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  1. #1
    Senior Member javashane's Avatar
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    Sealed bearings into a cup and cone bb?

    Hey all,

    I'm working on building up my first project and had a bottom bracket question. I'm new at this, so this may not make much sense...

    I got a good deal on a cup and cone loose-bearing sugino 75 bb off of ebay. I had wanted to go with a shimano, but this one matches my crankset and should give a perfect chainline. I'm in boston, where the weather can almost as crazy as the amount of salt and sand they throw on the streets.

    I was wondering, can I buy sealed bearings to replace the loose bearings/retainer that I have now? I have a feeling that if I don't, I'll be servicing the bb a lot. And if I can't, how much grease to use? I recieved the thing with gobs of it in there. I always thought that it should just be a light coating...

    Thanks!

    -java

  2. #2
    Svr
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    Senior Member Svr's Avatar
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    To install sealed cartridge bearings would require extensive modification of both the cups and spindle. Not worth it.

    Grease? You can never use too much. When it begins to ooze out of the space between the cup and spindle you know you've used enough.

  3. #3
    Senior Member Matt Gaunt's Avatar
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    You can only really use sealed bearing BBs with cranks designed for that purpose as the spindle is often part of the RH crank arm/rings.

    +1 for the amount of grease Svr recommends. Especially in salty areas, I would coat every last bit of exposed metal with the stuff. You can wipe grease off and reapply it, different story with rust.
    Matt
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  4. #4
    Senior Member javashane's Avatar
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    Ah, ok. Thanks all!

  5. #5
    Senior Member
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    Again reinforcing the grease recommendation. Too much is barely enough. You want the excess to ooze out so it forms a bit of a seal that way.

    Also, you can get a corregated plastic sleeve that goes into the bottom bracket shell between the cups and helps keep crud and water away from the bearings. These things are less than $1 at almost any LBS.

    Use the Suguino and when it dies, then get a sealed bb.

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