Some boiler questions (and hopefully my progress)

Discussion in 'Boilers' started by Brookesy, Nov 29, 2017.

  1. Nov 29, 2017 #1

    Brookesy

    Brookesy

    Brookesy

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    56
    Likes Received:
    18
    My brain hurts... Reading, reading, reading, sketching, drawing and so far I've managed to flesh out the basics of a design-as-you-go engine based (loosely) on 'Steve's Simple Engine/Boiler' using materials I have on hand (mostly left over from my attempts 25+ years ago) as much as possible. Hopefully the end result will be an oscillating engine of approx. 12 mm bore with a 50 mm diameter copper boiler.

    I'll put my questions here as they come to mind.

    Question #1 - Silver Solder: I have a few bits left over but they won't go far. Can any Aussies please advise a good product/silver %/source for silver solder?

    Bearing in mind future projects will increase in size etc.

    Thanks Folks
     
  2. Nov 29, 2017 #2

    bazmak

    bazmak

    bazmak

    BAZMAK

    Joined:
    Dec 12, 2012
    Messages:
    1,969
    Likes Received:
    1,105
    I have just ordered some from Wayne Roberts at $20 per stick
    ME model engineering supplies Melbourne You can download
    his extensive catalouge and price list for most things including castings
    and fittings etc.Not cheap but good service
     
  3. Nov 30, 2017 #3

    Brookesy

    Brookesy

    Brookesy

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    56
    Likes Received:
    18
    Thanks for that.

    Looking around suggestions are generally 40% silver. Any comments would be great
     
  4. Nov 30, 2017 #4

    abby

    abby

    abby

    Well-Known Member

    Joined:
    Apr 14, 2009
    Messages:
    337
    Likes Received:
    78
    Brookesy for such a small oscillator a soft soldered boiler would be quite adequate , good enough for Mamod !
    Dan.
     
  5. Nov 30, 2017 #5

    bazmak

    bazmak

    bazmak

    BAZMAK

    Joined:
    Dec 12, 2012
    Messages:
    1,969
    Likes Received:
    1,105
    I think 45% is the std but soft solder may be adequate for sealing if the
    joints are also mech. fixed. Ie rivited the soft soldered for sealing
    Soft solder is poor for a mech joint until it has a large surface area
    it tends to crack with time,movement or vibration
     
  6. Nov 30, 2017 #6

    fcheslop

    fcheslop

    fcheslop

    Well-Known Member

    Joined:
    Apr 7, 2010
    Messages:
    609
    Likes Received:
    120
    I realise this company is a bit to far away from you but the site has some very good information about and also using silver solder products
    For a simple pot boiler in copper I would still silver solder it even if its just to practice or hone up some skills
    Iv recently started making a small batch of Bowman Peter Pan steam boats with a nice little wobbler
    Here is the link http://www.cupalloys.co.uk/for-model-engineers/
    Good luck with the build
    kind regards
    frazer
     
  7. Dec 1, 2017 #7

    Brookesy

    Brookesy

    Brookesy

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    56
    Likes Received:
    18
    Thanks for the replies folks. Yes indeedy, this project is all about using mostly what I already have in the shed and rubbing the rust off skills I haven't used for a very long time, so silver soldering is high on the list. I'll check out that site.
     
  8. Dec 15, 2017 #8

    texta

    texta

    texta

    Active Member

    Joined:
    Sep 17, 2013
    Messages:
    34
    Likes Received:
    19
    bunnings in toowoomba carry a good range of solder's thats where i get mine from .
     
    Brookesy likes this.
  9. Dec 16, 2017 #9

    Brookesy

    Brookesy

    Brookesy

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    56
    Likes Received:
    18
    Thanks mate. I'm in Warwick so it's not that far. Bunnings here is a bit limited
    I bet it's hot in Texas today
     
  10. Dec 17, 2017 #10

    texta

    texta

    texta

    Active Member

    Joined:
    Sep 17, 2013
    Messages:
    34
    Likes Received:
    19
    no probs . samios plumbing in toowoomba carry a good range of copper pipe if you need any of that .
     
    Brookesy likes this.
  11. Dec 17, 2017 #11

    Brookesy

    Brookesy

    Brookesy

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    56
    Likes Received:
    18
    Thanks mate. Good to know
     
  12. Dec 28, 2017 #12

    Brookesy

    Brookesy

    Brookesy

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    56
    Likes Received:
    18
    Well folks, I have another boiler related question...
    The steam engine is coming along and I'm ready to silver solder the frame so it's time to build a brazing hearth. Fire bricks are about $20 (Au) each here and CalSil is very expensive - about $30+ (Au) for a piece about 250 x 120 mm. Looking at Hebel blocks they're a lot cheaper but they're 'special order' at Bunnings, not kept in stock. The Q: Has anyone used Hebel blocks for a hearth and also does anyone know a stockist?
     
  13. Dec 29, 2017 #13

    deeferdog

    deeferdog

    deeferdog

    Well-Known Member Project of the Month Winner

    Joined:
    Mar 23, 2014
    Messages:
    197
    Likes Received:
    209
    Hi Brooksey,
    I made a small wedding/braizing box and lined it with Hebles from Bunnies. Never had any issues. Hope this helps. Cheers, Peter.

    20171229_140539.jpg
     
    Brookesy likes this.
  14. Dec 29, 2017 #14

    Cogsy

    Cogsy

    Cogsy

    Well-Known Member

    Joined:
    Jul 30, 2012
    Messages:
    1,977
    Likes Received:
    561
    Gender:
    Male
    Don't know what you have in your area but I went to an 'artsy' type little pottery shop here in Perth and got super lightweight insulation bricks for about $6 each. Same shape and size as a normal brick but almost the weight of Styrofoam. I just keep them loose and arrange them into the shape I need as I need them.
     
    Brookesy likes this.
  15. Dec 29, 2017 #15

    Brookesy

    Brookesy

    Brookesy

    Well-Known Member

    Joined:
    Oct 31, 2017
    Messages:
    56
    Likes Received:
    18
    Thanks fellas,
    Good to know the Hebel is ok.
    I'll be going through Brisbane tomorrow so I'll check around. The bigger Bunnings might stock it
     
  16. Mar 9, 2018 #16

    MRA

    MRA

    MRA

    Well-Known Member

    Joined:
    Feb 14, 2012
    Messages:
    117
    Likes Received:
    24
    This is an old thread - but I thought I might mention that the ceramic (?) radiant panels out of an old gas fire make OK material for building hearths out of, and if you can find a scrap gas fire they're free!
     

Share This Page