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Don52
Don52
Senior Member
Last Activity: Yesterday, 09:36 PM
Joined: 05-03-2008
Location: Troy, MI
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  • Don52
    replied to Antenna Base
    Thanks, Ray picked up the antenna this afternoon.
    Today I also finished machining a manifold for Ray’s consulting job, which is for a automotive paint equipment supplier.

    -Don...
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  • Don52
    replied to Antenna Base
    My chuck is a run-true chuck, which has an adapter that has the D1-6 pins on one side and a boss on the other. The chuck has four set screws that push on the boss. The set screws are used to center the chuck relative to the adapter. Attached are some pictures.

    1. Chuck adapter mounted...
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  • Don52
    replied to Antenna Base
    And here is the antenna mast base all done. The counter weight, which is not shown, would slide on the mass and rest on the base to add additional weight to the base.

    26. Antenna Base All Done


    -Don...
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  • Don52
    replied to Antenna Base
    I welded the cap to the top and the collar piece to the other side.

    21. Cap welded to mast


    22. Other end welded to mast and dressed


    Next, I assembled the antenna mast components.

    23. Mass inserted into base


    The collar...
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  • Don52
    replied to Antenna Base
    16. Legs Done


    I drilled the scrap piece left over from the base. I figured the antenna mast could use some additional mass to keep it from tipping over in the wind.

    17. Drilling the scrap as a counterweight


    The next step was the mast. I added a cap...
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  • Don52
    replied to Antenna Base
    11. Chamfering Bores


    And here is the base all done with lathe and mill operations:

    12. Base All Done


    The next step was to drill and countersink the legs followed by chamfering the end of the leg. My 45° chamfering end mill has enough flutes that...
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  • Don52
    replied to Antenna Base
    The next step was to cut the slots. I used a 1” roughing end mill. The depth of cut per pass was .050” and the speed was 800 rpm. The roughing cutter is a six flute endmill. The finishing cutter is a four flute endmill.

    6. Roughing Cutter


    7. Finishing Cutter
    ...
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    Last edited by Don52; 05-03-2021, 05:24 PM.

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  • Don52
    started a topic Antenna Base

    Antenna Base

    My friend and customer Ray designed a base for a Ham radio antenna that will eventually be mounted on top of a school, which is the highest point in the area. I machined all of the components for the antenna base. The antenna will be used for a Ham radio repeater station. The school didn’t want him...
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