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  1. #1
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    Problem with hex on front MIP X-Duty CVD's

    Hi everyone!

    I wonder if anybody else have the same issue with the hexes on the front MIP's. The problem is when tightening the wheel nut, the hex slides inward on the axle and compresses the bearings so that the wheel can't spin freely.
    No matter how hard I tighten the set screw on the hex, it won't prevent it from being pushed inward when tightening the wheel nut. I'm sick and tired of stripping grub screws.
    The axles are so hard that the set screws barely put a mark in them.
    On the rear I have no problems, probably because of the spacers in between the bearings.

  2. #2
    RC Champion soundmaster's Avatar
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    I also have MIPs all around but no issues.

    Are the bearing all good?

    are hexes installed the right way?

    Post some pics or video. Maybe i can help then.
    Last edited by soundmaster; 09-29-2013 at 12:55 PM.

  3. #3
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    Use a Teflon washers between the hex and bearing. And I second what soundmaster said about hexes installed facing the right way.
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  4. #4
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    And use good tools and blue thread lock too dude.........peace
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  5. #5
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    Its a spacer between bearings issue, 2 buddy's had this issue until we bought and used the washers for hex between bearings, think we used 3. what happens is as your running the bearings squish giving play on the hex like a loose axle nut, next thing youe wheels are damaged......

    On the last set we have I use the original pin type MIP X-duty
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  6. #6
    RC Champion soundmaster's Avatar
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    I run my MIPs without any washers and have no issues. They work perfectly fine in front and rear.

  7. #7
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    i believe the mip keyed hex can only go on one way correctly. the hex has a built in spacer. i had assembled mine incorectly the firt time. i could be wrong though lol

  8. #8
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    Thank you all for your feedback
    Checked my bearings again - all good.
    Hexes mounted the right way - checked.
    Blue Loctite on set screw - checked.
    Teflon washer between bearing and hex - checked. Well hello there... The teflon washer had deformed a little under the pressure from the wheel nut. The washer put a little pressure on the rubber seal on the bearing - probably enough to make it touch the bearing balls.
    I removed the teflon washer and put it all together again - the front wheels now spins a lot better. Strangely enough the right front wheel spins more freely than the left one. Could be it will free up after a couple of runs?

    Once again, thank you all for your advice. It made me doublecheck everything again

  9. #9
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    Besides what you have already done, did you put that black plastic spacer (provided with MIP axle kit) inside the bearing carrier between bearings?

  10. #10
    RC Champion soundmaster's Avatar
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    Quote Originally Posted by kcollins812 View Post
    Besides what you have already done, did you put that black plastic spacer (provided with MIP axle kit) inside the bearing carrier between bearings?
    This spacer is metal not plastic

  11. #11
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    Quote Originally Posted by kcollins812 View Post
    Besides what you have already done, did you put that black plastic spacer (provided with MIP axle kit) inside the bearing carrier between bearings?
    To my knowledge there are no spacers between the bearings on the front axles, only on the rear ones. At least there where no spacers included in the set when I bought it. But please, correct me if I'm wrong.

  12. #12
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    Update on front MIPS:
    I contacted Matt at MIP and he believed to have a solution for me. He sent me new axles, part #10133.
    When comparing the old with the new axles I noticed that the new axles have 0.25mm wider spacing between the inner and outer bearing. After installment and testing I can report that the front wheels now spin freely, and everything is working perfectly.
    MIP = excellent customer support.

    One more thing: The hexes now have 1.5mm set screws instead of the old 1/16".
    Last edited by Viking; 10-24-2013 at 12:31 PM.

  13. #13
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    Glad to see it was fixed by them quickly. New MIP keyed hexes only have the set screw to keep the hex from falling off when taking the wheel off. They are not supposed to be super-tight.

