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Gettin Shafted!

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01 / Original postGettin Shafted!smdO2 · 7 Dec 2004 02 / This pagePosts 1–9Page 1 of 1 · chronological order 03 / Latest replyPost #9smdO2 · 10 Dec 2004

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rec.sport.unicycling
Published
7 December 2004
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10 December 2004
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smdO2
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  1. Original post
    smdO2
    Archived post
    #1

    Hi

    I recently ordered a Kh20 trials, for a friend named Kirk (he doesn’t
    have internet access) from municycle.com and received it last Friday.

    The day we received it, we noticed this clicking, the shaft moving
    inside the hub – the dreaded keyway slop.

    I informed Roland (at municycle.com) about the problem, and he asked if
    we could repair it ourselves, because we live in South Africa, and he in
    Germany so it would cost a lot and take time to ship back and forth.

    I’ve spoke with Kirk and explained the situation, and what I’ve read up
    on this (what seems to be a common) problem. And after all this felt a
    bit more at ease. And decided to go ahead with the retaining compound
    repair (as explained by john in a previous thread).

    Last night we stripped the shaft out of the hub, and were actually
    appalled, at the condition of the shaft and very bad engineering. The
    shaft is far from a press fit, and there is what seems to be two “tack”
    welding marks on two sides of the shaft in-between the keys, as a lame
    attempt to try widen the shaft to fit in the hub. Some of the keys are
    badly scratched and dented/pitted.

    The shaft slides easily (with lots of play) into the hub until reaching
    the welding marks. On the inside of the hub on the area that touches the
    welding the aluminium is all scratched.

    We doubt the retaining compound (made by Cat Earthmoving Equip.) we’ve
    got will fill the size gap. (Kirks got the parts at work today to
    accurately measure the difference)

    After seeing all this, Kirk (and myself) are obviously not very pleased
    with just repairing it and don’t think its right to have a brand new
    part in such condition.

    Do all the 2004 KH hubs look like this inside?

    Have a look at the attached photos, and let us know what you think.
    What do you think we should do? What would you do if this was your
    hub?

    In one of the posts from Kris Holm, mentioned trying to repair this
    problem with epoxy or whatever will not affect the warranty of the part.
    What is the warranty and how long does it last?

    Thank
    Shaun (&Kirk)

    +----------------------------------------------------------------+
    | Attachment filename: shaft.jpg |
    |Download attachment: http://www.unicyclist.com/attachment/254029|
    +----------------------------------------------------------------+

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  2. smdO2
    Archived post
    #2

    Picture of the hub

    +----------------------------------------------------------------+
    | Attachment filename: hub close up1.jpg |
    |Download attachment: http://www.unicyclist.com/attachment/254030|
    +----------------------------------------------------------------+

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  3. smdO2
    Archived post
    #3

    Welding on the shaft

    +----------------------------------------------------------------+
    | Attachment filename: welding on shaft.jpg |
    |Download attachment: http://www.unicyclist.com/attachment/254031|
    +----------------------------------------------------------------+

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  4. mango
    Archived post
    #4

    YIKES. I would ask roland to take a look at those pics and see what he
    thinks. Those keys/keyways dont look happy. Good luck.

    --
    mango - unity - as 1 stand together

    http://www.unicyclist.com/gallery/albuv16

    "I wet myself every time I get near a handrail now" -bevan
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  5. johnfoss
    Archived post
    #5

    Wait until you hear from someone with hands-on experience with this
    problem, but it looks like your hub may be too far gone to repair and
    make it ride-worthy. If this turns out to be the case, you should
    communicate with Municycle.com on what to do. They owe you a working
    hub, but shipping/duty costs are high. If your current hub is really
    bad, they might just ship you a new one. But then again they probably
    need the bad one to get refunded themselves.

