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  1. #16
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    Sep 2008
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    Perth
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    I would bevel a lot personally.

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  3. #17
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    Sep 2010
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    Lebrina
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    Quote Originally Posted by .RC. View Post
    Quick question....

    I will be welding the 25mm plates together in a T shape with fillet welds... Should I V out both sides for extra weld, or will a few plain fillet welds overlaid be enough... Will be using 4mm 7018 rods
    That depends on whether you have sufficient room to put enough weld either side of the plates. Beveling the plate will allow a weld with less external reinforcement to have the same strength.
    A general rule is that your fillet weld should be the same size as the plates being joined - 25mm plate= 25mm leg length of your fillet. This can be reduced somewhat if both sides of the joint are welded of course and assumes that you wish to take advantage of the full strength of the plate. Often the plate thickness is more for bearing area than outright strength.
    Draw out a 25mm fillet and you will see that it is a fair lump of a weld. A 25mm fillet could be as many as 10 runs with a 4mm electrode.
    One final thought is that when welding multi pass joints, it is good practice to stagger the restarts so that you do not create a potential weak point from all your restarts lining up.

  4. #18
    Join Date
    Aug 2008
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    near Rockhampton
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    4,304

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    Made up sixteen bosses to weld into the bored holes... In hindsight I should have bored the main holes to nominal size, and then bored the bosses to nominal size and welded them on via an alignment bar...

    As it stands I bored the holes about 10mm oversize, then carefully machined up the hollow bar so each piece goes in from either side, meeting in the middle..

    Anyway it is done now... I do not have a long enough bar to go through the full length of the four pieces to hold everything in alignment... I need a 38mm diameter bar, but the biggest I have is 35mm.. I think I will align using the short sections you see in the photo and careful measuring..
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    Light red, the colour of choice for the discerning man.

  5. #19
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    Aug 2008
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    near Rockhampton
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    Getting there... First trial fitting... it fits...

    20140915_175121.jpg
    Light red, the colour of choice for the discerning man.

  6. #20
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    Sep 2010
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    Lebrina
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    Are you going to put some sort of a torque tube between the two side plates? As far as I can see that design will be prone to twisting given that it is only flat bar tying the two sides together.
    Other than that, top job!
    A piece of heavy walled pipe, say, 100NB, would be ideal as a torsional member.

  7. #21
    Join Date
    Aug 2008
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    near Rockhampton
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    Hope to do some more on the quick hitch tomorrow.... I have some heavy walled 3" pipe here....... 4" pipe would not fit properly..

    In the meantime I had to make a new fuel tank for my crane truck... I was going to claim warranty but I think since the truck is around 1969 vintage, it may be out of warranty by now...

    And in the photo's you can ignore the new fabricated base for the crane i made... I apparently was not supposed to do that..
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    Light red, the colour of choice for the discerning man.

  8. #22
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    Sep 2010
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    Lebrina
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    Sounds like the 3" will be the go then.
    What is the old crane truck? I am guessing it's of english descent.

  9. #23
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    Aug 2008
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    near Rockhampton
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    It is a Toyota DA115
    Light red, the colour of choice for the discerning man.

  10. #24
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    Sep 2010
    Location
    Lebrina
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    An old Toyota, didn't see that coming.
    They were a good old workhorse, the Hydro Electric Commission had heaps of them, something of a rarity today. Parts are non existant new I think.
    What do you use the old girl for? I'm guessing that the crane went out of certification a good while ago.

  11. #25
    Join Date
    Aug 2008
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    near Rockhampton
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    Yea seems a tough old thing... I have not had it long... I got the crane off ebay, you can read the story about it here https://www.woodworkforums.com/f65/reconditioning-windmill-story-157547

    I have finished off the assembling of the quick hitch and tack welded it together... it fits on the loader and partly fits the bucket.. The loader frame and bucket have been "repaired" by a previous owner.... By the quality of the welding work I doubt it was professionally done and as such one pin hole does not line up unless you were to push the bucket against something hard.. I will sort that out on the bucket..

    I found some 100X150 RHS and used that to brace it for torsional loads rather then use some 3" pipe..



    All I have left to do is fully weld it and paint it, plus a couple of pins...
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    Light red, the colour of choice for the discerning man.

  12. #26
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    Jun 2010
    Location
    Canberra
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    769

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    We gonna see some hydraulics on the bottom pins?

  13. #27
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    Aug 2008
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    near Rockhampton
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    I would like to, but I do worry about hydraulic bits being ripped off by sticks and logs...
    Light red, the colour of choice for the discerning man.

  14. #28
    Join Date
    Aug 2008
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    near Rockhampton
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    A few teething problems or design faults whichever way you want to look at it

    I could not fully dump as the quick hitched fouled on the loader arms before it came onto the proper stops..

    So I ground some out, and could not get the grinder into the slot that needed material removed...

    So I dragged out the old 400AS welder and the air arc gouger.... 400 amps of oomph soon shifted the material and while I was at it I gouged out the crappy welds holding one side of the bucket pin bosses in... One side is out of alignment so it has to be repositioned...
    Light red, the colour of choice for the discerning man.

  15. #29
    Join Date
    Jan 2012
    Location
    Eucla, the first town in WA
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    6

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    If you're going to use forks on that quick hitch, it might pay to have a think about where you mount the RHS so that you get a line of sight to the fork tips.

    Russell

  16. #30
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    Aug 2008
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    near Rockhampton
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    It is a bit late now.... I just completed it 15 minutes ago...

    These days you can get reversing cameras for $50 so you could put one of them somewhere if you wanted....

    I might make some mods at a later date, depending on how easy it is to take the pins in and out..
    Light red, the colour of choice for the discerning man.

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