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  1. #11
    RXP 260 X Short Course Veteran RXP244's Avatar
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    You guys just need to find a machine shop that can do this. I had it machined first, then splines cut by another shop and then back to the guys that supplied the steel for treatment.
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  2. #12
    DSR's Avatar
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    Hi RXP244,

    Yup, I've got a couple shops in my area that can do it from start to finish. I'll be sending them both prints of what I need later today and we'll see what they come up with regarding cost and time frame.

    Thanks,
    Dave

  3. #13
    RXP 260 X Short Course Veteran RXP244's Avatar
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    The right material is the key!!

    Quote Originally Posted by DSR View Post
    Hi RXP244,

    Yup, I've got a couple shops in my area that can do it from start to finish. I'll be sending them both prints of what I need later today and we'll see what they come up with regarding cost and time frame.

    Thanks,
    Dave

  4. #14
    DSR's Avatar
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    I agree 100%. I'm going to have both shops quote the job using 17-4 stainless vs. Aquamet and see what they come up with. Although Aquamet would be kinda overkill for the application, if the price difference isn't huge, it would be my preference......

  5. #15
    I'm dealing with a Spark driveshaft that's a Rockwell 30 in the middle and hardened to a Rockwell 60 on each end. Magnetic stainless steel. I need a much longer shaft than OEM.
    Its the rounded splines Seadoo uses that's the problem for most local machine shops. I have a few other leads...waiting for call backs.

    Dirt tricks, our sponsor, will do it, but its a major undertaking with there current machines and setup. I told them I would look around first.

    I guess this guy (op) doesn't check his thread much?

  6. #16
    RXP 260 X Short Course Veteran RXP244's Avatar
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    I have been putting upwards of 400hp through that driveshaft and I can tell you that it ain't stainless. A few years back we made some stainless extended driveshaft for the old RXP platform, had them all hardened etc and broke them all. That's why I sort a better steel option.

  7. #17
    DSR's Avatar
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    Hi RXP244,

    Sounds like you have not only been there and done that, you got the hat and t-shirt to boot!
    I'm not planning on that much power right now, but you never know what the future holds, so if you have suggestions regarding materials and heat-treats that are working for you and be willing to share that info, I'm all ears and would greatly appreciate the help.

    Thank you sir!
    Dave

  8. #18
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    Hi RideH2O,

    I wasn't familiar with the Seadoo shafts, so I googled them....
    YIKES!! I've got some machining experience so I got to ask a rhetorical question.....WTF were they thinking when they came up with that?!?!?
    Do the couplers require that the splines be shaped like that I assume?

  9. #19
    Quote Originally Posted by RXP244 View Post
    I have been putting upwards of 400hp through that driveshaft and I can tell you that it ain't stainless. A few years back we made some stainless extended driveshaft for the old RXP platform, had them all hardened etc and broke them all. That's why I sort a better steel option.
    What kind of steel are you using?
    I'm not stuck on using the exact same material as Seadoo....
    And my project will only have 130hp max.

    I was thinking (on the OEM shaft) that hardening on the ends and leaving the middle was to keep the splines from stripping and leaving a little bit of torsional flex in the middle.
    There is no rubber cushioning on a Seadoo Spark, its crank to spline and spline to impeller. But that's me probably thinking too much...lol

  10. #20
    RXP 260 X Short Course Veteran RXP244's Avatar
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    [QUOTE=RIDEH2O;2938204]What kind of steel are you using?
    QUOTE]

    A certain tool steel with very specific hardening processes and nitrided for a little corrosion resistance.

    Absolutely the only way to go in my opinion.


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