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  1. bobden72

    Loctite or JB Weld

    Just to add to the list when I needed some retainer for my cylinder liners on my Edwards 5 I contacted Loctite and they recommended 620 or 638. They are both cylindrical retainers and are both high temperature resistant up to 200 deg C. I fitted my liners no primer just a clean with some...
  2. bobden72

    Holt 75 from Italy

    Hay that sounds really nice great tic over speed, congratulations.:)
  3. bobden72

    some basic direction regarding boiler making

    For boilers over say 10Lbs pressure. Soft solder does not have the tensile strength. You never ever test a boiler with air, always water as its non compressible.
  4. bobden72

    straight 6

    Lovely sounds as good as it looks.
  5. bobden72

    straight 6

    How is the compressed air getting from the turbo to the carb inlet ? Very nice work mind. Ah just noticed the intercooler in front of the rad, all clear now.
  6. bobden72

    Valves Leaking

    Very informative thanks Terry.
  7. bobden72

    Valves Leaking

    . Mauro thanks for your input and your time just to clarify my seat cutting tool and the lapping tool both have a pilot dowel to keep them concentric as per SIC. I also make my valves as do you in two parts silver soldered together then machined again as per SIC. My next plan is have some...
  8. bobden72

    Valves Leaking

    A few days ago there was a discussion on valves leaking / seats, I have this problem with my Cirrus and joined in the conversation, but my problem was sort of side stepped with no suggestions. So I thought if I started a new discussion some one might have an ideal. I have just finished a...
  9. bobden72

    valve lapping problem

    All very interesting as I have just finished a Cirrus and can not get any compression as the valves are leaking. I have cut the seats to be 1/32 wide and ground them in by hand, still leaks! Recut the seats and ground the valves to a 1deg shallower than the seats, blued the seats turned the...
  10. bobden72

    Myford S7 Chuck Lock

    Number one is cutting a left hand thread! I have never had a problem of the chuck unscrewing its usually the other way trying to get it off.
  11. bobden72

    Bandsaw blade problem

    [ My band saw has always made a very slight knock and its the joint in the blade as it goes through the roller. This has never caused problems with mine, you say you adjust it till it does not slip, I do mine up as tight as I can, never had an issue in 12 years.
  12. bobden72

    Bentley BR2

    Me too.
  13. bobden72

    Stuart No 4 Engine

    Maybe a bit of house keeping is required :)
  14. bobden72

    Conley engine casting set

    Not a lot of point having the castings If you are not going to build it.
  15. bobden72

    How do you keep going on a long project like Lady Stephanie Beam Engine

    Jenny , I too hover and clean my machines down and put all tools in their proper place ever evening when I finish in my shed. Then I know where every thing is the next day. My shed is also connected to the house so as you say just open a door and walk in. The central heating also means who...
  16. bobden72

    Alloy or steel

    A few pictures of my Case, just fitted the gears I cut from cast iron. I am also fitting a flywheel clutch and Woolf valve gear to be more like a Case. A dummy heat exchanged will also be fitted along with a water pump. As for the cylinder I am going to fit a cylindrical crosshead guide again...
  17. bobden72

    Alloy or steel

    Wesley you will need bigger than 2 1/2" diameter bar. 2 1/2" is the DP figure the actual gear blank for the 120 tooth bull gear needs to be 2.541 diam. All the gears diameter needs to be bigger than the PD figures quoted, which is a theoretical circle. To get the blank outer diameter use the...
  18. bobden72

    Alloy or steel

    Wesley I have just finished cutting my gears today for my tractor. I have made all my gears from cast iron and made them all .210" thick, the thickness was based on a commercial 48DP gear I had in my might be useful box. .125" seems rather narrow to me, I would think aluminium was not a good...
  19. bobden72

    First Engine - Wobbler

    Nice one.
  20. bobden72

    Bristol SMEE show 2018

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