The Association of Model Submariners.

Would you like to react to this message? Create an account in a few clicks or log in to continue.

* THE FORUM FOR ALL THOSE INTERESTED IN BUILDING AND OPERATING MODEL SUBMARINES *



Join the AMS - Registered Forum users can become members of the AMS and it's free ...... To join send an email with your name , address and phone number to amstreasure@googlemail.com


For a guide to past events see the "Shows and Events" section.

Papplewick Pumping Station SUBMARINE Day. 31st March - 1st April 2024.

$$$

&&&

::::

Who is online?

In total there are 3 users online :: 0 Registered, 0 Hidden and 3 Guests :: 1 Bot

None


Most users ever online was 180 on Tue Nov 05, 2019 6:03 am

Latest topics

» 868/915 Mhz as a viable frequency for submarines.
first attempt at end covers EmptyWed Apr 10, 2024 5:48 am by tsenecal

» Modulated electric fields for submarine communication in a "heads up" from Harry!
first attempt at end covers EmptyTue Apr 09, 2024 7:33 pm by geofrancis

» Laser cut Robbe U47 conversion
first attempt at end covers EmptyTue Apr 09, 2024 3:40 pm by david f

» ExpressLRS - 868/915 Mhz equipment
first attempt at end covers EmptyTue Apr 02, 2024 3:27 pm by tsenecal

» Information on camouflage patterns for German seahund
first attempt at end covers EmptyFri Mar 15, 2024 4:36 pm by david f

» WW2 mini sub build
first attempt at end covers EmptyTue Mar 12, 2024 1:56 pm by geofrancis

» Not the hobby I expected :)
first attempt at end covers EmptySun Mar 10, 2024 6:30 pm by cat

» Sheerline gasket material
first attempt at end covers EmptyMon Feb 19, 2024 9:24 pm by Michaelc

» Choice of CAD software and Printer for 3D printing
first attempt at end covers EmptyThu Feb 15, 2024 1:53 pm by david f

Statistics

Our users have posted a total of 12441 messages in 1980 subjects

We have 1008 registered users

The newest registered user is chargerdodge

Similar topics

    4 posters

      first attempt at end covers

      avatar
      willte
      Guest


      Posts : 119
      Join date : 2013-12-15
      Age : 71
      Location : lossiemouth morayshire

      first attempt at end covers Empty first attempt at end covers

      Post  willte Tue Feb 18, 2014 8:17 pm

      first attempt at end covers 00414 well its my first attempt at a end cover hope to improve with the next one bolts for holding in lathe

      Leogtleo* likes this post

      avatar
      Tom(ADMIN)
      AMS Forum Owner


      Posts : 3024
      Join date : 2010-11-05
      Age : 64
      Location : Nevada, USA

      first attempt at end covers Empty Re: first attempt at end covers

      Post  Tom(ADMIN) Tue Feb 18, 2014 9:48 pm

      Willie, that looks damn good to me. Nice and flush to the cylinder, double O ring...very good indeed.


      Richard
      tattooed
      tattooed
      AMS member


      Posts : 340
      Join date : 2011-05-16
      Age : 60
      Location : Bristol

      first attempt at end covers Empty Re: first attempt at end covers

      Post  tattooed Tue Feb 18, 2014 10:00 pm

      very neat what size is it and where are you going to get your o-rings from
      avatar
      willte
      Guest


      Posts : 119
      Join date : 2013-12-15
      Age : 71
      Location : lossiemouth morayshire

      first attempt at end covers Empty Re: first attempt at end covers

      Post  willte Tue Feb 18, 2014 10:30 pm

      the  size is to fit 58mm id tube  made it from20 mm thick  Perspex  I cut out blanks with a 73mm hole saw  2 from 105mmx150 mm Perspex blanks which I go 2 off  on e-bay for just over £6 also ordered 53mm id x3mm o- rings off e-bay      the main sizes are outer od 63mm inner od 58mm  6mm lip the slots are in 2mm  from the end 3x2.5mm then 3
      mm space then 3x2.5mm slotfirst attempt at end covers 00415
      avatar
      willte
      Guest


      Posts : 119
      Join date : 2013-12-15
      Age : 71
      Location : lossiemouth morayshire

      first attempt at end covers Empty seals

      Post  willte Wed Feb 19, 2014 4:49 pm

      up at b&q today picked up some O-rings to give it a try 35mmidx3mm fitted with a wee struggle  to the cap but very nice fit in the tubefirst attempt at end covers 00611

      Leogtleo* likes this post

      nigele(ADMIN)2
      nigele(ADMIN)2
      AMS Chairman


      Posts : 1107
      Join date : 2010-11-06
      Age : 70
      Location : Braintree, Essex

      first attempt at end covers Empty Re: first attempt at end covers

      Post  nigele(ADMIN)2 Wed Feb 19, 2014 7:05 pm

      Hi Wilte,
      Are you saying that the o ring grove is 3mm wide and 2.5mm deep,and the o ring section is 3mm,if this is correct you need to open up the sides of the grove to allow for the expansion when the o ring is compressed otherwise you not get the end cap out when the have been in place for a few days,personally I would open the grove to around 4mm, but the width is not of any importance to the sealing,when I do piston tanks I would make the grove 2mm wider than the section of the o ring this causes the o ring to roll in the grove and that action breaks the initial grip that the seal has on the cylinder, the same principle applies with your end caps you need the o rings to roll in the grove slightly to break the seal when you pull them out.
      avatar
      willte
      Guest


      Posts : 119
      Join date : 2013-12-15
      Age : 71
      Location : lossiemouth morayshire

      first attempt at end covers Empty Re: first attempt at end covers

      Post  willte Wed Feb 19, 2014 7:39 pm

      thank you nigele, I am still thinking of the old days when I use to machine and fit o rings to hydraulics use to work out the area of the seal and leave a mm for compression
      nigele(ADMIN)2
      nigele(ADMIN)2
      AMS Chairman


      Posts : 1107
      Join date : 2010-11-06
      Age : 70
      Location : Braintree, Essex

      first attempt at end covers Empty Re: first attempt at end covers

      Post  nigele(ADMIN)2 Wed Feb 19, 2014 8:53 pm

      your welcome sir,there is a formula for radial o rings I have it somewhere but it really don't work on acrilic tube it's a bit trial and error,the tube is so rippley and the tolerances are all over the place I have seen a 2mm tapper in a tube 12 inches long,its worth looking at silicon o rings they are much softer and are more forgiving,
      anther tip make sure you sand the ends of the cylinder so there are no marks or scratches if you don't I have known the tube to crack all the way along it,Richard has had this happen to him,it is one of the problems with radial seals,and why I use compression seals instead but that comes with it's own set of problems.
      avatar
      willte
      Guest


      Posts : 119
      Join date : 2013-12-15
      Age : 71
      Location : lossiemouth morayshire

      first attempt at end covers Empty silicon o-ring seals

      Post  willte Fri Feb 21, 2014 1:37 pm

      took nigele advice and got some silicon O-rings I got then from polymax 53mm id x2.65 mm they are25 pence each but your order must be above £10 but below £15 and free postagefirst attempt at end covers 00216

      Leogtleo* likes this post

      avatar
      willte
      Guest


      Posts : 119
      Join date : 2013-12-15
      Age : 71
      Location : lossiemouth morayshire

      first attempt at end covers Empty Re: first attempt at end covers

      Post  willte Tue Feb 25, 2014 2:30 pm

      a robbe pump fits ok just a plate  and bracket to make now first attempt at end covers 00124

      Leogtleo* likes this post


        Current date/time is Tue Apr 16, 2024 2:29 am