Here is another example of tool made with the M33 nut.
This time, no need for metal lathe.
It is a spindle that supports the polishing wheel I use for Canauba waxing my finished pieces.
Previously, it was mounted on my chuck, but after a lot of use, the chuck deep marks in the wood made it quite off-center. Now it is preferable to get it independent from the chuck.
I think the pictures are self explanatory :