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Thread: Boca Ceramic Bearings - Seal Drag?

  1. #1
    Join Date
    Oct 2017
    Posts
    3

    Boca Ceramic Bearings - Seal Drag?

    Purchased some 50x80 cermamic hybrid axle bearings and after cleaning them as recommended by the Boca sales company rep, were very free and smooth.

    After reinstalling the removable rubber dust shields, the contact of the rubber on the races for sealing definitely adds some rolling resistance but didnt know if this were normal or if modifications were being permormed to free them up.

    Rep said this was normal but any info appreciated.

    -Todd

  2. #2
    Join Date
    Jul 2014
    Posts
    322
    My sons Energy cadet has 30mm Boca ceramic hybrid bearings and the seals have been removed. Because we run asphalt sprint courses we just clean and lube them each day. They are extremely smooth and fast. I just bought 50x80 mm Bocas like yours for one of our full size karts. The seals do seem to add a lot of drag, I will probably remove them as well.

  3. #3
    Join Date
    Dec 2013
    Location
    San Antonio, Texas
    Posts
    778
    I've always run without seals, it makes a big difference, but I flush mine every time the kart comes off the track.
    Just part of the routine between heat races.

  4. #4
    Join Date
    Nov 2013
    Location
    Charlotte, NC
    Posts
    204
    We have 50 x 80 mm axle bearings in stock, 3 set screws, flush back, metal
    shields, do not contact, extra free at a very low price.

    If you have rubber seals on axle bearings they should be
    non contact type.

    Richard King
    Speed Karts
    704-334-0105

  5. #5
    Join Date
    Oct 2013
    Posts
    1,256
    The rubber seals don't make enough drag to make a difference with anything. What they will do is keep your expensive bearings clean, lubed and shinny for many races. If you run with no seals your bearings will get frosted very quickly and make more drag than a seal ever would. Rubber seals on axle bearings is the best thing since sliced bread.

  6. #6
    Join Date
    Oct 2013
    Location
    Mentor, Ohio
    Posts
    787
    Time is better spent elsewhere in between races than working on your bearings in my opinion. Bearings should not even be a weekly maintenance item on asphalt. Run seals. If they have drag get a different bearing because not all have drag.

  7. #7
    Join Date
    Mar 2016
    Posts
    402
    It's so sad seeing how people treat bearings. You take the seals off and the bearing is ruined within a lap. Do not care what surface you are on. They are done and you significantly reduced their life and performance.

  8. #8
    Join Date
    Jul 2014
    Posts
    322
    Our BOCA's didn't have seals when I bought the chassis with one race on it. We have run the whole season with them, with no seals and they are as smooth and as fast as ever. These are the first ceramics I have used, and I am sold on them for life. I was hesitant to think they would last, but I am a believer now.

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