    The small black bearing spacers included with the rear axles go between the bearings. When installed properly, there are no gaps from the axle flange, through the bearings, to the hex, wheel, and locknut. There's no significant horizontal force pressing the inside of the bearings out either. It's a really good design that helps keep the axle straight, increasing bearing life. Adding shims to the newer MIP axles will not help. When installed properly, they work great and last forever.

  14. #14
    RC Turnbuckle Jr. spenniepoos's Avatar
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    That's why I am a massive mip fan because of the products and customer service ......peace
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    So I installed my Mip's today and had the exact same problem! The front kit did not come with any metal spacers like the rear?!?!? I have RPM caster/sterring blocks on the front and rear. The wheels do not spin freely but the rear is perfect. Do I have a defective kit? I know they are installed correctly as they came with detailed instructions and lots of youtube and Traxxas forum. Any other suggestions? I have checked all the above stuff that you guys have mentioned.....

  16. #16
    RC Turnbuckle Jr. Jezza's Avatar
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    Quote Originally Posted by Seeehorn10 View Post
    So I installed my Mip's today and had the exact same problem! The front kit did not come with any metal spacers like the rear?!?!? I have RPM caster/sterring blocks on the front and rear. The wheels do not spin freely but the rear is perfect. Do I have a defective kit? I know they are installed correctly as they came with detailed instructions and lots of youtube and Traxxas forum. Any other suggestions? I have checked all the above stuff that you guys have mentioned.....
    You have just revived an old post.

    How ever re check again. I dont remebre if its the front or rear but in between the two bearings you also have a spacer simmilar to the bearing crashers for the rear.

    I also use the traxxas shims at the front.

    You have other questions regarding your truck that you cannot find an answer for . Post a new thread for your questions
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  17. #17
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    Quote Originally Posted by Jezza View Post
    You have just revived an old post.

    How ever re check again. I dont remebre if its the front or rear but in between the two bearings you also have a spacer simmilar to the bearing crashers for the rear.

    I also use the traxxas shims at the front.

    You have other questions regarding your truck that you cannot find an answer for . Post a new thread for your questions
    I did not receive any spacers for the fronts only the rears! Maybe I'll try some shims from Traxxas. Thanks for your help!

  18. #18
    RC Turnbuckle Jr. Jezza's Avatar
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    Quote Originally Posted by Seeehorn10 View Post
    I did not receive any spacers for the fronts only the rears! Maybe I'll try some shims from Traxxas. Thanks for your help!
    Have a look at it again, in the front the shims are not necessary but the spacer in between the two bearings is. I dont have any shims betwwn the hex and the front bearing.

    http://miponline.com/store/media/myi...nst-01-466.pdf
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  19. #19
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    That's the rear where that spacer is needed. Yes the front doesn't come with shims or spacers because the inner bearing is bigger then the outer bearing. Now the rear set comes with two different size spacers. I used the thicker of the 2 only on the rears. On the fronts I don't have shims nor spacers. I'm wondering since your using rpm parts of the Mips are rubbing on the front knuckles causing it to drag. I know on some aftermarket parts Mips don't work well and causes this. Have you tried to put the smaller spacer on the fronts. Where it would be at is inside. So remove stub axle out of the knuckle put the spacer in and put back through both bearings. It won't be touching the inner bearing but I'll be between the outer bearing and axle. Pushing the axle inward.
    I ran 2 full sets all around and didn't have a problem with the fronts

    Edit: Nevermind about the smaller spacer up front. That won't work. All it's gonna do is give the axle play. I just put a front together from spare parts. With traxxas knuckles it barely has room to move when the axles are angled
    Last edited by Er33; 07-26-2015 at 10:08 PM.

