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  1. #1
    Join Date
    May 2021
    Location
    australia
    Posts
    50

    Default Ball turning adapter.

    hey all, well i thought i might share what i done over the last couple of days.


    I've wanted to get my ball/curve thing onto my lathe so i can do my shift knob

    s-l160044.jpg


    So first thing was to mock it up and see how i can get it to sit.

    pretty damn close, and can shim it for a bit of height if needed.


    201861346_321608479610565_2322100838383472652_n(1).jpg






    this is the piece of random metal that i'll be using.


    198273283_1938992502929740_36861440202497647_n(1).jpg

    made it nice in the lathe, also yeah i know my tool wasn't perfectly centre :'( don't worry i ground it off nicely

    197562750_2026010304217534_6698313882035399584_n(2).jpg


    making the other part of the adapter. I got the angle reversed on this one woops and had to make another haha.

    201425726_793627641339699_8262336173920410262_n(1).jpg

    fits into place nicely
    203741113_322570299546832_529674729599416019_n(1).jpg
    201128538_1423439198030970_8888235339821796060_n(1).jpg

    drill a centre hole so i can plug weld it and aldo drill and tap the outer connecting holes for the bolts


    203545583_336728811372365_2731595998520561335_n.jpg


    Well, umm the weld even though it was nice didn't hold to the small circle piece, so i will just have to drill and tap it and hold it with another bolt.
    198841930_499970941108673_714788608183743846_n.jpg199280575_334616091401572_5879176109515244359_n.jpg

    202981296_518030589343292_1754912213094785961_n.jpg


    Here's the circle piece, i've drilled, tapped and made clearance so the bolt head can be flush with the surface. I had to grind down the bolt head a little bit as i needed a 14mm drill bit and i only had a 13mm.
    197162455_2594034634225971_6358005494229357378_n.jpg198133243_796323581022743_7368632091044933413_n.jpg



    Here we have it all bolted together


    200217327_921156568446457_3817490743306683355_n.jpg


    and to the piece i'll be using it on first



    197576752_491053085528297_8052594958544850707_n.jpg




    and how it turned out

    I know there's a little step, but sadly that's where the chuck jaws were holding onto the piece and i had to take 0.1mm off of the rest of the part to smoothe it out from previous mess ups.

    203606137_402544867689852_4937086159569003826_n.jpg

    Any ways, i hope you guys like this. Perhaps this will give someone else the idea if they get one of these ball turning things off of ebay. Mine's been sitting for a month now until today.

  2. #2
    Join Date
    Dec 2013
    Age
    56
    Posts
    1,416

    Default

    Nice job, I really do need to make mine.

    I do a a lot of weldments in my home shop.
    For next time, if I was plug welding that I would have drilled a larger hole halfway down and made the pin around 3mm or so short of the surface.
    Then pre heat it to take the cold out of it.
    It doesn't need to be anywhere near red hot, just to hot to touch.

    Slowly welding around the gap in a circular motion working your way to the centre to fill it up.

    This way the weld gets between the pin and hole, the top of the pin and to the side wall of the hole.
    When machined flat it has the strength to stay put.

    Sent from my 5007U using Tapatalk
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