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  1. #1
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    57
    Posts
    2,527

    Default Using a Dynabolt for an expanding tool

    The other day I had a need for a puller to remove a blind pilot bearing from a crankshaft.
    For plain bushes I normally just pack the bore and use a close fitting punch to hydraulic the bus out - but this one was a needle roller bearing with a closed back.






    After a quick head scratch I ended up with this arrangement to expand behind the needle rollers of the bearing.
    I used the inner part of 10mm dynabolt to do the expanding. They are a decent grade of steel and already have a thread on one end and a taper on the other.
    I didnít even bother to match the taper on the matching part of the tool - just made decent 45deg internal chamfer.

    Same concept could be used for various other expanding grip applications.






    Steve

  2. #2
    Join Date
    Aug 2010
    Location
    Toorloo Arm, VIC
    Age
    39
    Posts
    1,221

    Default

    I like it. But I think your surface plate has seen better days....

  3. #3
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    57
    Posts
    2,527

    Default

    Thankfully itís only a floor lamp base!
    Iím rough, but not THAT rough

    Steve

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