I used 3/4″ thick oak, a 1 1/4″ Forstner bit, and 2 5/16″ hole saw bit. A 1 1/4″ spade bit can be used, but I liked the look the Forstner gave better.
I locked the bed of the drill press to the correct height, chucked up the Forstner bit, and clamped down my material and sacrificial spoil board.
I drilled down about half the board thickness. I removed the bit and chucked up the hole saw bit. If you don’t move the drill bed or the material, the hole saw should line up with the center of the piece.
Drill through the board, take your time and avoid burning. I used a can of compressed air to remove saw dust while drilling. You will most likely need to work the wood out of the hole saw. I used a flat head screw driver.
I used 220 grit sandpaper to finish the wheels.
An easy trick to sand the wheels quickly is to attach a bolt and chuck it up in a hand drill. Turn on the drill and sand while the wheels are spinning.
You can paint, oil, or wax the wheels. You can add a 1/4″ axel by friction fit or use an adhesive to make it permanent.