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  1. #1
    RoadBikeReview Member
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    Tandem Bottom Bracket Question, How to install BB

    I've got the BB out. It consists of a spindle with a sleeve, 2 62030 Sealed bearings, and 2 C-Clips.

    There is no threads on the BB shell. The bearings are pressed into the shell, with the spindle between them, and the C-Clip on the ends to hold them in.

    So getting them out was easy tapping them out with a mallet and punch.
    But to install the BB, it seems I'll need a drift that can fit over the spindle and press on the bearings with damaging them.

    Is this considered an American BMX BB, and what tool do I use for this??

  2. #2
    RoadBikeReview Member
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    Upon further research, this seems to be a proprietary BB from Burley. Shell is 83mm width and I think it was 40mm height. My main concern is once I have the spindle and bearing installed on one side, when I try to punch the 2nd bearing in , the 1st bearing will get punch out. Seems that I need a rod to go through the spindle which is very narrow.

  3. #3
    RoadBikeReview Member
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    Bearings need to be pressed in, or very carefully tapped in, with a deep socket or similar which contacts the outer race only.

    If one side is in with the circlip in place, then a gentle installation of the opposite bearing just far enough that the circlip can be installed should be possible, without doing any damage.

    Grease on the spindle and around the bearings is probably a good idea.

    If you are "punching out" a bearing with the spindle, then that will be doing so via the inner race, which is liable to create damage.
    Last edited by bikerjulio; 07-02-2017 at 05:46 AM.
    We just don’t realize the most significant moments of our lives when they’re happening
    Back then I thought “well there'll be other days”
    I didn’t realize that was the only day
    https://www.youtube.com/watch?v=Y9yrupye7B0

    There's sometimes a buggy.
    How many drivers does a buggy have?
    One.
    So let's just say I'm drivin' this buggy...
    and if you fix your attitude you can ride along with me.
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  4. #4
    RoadBikeReview Member
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    Thanks, I posted this on 2 forums (bikeforums and here) and you're the only one with answer.
    BTW: The spindle has shoulders which pushed on the bearings when coming out. the bearings look to be OK. And yeah I thought to grease these. I don't think they have ever been out. With the spindle installed I don't see any other way that one can get the bearings outs. There's no inner space to pull them, and tapping on the bearing does what I just did. pushing the farther bearing out with the spindle.

    I'm now going to do the socket trick and tap them back in.

  5. #5
    RoadBikeReview Member
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    If you are intending to reinstall the bearings then I'd suggest you check them in your hands. The removal could have damaged them. Depends how much force was needed.
    They should turn nice and smoothly without notchiness or grittiness. New bearings would be pretty cheap.
    We just don’t realize the most significant moments of our lives when they’re happening
    Back then I thought “well there'll be other days”
    I didn’t realize that was the only day
    https://www.youtube.com/watch?v=Y9yrupye7B0

    There's sometimes a buggy.
    How many drivers does a buggy have?
    One.
    So let's just say I'm drivin' this buggy...
    and if you fix your attitude you can ride along with me.
    http://www.youtube.com/watch?v=GekiIMh4ZkM

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