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Thread: Spline cutting work offered for once-off job

  1. #61

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    My gut says if you've made the shaft brittle enough that you can't take that bend out in a press it's not going to serve well as an axle shaft at all....

  2. #62

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    Quote Originally Posted by JCByrd24 View Post
    My gut says if you've made the shaft brittle enough that you can't take that bend out in a press it's not going to serve well as an axle shaft at all....

    I am thinking Cam shafts also need to be straightened and these are extremely brittle, yet there are youtube's of a guy hitting it with a mallet to straighten a few thou out of the thing.

    If he can hit a cam shaft with a mallet I can most likely press 20 thou out of mine.


    However bending in a press will be extremely time consuming also --

    Are these the steps I should follow??? ---


    1. Deflect 0.1"
    2. Relax
    3. Rotate and check run-out if bending took place.
    4. Deflect 0.2"
    5. Relax
    6. Rotate and check run-out if bending took place.
    7. Deflect 0.3"
    8. Relax
    9. Rotate and check run-out if bending took place.
    ....
    ....
    ....
    82. Deflect 2.7"
    83 ***SNAP*** <=== don't want to get here!

  3. #63

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    It'll go quicker than you think. I've straightened only a couple of shafts in my press but neither took more than a few minutes.

  4. #64
    Join Date
    Sep 2008
    Location
    Mid-Michigan USA
    Posts
    129

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    I'm very late to this thread and will admit to not reading it completely.
    I'll also grant this has nothing to do with your question....but.
    I think you picked the wrong material, a better choice would have been 4340M
    aka. 300M. And then had the splines induction hardened not the whole shaft.
    If it's 60 rc all the way through it....not good.
    Sorry
    Dave

  5. #65

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    Quote Originally Posted by JCByrd24 View Post
    It'll go quicker than you think. I've straightened only a couple of shafts in my press but neither took more than a few minutes.

    The problem is that the stress-strain curve of hardened D2 ends very quickly -- there is very little plastic range.

    With a soft shaft, if you over-bend it, the worst that can happen is having to flip it over and bend it the opposite way.

    With hardened D2 if you over-bend it, then it will snap.


    This is all my guesswork since I have zero experience working with D2, but below is the stress strain curve -- it ends abruptly.

    Ok, I have ordered V blocks on Amazon.

    Any advise before I leap?



  6. #66

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    Quote Originally Posted by Dave P. View Post
    I'm ...
    why "not good"?

  7. #67
    Join Date
    Jan 2013
    Location
    Michigan
    Posts
    1,240

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    Anyone named "paulsheer" ought to be extra careful when using a press to bend hardened steel.

  8. #68
    Join Date
    Mar 2008
    Location
    High, Wide and Handsome, Montana
    Posts
    918

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    Yeah, I think hardening the entire shaft was not ideal.
    I would run them as is and see if there is a problem with vibration (or breakage), and go from there. May be a moot issue.
    I didn't see what kind of Jeep, but 100 mph is a stretch, and there is a lot of other wonky stuff going on at hwy speeds on a Jeep.

  9. #69
    Join Date
    Dec 2004
    Location
    East Coast, USA
    Posts
    5,402

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    Yea, is this for a "Jeep" or a "Jeet"
    Work hard play hard

  10. #70
    Join Date
    Apr 2017
    Location
    Kelowna BC
    Posts
    994

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    I dont know, we been working on a well designed truck with lift and tilt.
    If it will not drive fine at 90 mph then they failed to meet the goal.
    So far all the versions have been capable of that speed. The latest is a 2017 F 150, and has 44 or 46 inch tires , over 21 Inches of diff clearance, and feels like a stock truck at highway speeds.
    So I say yes, not too much to ask..

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