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Thread: Oversized Wrist Pins

  1. #11
    Join Date
    Nov 2010
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    283

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    Tom; I bought the piston knurling machine and quite few other interesting tools from an old automotive machine shop that was going out of business 25 years ago. I asked the old guy if it really was a good idea to reuse the pistons? He told me that the knurled pistons retain oil in the skirts and reduce the wear on the pistons and cylinder. He was selling out because his son ( that was to take over the business ) had lost a lot of the co. money to his coke habit.
    Craig

  2. #12
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
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    4,832

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    Its my favorite kind of tool, Craig!

    Historical, and full of mystery.

    ....Cotten
    PS: I tried it Folks,..

    Pulling the piston skirt against the flat of my chuck with a draw bar.

    But I always sucked at knurling anyway.
    Last edited by T. Cotten; 07-30-2020 at 04:32 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  3. #13
    Join Date
    Nov 2010
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    283

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    Tom; The chuck on the machine does not spin 360 deg., but rocks left to right. It has a micro feed ( seen to the right of the forward extended arms ) so you know exactly how much you are bringing out.
    Craig

  4. #14
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
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    4,832

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    Quote Originally Posted by 41craig View Post
    Tom; The chuck on the machine does not spin 360 deg., but rocks left to right. It has a micro feed ( seen to the right of the forward extended arms ) so you know exactly how much you are bringing out.
    Craig
    I wish I could fondle it, Craig!

    360 would be pointless, as only the thrust faces are involved.

    Some had die-springs to apply the knurling pressure, but extinct no doubt.

    ...Cotten
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

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