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  • #16
    good one Jim - that joke had character...

    and you insulted the mans electrical heritage - that's what we call in the states "a double wammy",,, just brought a tear to my eye

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    • #17
      What I'd have thought would take the time was finding the centre of the extension. It doesn't look like there was enough of the old shaft left to use a fixed steady to get the armature running true. It looks like it would be set a centre, mount, measure off, recut centre, repeat.

      Unless, turn it round, put extension in 4-jaw, dial off armature. Yes, that would work. You'd just lose the little bit in the 4-jaw.

      Well done. I hope you charged them a clumsiness penalty.
      Richard - SW London, UK, EU.

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      • #18
        Originally posted by jim davies
        ...Grab a swift bite whilst the weld dries...

        Lucas makes MIG welders?
        Yoo - fan - isuum for allowing the weld to cool.

        If lucas ever had enough electric to run a MiG welder their lights would never have flickered.

        That MiG is a BOC actually but also have Murex, Esab and Camarc MiG's. Each welder carries a certain wire, save time never having to swap out wire, just choose the welder needed.

        Sounds posh but you can pick older 3 phase MiG's up in the 300 amp range for peanuts, soon pays back in time.

        Answers to a couple of questions in no order.

        On armatures you have to be careful as regards heat, this one was Ok in that there wasn't much weld for the size of the job, shaft was 60mm diameter.

        On smaller ones you often have to weld, allow it to cool and do some more welding. Never quench unless you are absolutely forced to as it raises al sorts of problems like hard sport, bending badly etc.

        As regards picking the centre up there was just enough on the armature outboard of the knurl for the fan to get a steady on that has very slim bearings on the ends of the fingers.

        I have something like 7 steadies of different types between two lathes and often pick the steady / machine to suit the job.

        Never seen a steady that will do everything, the ones supplied are just generic make do's.

        YOD,
        Nice picture, always used to read him when he was in the paper.
        .

        Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.



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        • #19
          Originally posted by John Stevenson
          Local firm to me make big electrical cables, under sea stuff.
          Everything in this place is big.

          So they have this machine that melts and extrudes plastic to cover the cables, once started it's a process that can't be stopped.

          So yesterday morning they had problems with the machine, not sure what, but two fitters went up on the gantry and managed to get it going again but as they were tidying up one of them kicked a spare part off the gantry into the drive of the machine.

          Clumsy bastard.

          Result was the drive locked up and it sheared the key on the 60 HP DC drive motor.

          They pulled the motor and this dropped out.



          Not only did it wipe the key off level with the shaft it ripped the end completely off. Panic................

          This pic was taken as soon as the armature hit the deck, timed at 12.00 on the camera.

          One hour later at 12:56 it's been bored 5" deep and a stub shaft pressed in and the undercut transition between the two welded up.



          Grab a swift bite whilst the weld dries and back into the lathe.

          Last pic timed at 14:24 and just needs the keyway belting in but the guys have already been rung and on on their way.



          Another £7 18s and 6d to rush to the bank with.

          60 HP ??????? How many gadzillion revs does it do?

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          • #20
            That MiG is a BOC actually but also have Murex, Esab and Camarc MiG's. Each welder carries a certain wire, save time never having to swap out wire, just choose the welder needed.
            I can afford to do this with hacksaws, but not welders. Get handles at garage sales for 50 cents or so....
            "A machinist's (WHAP!) best friend (WHAP! WHAP!) is his hammer. (WHAP!)" - Fred Tanner, foreman, Lunenburg Foundry and Engineering machine shop, circa 1979

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            • #21
              Originally posted by Your Old Dog
              Not for Slur John. That's the price of a couple of pints and a stew plate. Life is good

              I have this burning image of Andy Capp that I can't get out of my mind!

              And:

              http://www.google.com.au/search?q=an...w=1920&bih=818


              http://www.google.com.au/#hl=en&rlz=....,cf.osb&cad=b

              Another Brit comic strip of the same ilk is "The Perishers":
              http://en.wikipedia.org/wiki/The_Perishers

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              • #22
                Sir John, Care to speculate on the knurl on the end of that shaft, right next to the break? Was that an existing repair for a sloppy bearing fit? Nice fix BTW. You say the shaft was 60mm, and you bored it out 5 inches, I work like that myself, mixed mode. To what diameter did you bore? Was the stub shaft a press fit?
                James Kilroy

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                • #23
                  If im not mistaken he already did - knurl was where the fan was held

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