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    • CommentAuthormecanito
    • CommentTimeJan 28th 2010
     
    Hello alls.

    I am newer,(sorry for my english, first).
    I have a question for yours. Is posible make the cams separately, harden it, and then soft solder to an axe of mild steel? This process could soft again the cams or not?
    Thanks.

    Antonio.
    • CommentAuthorgbritnell
    • CommentTimeJan 28th 2010
     
    Yes they can be made that way but I wouldn't solder them to the shaft. Normally the lobes are made, located on the shaft in the proper position, drilled for a pin, removed, hardened, reinstalled, pinned and then the pin is dressed down flush with the lobe.
    gbritnell
    • CommentAuthorkamran
    • CommentTimeJan 28th 2010
     
    The way I did it and it worked for me was
    I made the CAMS, then tapped each cam for a small set screw (4-40).
    harden the cams, position them on the shaft, used the CAM degree wheel and degreed each cam, tighten the set screw to hold them in position. Silver solder and removed the set screws.
  1.  
    IN the engine design for the Masstiff, the way they built the cams is pretty sim ilar to what you describe Antonio, they build the pieces, harden, clean and then Loctite, it works great, no need to braze /solder, deal with pins etc.
    In this built article, they also provide some ideas into how to align the different pieces into the main shaft to achieve the desired angles between cams.
    Antonio, if you do not have access to the Mastiff engine build article, send me your email and I will scan some of the relevant pages for you.

    Best regards
    Jaime
  2.  
    I agree with Jaime, loctite should not be under estimated, take into consideration the parts to be fit together have been made with proper fits. I have written an article on Loctite/anarobe type products and correct use and application for MEB magazine(Model Engine Builder) that could be of help. I forget which issue.... one of the early ones.

    They may be soft soldered without too much lose of hardening but brazing requires much more heat and this will interfere with hardening.... Go for loctite.... no mess to clean up either.

    Best of luck

    Jan

    Norway
    • CommentAuthormecanito
    • CommentTimeFeb 1st 2010
     
    Thank you very much all for yours replys.
    Jaime. I have the articles about Mastiff construction, thanks.
    Loctite is good but is expensive ! 50 euros ( + 60 $) I think ... If it can make with soft solder I will in this way.

    Best regards.
    Antonio
    • CommentAuthorkamran
    • CommentTimeFeb 1st 2010
     
    $60?
    Aren't we talking about epoxy?
  3.  
    Mecanito,

    Loctite is quite cheap, you should buy the smallest containers.... they look like very small toothpaste tubes.
    What country are you from? Meconito sounds spanish.... spain or south america? Maybe somebody can send you their extra loctite container.
    Much much easier then soldering in my opinion.

    Jan
    Norway
    • CommentAuthormecanito
    • CommentTimeFeb 2nd 2010
     
    I am Spanish yes.
    Please can you give me the reference for this loctite, Is Loctite 326?

    Thanks.
    Antonio
    Spain.
  4.  
    Antonio,

    here are a few links, they have the 0.5ml tube as well.... Can't be that expencive.

    Becareful with the high temp on Aluminium.... as they both have the same melting point.... in other words you will probably not be able to remove a bushing set with high temp loctite in aluminium.


    ->link<-

    ->link<-


    Best of luck

    Jan

    Norway