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Thread: Drilling Tailwheel Steering Arm

  1. #1
    Captain Ron's Avatar
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    Drilling Tailwheel Steering Arm

    Hi Folks,

    I need to replace the Scott 1140 steering arm. Any hints to make the sure holes I need to drill in the shaft match-up with the rudder? I was thinking of installing the arm, squaring it up, marking the holes and then drilling in a v-block on a drill press. I guess I need to check that the holes in the rudder are square and centered also.

    Cheers,
    Jeff

  2. #2

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    I would have someone center the rudder and get everything lined up and mark the spot than have a friend double check it before drilling. Whoever drilled mine either for some reason purposely drilled it off, or just made a mistake, I need 3/4 inch more chain on one side of my steering spring chains to make the rudder centered with the tailwheel strait.
    Thanks Captain Ron thanked for this post

  3. #3
    www.SkupTech.com mike mcs repair's Avatar
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    square it,.. drill undersize from BOTH sides, then finish to size

  4. #4
    Gordon Misch's Avatar
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    Mike - do you ever then ream to 1/4", with an undersize reamer to get a good fit on the AN bolts? Thoughts???
    Last edited by Gordon Misch; 02-24-2019 at 12:31 AM.
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  5. #5
    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by Gordon Misch View Post
    Mike - do you ever then ream to 1/4", with an undersize reamer to get a good fit on the AN bolts? Thoughts???
    No. Only an3


    Sent from my iPhone using SuperCub.Org mobile app

  6. #6
    Gordon Misch's Avatar
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    Why? Not challenging, just asking - - -
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    1/4 would make it sloppy, if 3/16 hole is tight than maybe filing it softly to fit the an3. slop sucks

  8. #8
    Gordon Misch's Avatar
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    Quote Originally Posted by supercub1999 View Post
    1/4 would make it sloppy, if 3/16 hole is tight than maybe filing it softly to fit the an3. slop sucks
    No, use AN-4 bolts in a properly fitted (slightly undersize) hole!
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  9. #9
    www.SkupTech.com mike mcs repair's Avatar
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    Quote Originally Posted by Gordon Misch View Post
    No, use AN-4 bolts in a properly fitted (slightly undersize) hole!
    depending on which one you have(diameter of aluminum piece) a AN4 hole will be too large in the aluminum part/weaken it.....

  10. #10
    Gordon Misch's Avatar
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    Quote Originally Posted by mike mcs repair View Post
    depending on which one you have(diameter of aluminum piece) a AN4 hole will be too large in the aluminum part/weaken it.....
    Right, that's my concern. Whether it's weakened too much is the reason I inquired about others' experiences.

    But of course, rocking back and forth on the AN3 bolt, if it's loose, will do the same eventually.

    Thanks - -
    Gordon

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    Likes mike mcs repair liked this post

  11. #11
    Captain Ron's Avatar
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    Thanks guys!

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