I know many other people have done this with square blocks of wood.
However, I have never seen it done in the round using a lathe.
Therefore, I thought I would take a shot at it.
After several R&D tests and
the typical learning curve, there was success.
Each is made from one piece of Hard Maple turned on the lathe.
A small router mounted on the lathe with a 1/4" cutter
is used to make the openings.
The balls were inserted using woodturner's magic
followed by the finishing process.