    Looks like some manufacturing defects, and the usual assumption "back at
    the factory" that somehow nobody's going to ride one of them one-wheeld
    thangs, so why should it need to be strong? 🙄

    --
    johnfoss - Walkin' on the edge

    John Foss, the Uni-Cyclone
    "jfoss" at "unicycling.com" -- www.unicycling.com

    "It's good to find something that makes boys into men and men into boys,
    my opinion is that unicycling fits the bill." -- Lloyd Johnson

    "Read the rules!" -- 'IUF Rulebook'
    (http://www.unicycling.org/iuf/rulebook/) -- 'USA Rulebook'
    (http://www.unicycling.org/usa/competition/)
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  6. GILD
    Archived post
    #6

    shaun, have u sent the pics thru to roland yet?

    --
    GILD - Waffle-[censored] and Time-bider

    if you can't say anything good about someone, sit right here by me.--
    alice 'roosevelt' (http://tinyurl.com/5ngze) longworth
    I feel like a fugitive from the law of averages.-- William H.
    Mauldin
    'NAMASTE!' (http://tinyurl.com/4qcxw)
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  7. smdO2
    Archived post
    #7

    Thanks for the input guys.

    Ya, sent and email to roland just before i posted this thread, with
    these and other pics attached.

    He did email me back, saying he will contact his distributor, And i
    musnt worry they will find a solution, and will let me know ASAP

    He didnt comment on the pictures, or wether we should go forward with
    the repair or hold on.

    Just incase you take this the wrong way, Im not trying to put Roland
    down or anything, I have order other parts previously and my Quax for
    him, he offer excelent sevice, speedy delivery and my Quax hasnt had any
    problems whatsoever.

    Just wanted to find out if all the kh hubs with the keyway problem, look
    like this or if this is a bigger problem.

    Quoted message said:

    Wait until you hear from someone with hands-on experience with this
    problem

    So is there anyone outthere that could tell me, is this more of a
    problem than the "standard" keywayslop problem. and do all the shafts
    have these "welding" marks on them?....Roger....Darren....Kris... anyone
    else?

    Thanks
    Shaun (&Kirk)

    --
    smdO2 - UniT is One
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  8. john_childs
    Archived post
    #8
    smdO2 said:

    *

    So is there anyone outthere that could tell me, is this more of a
    problem than the "standard" keywayslop problem. and do all the shafts
    have these "welding" marks on them?....Roger....Darren....Kris...
    anyone else?
    *

    I have never personally taken a KH hub apart, much less one of the hubs
    from that faulty batch that had so many slipping axles. I can't say if
    that welding fix was used on other faulty hubs or not. It was not what
    was done on the good hubs. Steve Howard has some pictures of the good
    axle in his gallery. See the 'Dissected KH Hub gallery'
    (http://gallery.unicyclist.com/KH_hub). And there are no weld marks on
    that axle.

    I'm frankly a little shocked that they would try to salvage that hub by
    making those weld marks to attempt to make it fit tight. Yikes. It's
    not clear whether the axle was machined too small or the hole in the hub
    body was machined too big. Or maybe a combination of both.

    If the axle slips in the hub body with no resistance (until it gets to
    the weld marks) then it's going to be too loose of a fit to salvage with
    Loctite. Loctite can't fill that big of a gap considering the forces
    that are put on a hub. Some extra heavy duty super strong epoxy might
    work. But I would not be willing to go that route on a hub with that
    much slop because I doubt the epoxy would hold long term, or even short
    term, with hard riding.

    --
    john_childs - Guinness Mojo

    john_childs (at) hotmail (dot) com
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  9. smdO2
    Archived post
    #9

    So, Roland let us know yesterday that he will, check all his KH stock,
    and if he has one with out this problem, he will send Kirk a new
    wheel.

    If all his stock has this problem, he will organise a hub&shaft with out
    the problem & build us a new wheel.

    Last night we tried to fix it temporarily with retaining compoud, so
    Kirk can ride atleast.
    Tonight we will see if the temp fix has worked.

    later
    Shaun

    --
    smdO2 - UniT is One
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