  20. #20
    RC Turnbuckle Jr. Jezza's Avatar
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    Infact on their site that is what is shown. I have to look into my slash if I still have the instructions....I must have forgotten something, but mine has no problems, how ever I did shim it as I thought it would be better instead of having my hex or the bearings wear out on me.....
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  21. #21
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    Right it shows both front stub and rear stub. On the rear it shows the spacer. You can see the bearings being same size

    Rear
    http://miponline.com/cgi-bin/sc/ss_m...2333044efe6693

    Fronts
    http://miponline.com/cgi-bin/sc/ss_m...ee845214dc312b

  22. #22
    RC Turnbuckle Jr. Jezza's Avatar
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    Quote Originally Posted by Er33 View Post
    Right it shows both front stub and rear stub. On the rear it shows the spacer. You can see the bearings being same size

    Rear
    http://miponline.com/cgi-bin/sc/ss_m...2333044efe6693


    Fronts
    http://miponline.com/cgi-bin/sc/ss_m...ee845214dc312b

    Do you remembre if the rubber shims was for the front or rear.....
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  23. #23
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    Quote Originally Posted by Jezza View Post
    Do you remembre if the rubber shims was for the front or rear.....
    I don't remeber mine coming with rubber shims. The rear came with a 1mm metal and 2.25mm metal spacers. I used the larger for the rears only. The small one is in the parts bin.

  24. #24
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    Quote Originally Posted by Seeehorn10 View Post
    So I installed my Mip's today and had the exact same problem! The front kit did not come with any metal spacers like the rear?!?!? I have RPM caster/sterring blocks on the front and rear. The wheels do not spin freely but the rear is perfect. Do I have a defective kit? I know they are installed correctly as they came with detailed instructions and lots of youtube and Traxxas forum. Any other suggestions? I have checked all the above stuff that you guys have mentioned.....
    Hi, there!
    Nice to see that you're searching for a solution before you post a question.

    I run the Traxxas alu parts on the front, and I haven't tried the RPM set. Generally, RPM plastic is quite soft, so it may wear itself to a better fit (but if it really binds - don't overheat your motor and ESC!). That being said, I have never had any fitment problems with all the other RPM parts I have installed.
    The front MIP kit doesn't come with any spacers. Does the binding get worse when you tighten the wheel nut? Are you sure it's not binding between the edge of the MIP male bone and the RPM steering block. Does it bind equally when you compress the shock, or is it worse at full droop? Do you run a lot of negativ camber on the front?

    As Jezza said, maybe you should post a new thread regarding your RPM/MIP issue.
    But it's nice to see an old thread coming to life again!
    Last edited by Viking; 07-27-2015 at 03:11 AM.

  25. #25
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    Quote Originally Posted by Viking View Post
    Hi, there!
    Nice to see that you're searching for a solution before you post a question.

    I run the Traxxas alu parts on the front, and I haven't tried the RPM set. Generally, RPM plastic is quite soft, so it may wear itself to a better fit (but if it really binds - don't overheat your motor and ESC!). That being said, I have never had any fitment problems with all the other RPM parts I have installed.
    The front MIP kit doesn't come with any spacers. Does the binding get worse when you tighten the wheel nut? Are you sure it's not binding between the edge of the MIP male bone and the RPM steering block. Does it bind equally when you compress the shock, or is it worse at full droop? Do you run a lot of negativ camber on the front?

    As Jezza said, maybe you should post a new thread regarding your RPM/MIP issue.
    But it's nice to see an old thread coming to life again!
    Thank you all for your help and support! Do I have the wrong part? The instructions that you guys provided looks different then what I have?!?!?! part#13105

    I have these: http://miponline.com/store/media/myi...-01-130_p1.jpg

  26. #26
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    You don't have the "wrong" part, but since we are mainly bashers we assumed you bought the X-Duty shafts (#11110 or #10132, the latter being for the Slash 4x4 but identical).
    The ones you have are more for racing, and limited to 2S batteries. They are also nowhere near as strong as the X-Duty's, but they use the same stub axle and shouldn't give you fitness issues.

  27. #27
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    Well that sucks lol! I dont plan on racing but definitely will be bashing guess i'll just pick up the other ones.... Noob mistake here..

    Thanks Again

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