What is a polishing arbour?

What is a polishing Arbour? I came across this in a beginners manual but have never heard of the term before

It’s a cone (mostly) shape spindle which fits on the axle of your polishing machine to hold de polishing weel or buffing wheel.

Go to the website of any of the places that sell jewelry making equipment and search on the term. You will find that it applies to a wide range of items.

Not suggesting this site, but I took this screenshot that show the setup, and purpose of the spindles.

I will add that installing these tapered arbors is not trivial. Maybe it is my cheap HF polisher, but I find that it takes some finagling to mount these in such a way as to avoid eccentricity.

Thanks Pedro