Dome sander

  • Dome sander

    Posted by Michael Minton on October 8, 2025 at 4:46 pm

    Here are some pictures that show the basic elements of a dome sander I made.

    Critical part is a lawn mower blade bearing/spindle. Cost $63. It is marked part # 607418 Blade spindle assembly. It has a tap for a .625-11 bolt on the side I put facing upward to bolt on the disk, and a shaft with a keyway on the bottom to attach to the big pulley.

    I used a 11” diameter and 2.5” diameter pulley combination. This gives just about the perfect speed. The motor is a Dayton 3k771BG. It is 1725 rpm, 1 hp. Blade tension is from a basic spring pull arrangement. I built it in a box with sides and a vacuum inlet. It makes lots of dust. I use an 80 grit paper.


    If anyone wants STL files of a 28R and 15R dome, pm me.

    Michael Minton replied 5 months, 1 week ago 3 Members · 3 Replies
  • 3 Replies
  • Ian Davlin The Looth Group

    Administrator
    October 9, 2025 at 6:27 am

    Dude ! This is great !

  • Michael Minton

    Member
    October 9, 2025 at 1:15 pm

    It is so easy to use, and I’m getting great results.

    One thing to add. Don’t buy a reversing switch for it. If you run it backwards, all it does is spin off the bolt. Don’t ask me how I know that.

  • Michael Minton

    Member
    October 10, 2025 at 11:03 am

    Another thing I forgot to add. The motor is mounted to a board connected to the chassis with a big ass hinge, so you can tension the belt with the spring

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