Big shaft on a very heavy duty ball bearing.
The shaft is tapered (there's cuts on four sides, allowing the top to be smaller than the base.
If a close fitting shaft was to be slid through the center, the tapered outer would tend to have some interference/clamping force on the inner shaft...
Hollow tube
May be able to be adapted to be a base for something that can rotate (like a small table or stool, or?)
Some rust on the bearing
Hard to make out.
I think it says FLTI
The shaft goes through the bearing and is fixed in place somehow.
The four notches are obviously for something to mate to.
A bit hard to make out so used a wire brush to clean it a bit first.
Better...
The last part is "-410"
Middle part is "A0C63"
First part is HCP (logo)
Four holes on the bearing.
One looks to be clogged with heavy grease.
