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Technical Banjo axle thread repair help

Discussion in 'Traditional Hot Rods' started by novaskilling, Oct 7, 2021.

  1. novaskilling
    Joined: Jul 8, 2018
    Posts: 149

    novaskilling

    Picked up my 40 banjo rear and one axle end has damaged threads, is there anyway to repair this?

    thanks Chris
     

    Attached Files:

  2. I can't remember the size off the top of my head, but I'm sure someone makes a die to fix those threads because I had to buy one a few years ago because I had the same problem.

    5/8-18 I THINK, you should verify before purchase.
     
  3. novaskilling
    Joined: Jul 8, 2018
    Posts: 149

    novaskilling

    Thank you very much! I’ll confirm the size
     
  4. Andy
    Joined: Nov 17, 2002
    Posts: 5,117

    Andy
    Member

    I would just grind the damaged part off. Do not try to thread a die on it. It will go on crooked and ruin the axle.
    I can retread just the damaged part with a split adjustable die. I start from the good threads and move outward.
    I would be happy to do it for free. Where are you?
    Ps, The threads are special close tolerance threads due to the high load put on them.
     
    Last edited: Oct 7, 2021

  5. vtx1800
    Joined: Oct 4, 2009
    Posts: 1,709

    vtx1800
    ALLIANCE MEMBER

    The threads you show are worse than the ones I needed to repair but this is what I did, I took a nut, sliced it in half and welded it to a vise grips to make a pseudo tool to straighten the threads on a Dana 44 axle, I'd use a file first to clean them up a bit and the fact that the damaged threads are outside of the cotter pin hole means there shouldn't be a strength issue.. IMG_3463.JPEG
     
  6. Nice work!
     
    46international and seb fontana like this.
  7. hemihotrod66
    Joined: May 5, 2019
    Posts: 968

    hemihotrod66
    Member

    Try to find yourself a thread file....Looks like the school of hammerolgy on the end of the axle....
     
    SS327 likes this.
  8. xix32
    Joined: Jun 12, 2008
    Posts: 593

    xix32
    Member

    That's a 5/8-18 thread, don't try to run a die on from the outside. It's way too easy to cross thread it.
    Rather grind a vee in one side of a die and hold it in a vise, hit it with a hammer to break it in half, it will fit back together nicely. Then place it together on the inside ( good) part of the threads, then put the holder on over the die to hold it together, then turn it off ( not on) to fix the bad thread area.
    5:8"-18 die.JPG
     
  9. oldsman41
    Joined: Jun 25, 2010
    Posts: 1,556

    oldsman41
    Member

    Gee I’ve seen worse if you have a thread file or can get one start with that, than you should be able to do a die on it to clean it up. If you have a good ace hardware take it down there and they should be able to help you with the sizing.
     
  10. oldsman41
    Joined: Jun 25, 2010
    Posts: 1,556

    oldsman41
    Member

    32 has a great idea right there
     
  11. Petejoe
    Joined: Nov 27, 2002
    Posts: 12,264

    Petejoe
    Member
    from Zoar, Ohio

    What a great idea XIX32!
    Never thought of doing that.
    This is why the hamb is so great.
    Full of people who fix shit not replace it.
     
    Truckdoctor Andy, Wanderlust and Tman like this.
  12. Doublepumper
    Joined: Jun 26, 2016
    Posts: 1,534

    Doublepumper
    Member
    from WA-OR, USA

    You may want to see if one of these is available from a tool rental outfit.
    thread chaser.jpg
     
    Truckdoctor Andy and Carter like this.
  13. birdman1
    Joined: Dec 6, 2012
    Posts: 1,591

    birdman1
    Member

    Thread file, every GOOD mechanic has at least two

    aa
     
    Truckdoctor Andy likes this.
  14. novaskilling
    Joined: Jul 8, 2018
    Posts: 149

    novaskilling


    Thanks so much for the advice and the offer to help, I’m in Canada so we’re a little far apart haha. I did find a vintage axle/spindle tool that has multiple thread chasers built in that splits in half. Picking it up tomorrow and will give it a go!
     
    dwollam likes this.
  15. novaskilling
    Joined: Jul 8, 2018
    Posts: 149

    novaskilling

    brilliant!! Thank you for the idea!
     
  16. Doublepumper
    Joined: Jun 26, 2016
    Posts: 1,534

    Doublepumper
    Member
    from WA-OR, USA

    When you need them, they are indispensable.
    thread files.jpg ;)
     
    Truckdoctor Andy likes this.
  17. 51 mercules
    Joined: Nov 29, 2008
    Posts: 3,868

    51 mercules
    Member

    This is what I use! Axle Threading/Re Threading Tool. You can find them on Ebay.[​IMG]
     
  18. I have a couple also, just be careful and take it slow.
     
    Truckdoctor Andy and 51 mercules like this.
  19. Budget36
    Joined: Nov 29, 2014
    Posts: 13,174

    Budget36
    Member

    That’s what I’d do too. The threads that are damaged are just there to start the castle nut. That portion of the castle nut isn’t providing any clamping force, it’s just there to put the cotter pin in and hold it in place in case it were to back off.
     
    Truckdoctor Andy and alanp561 like this.
  20. Aaron D.
    Joined: Oct 27, 2015
    Posts: 1,037

    Aaron D.
    Member

    I would take a Dremel and grind the bad threads off. The nut is further on the axle when it's tight anyway.
     
    Andy likes this.
  21. 19Fordy
    Joined: May 17, 2003
    Posts: 8,025

    19Fordy
    Member

    Last edited: Oct 11, 2021
  22. That’s not a vise grip, that’s a Lever W Wrench. You are the only other person that I’ve ever seen with a pair. My Dad has two pairs, and got them when we lived in Eastern Iowa. Nicely done on your tool!
     

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