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Thread: Shimano BB bearing replacement tools

  1. #1
    Supporting Member mattthemuppet's Avatar
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    mattthemuppet's Tools

    Shimano BB bearing replacement tools

    made a set of adapters to press the bearings out of Shimano outboard bottom brackets and press in off the shelf cartridge bearings. A) because I'm cheap and b) because I can

    making the doodad to press the bearings in - first trepanned a chunk of alu to make some custom spacers for the bottom bracket


    then turned down the stub


    then parted off from the chunk


    pressing out the old bearings. Used a piece of black iron tube to hold the shell and some random steel as the pusher. One of the shells needed the ID opened up to get to the back of the old bearing


    pressing the new bearing in


    finished job


    collection of parts (inc. new spacers and old plastic ones)


    the bearings spin much more freely than the old ones, even when they were new, and I got 10 decent ones (Abec 5 supposedly) off Aliexpress for $16, so I can do the bearings on my other bike and still have 3 sets left over!

  2. The Following 3 Users Say Thank You to mattthemuppet For This Useful Post:

    DIYer (11-24-2016), Jon (11-25-2016), Paul Jones (11-25-2016)

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    Thanks mattthemuppet! We've added your Outboard BB Press to our Bicycle category,
    as well as to your builder page: mattthemuppet's Homemade Tools. Your receipt:





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