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  •  » Self tapping leadscrew we’ll sort of

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    11/21/2020 6:48 PM  #1

    Daze
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    From: Kalispell MT
    Registered: 1/24/2013
    Posts: 1,130

    Self tapping leadscrew we’ll sort of

    I made a post earlier https://fyi.boardhost.com/viewtopic.php?id=11231 about the leadscrew on my lathe being standard ACME threads on a 20mm shaft. Anyway I needed a new brass nut so I purchased a 3/4-10 lh acme nut and modified the end of my leadscrew by tapering the end and cutting 8 groves in its threads kind of like a tap. I cut the nut in half and then spent 3 hours total working both donuts back and forth on the leadscrew. It was a pain but worked and I know have nuts with the correct thread.

    If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
     

    11/21/2020 7:14 PM  #2

    Bullet Bob
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    From: Montrose, Colorado
    Registered: 4/01/2013
    Posts: 4,887

    Re: Self tapping leadscrew we’ll sort of

    Ain't ingin-nuity grand.  Good for you....again....Day.

    BB1

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    11/21/2020 7:35 PM  #3

    Daze
    Forum Moderator & Bash host 2011

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    From: Kalispell MT
    Registered: 1/24/2013
    Posts: 1,130

    Re: Self tapping leadscrew we’ll sort of

    Bullet Bob wrote:

    Ain't ingin-nuity grand.  Good for you....again....Day.

    BB1

     Thanks. I love problem solving!!!

    If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
       •Thread Starter
     

    11/21/2020 7:53 PM  #4

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
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    Re: Self tapping leadscrew we’ll sort of

    Just so I understand correctly, for me.  I’m not a machinist.

    You made your existing leadscrew into a tap for your brass nuts?

     

    11/21/2020 8:10 PM  #5

    Daze
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    From: Kalispell MT
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    Re: Self tapping leadscrew we’ll sort of

    Nos681 wrote:

    Just so I understand correctly, for me.  I’m not a machinist.

    You made your existing leadscrew into a tap for your brass nuts?

    That’s exactly what I did it was just the tip that never drives the carriage. I use the word “tap” loosely as I was not able to create new threads in a piece of aluminum but it did the job of enlarging the original threads. The nut was .030” to small and now it’s a perfect fit for the leadscrew.
     

    If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
       •Thread Starter
     

    11/21/2020 9:58 PM  #6

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
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    Re: Self tapping leadscrew we’ll sort of

    Nice thread chaser.

    One of my valued tools...is a cheap thread chaser for spark plugs that I bought years ago.

    I’ve made makeshift chasers with bolts and a grinder at work.
    The first time I did it the guys were trying to figure out what i was making.

     

     

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