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  1. #1
    ʇɥǝqıƃpǝɐpʍɐlʇz thebigdeadwaltz's Avatar
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    Cog Removal from Unbuilt Hub

    Alright, I got a nice hub with a cog but it's not built into a wheel. I managed to get the lockring off but I can't get the cog off for the life of me. I tried clamping the hub in a vise with some wood blocks, but still no luck. Any tips?

  2. #2
    hello roadfix's Avatar
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    If it's practical, build the wheel, then remove cog.
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  3. #3
    AEO
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    lace up some spokes into a rim so that they are pulled on when removing the cog.

    you don't need to lace up the entire wheel, nor does it need to be in tension. the hub just needs more leverage to stay put when you're loosening the cog, which is the rim.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
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  4. #4
    I just wanna ride stryper's Avatar
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    try just putting 1 or 2 spokes through the hub to use to prevent the hub from spinning.

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    Senior Member the_don's Avatar
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    SNAP goes your hub. If you are only going to put a few spokes on to attach to a rim, make sure they are on the same side as the cog.

    but, I'd either build the wheel first or just buy a new cog for the time being.

  6. #6
    %#&*#%>?% Build your own's Avatar
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    Put the cog in a vise and use a strapwrench on the hub.

  7. #7
    Pants are for suckaz HandsomeRyan's Avatar
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    Use a plasma cutter to cut the hub away from the cog.


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    Follows my rule of always using brute force when finesse would do...

    Quote Originally Posted by HandsomeRyan View Post
    Use a plasma cutter to cut the hub away from the cog.


  9. #9
    A little North of Hell
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    strapped

    Quote Originally Posted by Build your own View Post
    Put the cog in a vise and use a strapwrench on the hub.
    +1
    [SIGPIC][/SIGPIC]
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  10. #10
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    Quote Originally Posted by the_don View Post
    SNAP goes your hub. If you are only going to put a few spokes on to attach to a rim, make sure they are on the same side as the cog.

    but, I'd either build the wheel first or just buy a new cog for the time being.
    cog will be in the way, cant get any spokes though.

    just do what i did, lace up the opposite side to a rim and proceed to snap your otherwise pristine vintage dura ace track hub in half. looked like 10 pitch, but it had a regular cog. whatever.

  11. #11
    cab horn
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    Who was the smart guy that cut the hub out before removing the cog anyways...?
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  12. #12
    ʇɥǝqıƃpǝɐpʍɐlʇz thebigdeadwaltz's Avatar
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    I got the hub off of eBay, so the seller was the guy that got me into this bind.

    I tried a strapwrench, but that didn't work so hot. Not enough leverage.

    It's a pretty big cog, 20t and it's solid on the sides so I can't get any spokes in that side.

    I ended up clamping it in a vise, holding it with the strapwrench and gave it two bumps with an impact wrench and the cog came spinning off. Cog is a bit dented, but functionally okay. Looks like I'll be building up the wheel tonight!

    Thanks a bunch for all the ideas!

  13. #13
    Gentlemen. ADSR's Avatar
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    OK, so we are going to need pics of this wheel build after the ordeal it was to get the cog loose.
    The bums will always lose.

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