> >>>>> at least.  The Floor hatch and the stuffing box.  Any info size type
> >>> etc
> >>>>> would be great.
> >>>>>
> >>>>> Jeff Randall
> >>>>> Yankee Star.  296
> >>>>>
> >>>>> On Thu, Mar 7, 2019 at 2:55 PM Wes Gardner via Public-List <
> >>>>> public-list at lists.alberg30.org> wrote:
> >>>>>
> >>>>>> Hi All,
> >>>>>>
> >>>>>> I guess I'm a traditionalist...I'll stick with the good old tried
> >> and
> >>>> true
> >>>>>> stuffing box and deal with a few drips, the main reason....everyone
> >>>>>> understands these things.  I suppose the down side might be in the
> >>>> limited
> >>>>>> access to the stuffing box.  My boat has a large access port in the
> >>>> cockpit
> >>>>>> sole so I can readily and easily adjust/maintain my stuffing box.
> >>> I've
> >>>>>> also repacked many, many from my years in the yards so I'm not
> >>>> intimidated
> >>>>>> when repacking either in the water or on the hard.  A well
> >> maintained
> >>>>>> stuffing box can last virtually forever I suppose.  Also there's no
> >>>> need to
> >>>>>> REALLY tighten the lock nut....these things are bronze (soft metal).
> >>>>>>
> >>>>>> Wes
> >>>>>>
> >>>>>> On Thu, Mar 7, 2019 at 10:40 AM George Dinwiddie via Public-List <
> >>>>>> public-list at lists.alberg30.org> wrote:
> >>>>>>
> >>>>>>> Andrew,
> >>>>>>>
> >>>>>>> My thoughts are on
> >>>>>>> http://alberg30.org/maintenance/MechanicalPropulsion/DriplessSeal/
> >>>>>>>
> >>>>>>> Are you sure that teflon packing is dripless?
> >>>>>>>
> >>>>>>> - George
> >>>>>>>
> >>>>>>>> On 3/7/19 10:24 AM, Andrew Johns via Public-List wrote:
> >>>>>>>> On #104 we have an old lasdrop dripless shaft seal that is no
> >> longer
> >>>>>>>> supported by the manufacturer and due for replacement.
> >>>>>>>>
> >>>>>>>> What are the groups thoughts on shaft seals/ stuffing boxes?
> >>>>>>>>
> >>>>>>>> I'm leaning towards a conventional stuffing box with teflon
> >> dripless
> >>>>>>>> packing.
> >>>>>>>>
> >>>>>>>> Thanks,
> >>>>>>>> Andrew
> >>>>>>>> ECOLA #104
> >>>>>>>> Colchester ,VT
> >>>>>>>
> >>>>>>> --
> >>>>>>> ------------------------------------------------------------
> >>>> ----------
> >>>>>>>  When I remember bygone days                         George
> >>> Dinwiddie
> >>>>>>>  I think how evening follows morn;
> >>> gdinwiddie at alberg30.org
> >>>>>>>  So many I loved were not yet dead,
> >>> http://www.Alberg30.org
> >>>>>>>  So many I love were not yet born.                          also
> >>> see:
> >>>>>>>               'The Middle' by Ogden Nash
> >>> http://idiacomputing.com
> >>>>>>> ------------------------------------------------------------
> >>>> ----------
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> _______________________________________________
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> >>>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Sincerely,
> >>>>>
> >>>>>
> >>>>> Jeff Randall
> >>>>> JCMedical
> >>>>> 603-498-5574
> >>>>> _______________________________________________
> >>>>> These businesses support your Association:
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> >>>>
> >>>
> >>>
> >>> --
> >>> Sincerely,
> >>>
> >>>
> >>> Jeff Randall
> >>> JCMedical
> >>> 603-498-5574
> >>> _______________________________________________
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> >>>
> >>
> >>
> >> --
> >> Mike Lehman
> >> ~~~_/)_/)~~_/)~~~
> >> _______________________________________________
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> >>
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