Announcement

Collapse
No announcement yet.

Quick way for cutting splines

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Quick way for cutting splines

    Only applies to the older straight sided splines and also only if the tooth width is a common one.

    Got this in today.



    Some DC drive motor of some description and the motor has no front bearing, it relies on the pinion in the gearbox to keep it all in line.

    Well this one whilst not looking bad has some bag in it, I reckon a new armature or pinion on it's own will reduce the wear to acceptable limits but not going to happen as no one knows who made these.

    Well the pinion is going to cost a load so make a new insert for the motor to fit the worn splines. Quick measure up and I reckon they were 1/8" originally but now just a tad over 3mm so thinking if I make a new guide bush for the 3mm keyway broach and pop a hole in the bush 1/10 of a turn round from the keyway I can cut one and use the bush to index round ?




    So three cuts per spline and 10 splines later this was tapped onto the pinion and after tapping it on and off in various position it was a bang on fit.




    Bored the armature out and shrunk the new sleeve into position, seemed long winded but it was quicker than making a new slotting tool and setting the slotter up to do just this one bush, about 2 1/2 hours start to finish.
    .

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




  • #2
    Nice one John.
    What size press (tonnage) are you using to cut those splines with?

    Michael

    Comment


    • #3
      Should be able to do that with a generic smaller arbor press. I did some 8mm last week into steel with an arbor press. Not fun.

      Comment


      • #4
        Only a crappy Marlco hand press, bought it a while ago with a load of broaches but it's horrible.



        The handles at the front get in the way of what you are broaching and swinging these handle whilst facing them isn't natural.

        I have another press outside that's a ratchet press and the handle is to the side and you pull it down, far more natural, but it's a big bugger.

        This one is OK up to 1/4" but after that you know you are using it
        .

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



        Comment


        • #5
          Stop grumbling John it's green how can it be horrible ? Anyway next time you and Gerty come over or up to civilized land for tea pop in and let me have it.
          I mean the machine not a punch in the nose Alistair
          Please excuse my typing as I have a form of parkinsons disease

          Comment


          • #6
            Pretty neat setup John.

            How did you position the hole for the pin?

            Brian
            OPEN EYES, OPEN EARS, OPEN MIND

            THINK HARDER

            BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

            MY NAME IS BRIAN AND I AM A TOOLOHOLIC

            Comment


            • #7
              Shut the front door...that's great !!
              please visit my webpage:
              http://motorworks88.webs.com/

              Comment


              • #8
                Originally posted by bborr01
                Pretty neat setup John.

                How did you position the hole for the pin?

                Brian
                The POS Bridgy has a stepper driven 6" Hoffman dividing head one one end of the table al the while si it's a doddle to put the bush in this, mill the broach groove then tell the table to move 60 degrees and pop a hole in.
                it uses the Division master controller and is so easy to use.
                .

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



                Comment


                • #9
                  Diabolical cunning!

                  Comment


                  • #10
                    Originally posted by John Stevenson
                    The POS Bridgy has a stepper driven 6" Hoffman dividing head one one end of the table al the while si it's a doddle to put the bush in this, mill the broach groove then tell the table to move 60 degrees and pop a hole in.
                    it uses the Division master controller and is so easy to use.
                    Good one, Sir John! Very clever thinking of putting a pin in the broach bushing...
                    TexasTurnado

                    Comment


                    • #11
                      Slick, gotta remember that one.

                      Comment


                      • #12
                        Awsome, The simple things DO IMPRESS me!! Of course I'm a simpleton!!

                        Comment


                        • #13
                          Originally posted by ahidley
                          ... The simple things DO IMPRESS me!! Of course I'm a simpleton!!
                          Me too. So I guess I impress myself every day.

                          I ain't afraid o' dyin',
                          but I sure am gonna miss myself.

                          Comment


                          • #14
                            Originally posted by John Stevenson
                            Got this in today.

                            Some DC drive motor of some description and the motor has no front bearing, it relies on the pinion in the gearbox to keep it all in line.
                            John, that's an interesting motor. What did it come from? It looks like the spline is designed to provide axial movement for the drive motor??
                            "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

                            Comment


                            • #15
                              Darnit, John is there no end of your ideas! Great job!
                              mark costello-Low speed steel

                              Comment

                              Working...
                              X