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My Jig Jig for drilling

Discussion in 'Alignment' started by flockshot, Sep 26, 2022.

  1. flockshot

    flockshot Rail Runner

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    After getting the Silver Bullet Extreme I still could not drill perfectly aligned body holes for axles.

    This is my solution:
    upload_2022-9-26_11-13-22.jpeg

    I placed 1-2-3 blocks so that the drill would be slightly toe-in and then used caulking to attach everything down to a steel plate. The harbor freight magnets are just there to steady things as I was testing the set-up.

    Then at the outer most point (4 inches from the SBE) i shimmed both sides for a perfect alignment drill.

    upload_2022-9-26_11-20-57.jpeg
    .
    Then with a piece of wood that works on both sides of the jig, i get exactly identical angles of drill.

    I use a 6 inch #43 bit to do the drilling and I can drill them slowly, clearing chips as i go.

    This jig will drill identically on each block.

    upload_2022-9-26_11-29-52.jpeg

    I find it necessary to hold the drill bit at the critical alignment point for proper consistency.
     

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  2. Loud2ns

    Loud2ns Workshop Leader

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    Wow, that's quite the setup! Whatever works is the name of the game. Good luck!
     
  3. flockshot

    flockshot Rail Runner

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    It works great. It took the part of building that was the hardest for me to accomplish and made it a simple 5-minute process that is accurate and repeatable.
     
  4. DerbyDad4Hire

    DerbyDad4Hire Administrator Staff Member 25+ Pro Race Wins! National Champion

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    There is a simpler method. Find the bushing that appears to be off and using a hammer and tap hit the side of the drill bushing to straighten it up. A few taps and it is easily corrected. Not sure how but the bushings can be seated slightly off. Use a piece of scrap wood to do drills until it is seated correctly.
     
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