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All in a days work.

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  • All in a days work.

    Well in a day anyway, work may not come into it.

    So this morning bright and early [ well for me anyway ] I set out for work, the reverse of the 34 steps I had taken the night before when they dropped 25 motors on me for conversion to a smaller frame setup [ shorten shaft, weld keyway up, turn down from 19mm to 14mm and re-keyway, then slot the mounting holes in the end cover x 25 times - booooring

    So 33 steps later and I fell over this pile of end covers, brake housings a rotor and a weird circular bit on the floor outside the door. Opens up and starts to get fire going, phone rings and this Herbert says did you find my parts ? Find them I bloody well fell all my length over them. I can see what's wrong with them except for the circular bit.

    That's an impeller that goes on the long rotor.

    Wot ?

    Speaking slowly because it's early " Goes on the long rotor "

    "Can't do the holes too big"

    "It's worn"

    Worn ??????????



    That's about 38mm or 1 1/2"



    The shaft is 24mm or a tad under 1"

    Now I have seen worm things before but the shaft isn't that bad compared to the bore of the impeller, most of the original keyway is still there on the shaft but totally missing from the bore. Add to this two cracks into the bore from the webs and it's cast iron.

    Phone goes again, any chance of it back for dinner ? Sure, but note I never said which dinner <g>

    First off weld the cracks up then stiff in outside jaws on 3 jaw chuck and bore the hole out, it went out to 42mm before it cleaned up, that's about 1- 5/8".
    Machined a slug up, pressed it in, loctited it and pinned it then bored it out to 24mm and stuck a 8mm keyway in.



    Rotor was straight forward so won't go into that.

    Leave all the rest they weren't important, then onto the motors.



    That's what 25 rotors look like ready to box up and go back first thing in the morning.

    I HATE ELECTRIC MOTORS.....................................
    .
    .

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




  • #2
    balancing

    Are the bigger holes around the edge for balancing or some other function?

    Does it need balancing? shouldn't think so from the size of the worm bore

    Steve Larner

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    • #3
      Nice work sir!

      Comment


      • #4
        I wager that if you botched a few you wouldn't get nearly as much business.

        The fact is that you are just too darn good at your job. Or that nobody in the area is so thorough. If you want to slow down a bit you know what to do about pricing.

        Keep up the good work - and the posts. I sure learn a lot from them, even though I have done a few DC motors and auto generators.

        Geoff

        Comment


        • #5
          Forgot to ask about the slug - did you use a roll pin or a solid one to pin it to the impeller?

          Geoff

          Comment


          • #6
            Yes spotted the balancing holes but no idea what this is off, never seen one like it before.

            Anyway it's all stuffed up now I have splatted 4# of nickel weld all over it , the motor people have very good electronic balancing gear, I'll just mention it to them and then it's up to them.

            The slug was drilled and tapped in three places to line up with the spokes and three 6mm allen grub screws fitted half in the bush, half in the impeller.

            It's not so much being good as being quick. OK this one was a special but many jobs are borderline whether to repair or replace and if you are too dear you loose out.
            What's better getting a regular small mouth full or a big bite and choke ?
            Some of the jobs may sound cheap but even the small ones go for one hours minimum labour and if you can do a couple per hour it's not so bad.

            That rotor in the picture I can easily do 3 or 4 in an hour because I'm geared up for it.
            Quick change tool holders, 4 MiG's all with different wire and all manifolded to the same bottles, Plenty of different chucks and steadies, Keyway milling cutters set up in holders, DRO's on machines and many more time saving tools and fixtures.
            .

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



            Comment


            • #7
              "shorten shaft, weld keyway up, turn down from 19mm to 14mm and re-keyway, then slot the mounting holes in the end cover x 25 times"

              John
              Just wondering...
              I do the same regularly, but I get "standard" motors and have to make them "metric"!

              If you are shortening the shaft and turn from 19 to 14 why fill in the old key slot?
              Won't the slot machine away.The key in 19-6 is 3.6 deep
              or perhaps these are woodruff keys?

              "What's better getting a regular small mouth full or a big bite and choke ?"

              around here it's:
              Shear for a life-time, butcher once!
              please visit my webpage:
              http://motorworks88.webs.com/

              Comment


              • #8
                Originally posted by motorworks

                If you are shortening the shaft and turn from 19 to 14 why fill in the old key slot?
                Won't the slot machine away.The key in 19-6 is 3.6 deep
                or perhaps these are woodruff keys?
                All my tables give 6mm key as 3.5 deep not 3.6.
                So 3.5mm deep on a radius of 9.5 so that leaves 6.0

                6.0 x 2 is 12.0 that's under 14 and leave a witness mark in the shaft.
                can't pick it up and use that because 14mm is on 5mm key.
                .

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



                Comment


                • #9
                  Yes
                  You are Right John
                  It will leave a mark!

                  Engineers Black Book says 3.6 max....
                  I will be looking for a refund in the AM
                  please visit my webpage:
                  http://motorworks88.webs.com/

                  Comment


                  • #10
                    John -

                    I always enjoy seeing your repair projects - there's so much to learn.

                    Having spent better than four decades doing repairs for a living, I sure have those I get to do more often than I'd like, too, but they pay the bills:

                    Cheers,

                    Frank Ford
                    HomeShopTech

                    Comment


                    • #11
                      Hmmmmmmm

                      John i havent worked on any Electric Motors BUT im beginning to Hate them also,. Yech Got to be a boring Repair time after time. I get weird Jobs and am SO HAPPY when theyre done and gone but they do tax my feeble mind to the bursting point time after time But I LOVE IT LOL Madman

                      Comment


                      • #12
                        Frank,
                        I would have no idea how to go about that.
                        Probably the best I could come up with would be a big G clamp and a tube of no nails and I'm not joking.
                        .

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



                        Comment


                        • #13
                          Originally posted by Frank Ford
                          John -

                          I always enjoy seeing your repair projects - there's so much to learn.

                          Having spent better than four decades doing repairs for a living, I sure have those I get to do more often than I'd like, too, but they pay the bills:

                          im going out on a limb here, a few steel rods, buried from the back with accenting wood plugs covering them ? beautifully sanded and re-stained and with new decals from Martin ?

                          my son tipped over his new les paul and cracked the neck. he wouldnt let me touch it but found someone that did and you;d play hell trying to find the repair. much like you, the guy was a "wood wizzard" .

                          so how do YOU fix something like that.

                          (john, i also steal threads)

                          Comment


                          • #14
                            "It' Worn"

                            Yes John, I can just imagine the conversation, Cleese and the dead parrot?

                            I used to have to stay behind at times to make sure the Muppets didn't harm themselves in the overtime, and kept simple multiple component jobs on one side that I could do in the office without creating a mess. These became know as "Ian's mindless tasks" cos once you got into the swing, it allowed youto battle on and drift, thinking of new ways to wind the natives up.

                            Regards Ian.

                            Did you say the impellor was made out of IRON???

                            I see.
                            You might not like what I say,but that doesn't mean I'm wrong.

                            Comment


                            • #15
                              Originally posted by Frank Ford
                              John -

                              I always enjoy seeing your repair projects - there's so much to learn.

                              Having spent better than four decades doing repairs for a living, I sure have those I get to do more often than I'd like, too, but they pay the bills:

                              That looks like a very expensive guitar.

                              Comment

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