Dryer Rollers: what could I make with them?

I fix appliances and replace the rollers on clothes dryers quite often. Usually there are 4 to 6 rollers and when I change them all out half of them are still good (but since I have the dryer taken apart, the customer usually wants them all replaced considering the labor cost)
Anyhow, the rollers are about 3” in diameter with a 1/2” bore hole. They are held in place by a post a few inches long. Whatever cart I make would have to have post axles instead of one axle through the whole thing. If I could figure out how to turn them into casters I would but I think they will have to be attached to the side of whatever I make.  I like to put casters under everything so it’s never hard to move things around. Im trying to come up with ideas that would make something useful or better not necessarily a toy or something like roller blades. I.E. a heavy duty drawer roller, air compressor wheels, etc.
ps I work with 8 other techs so Ive been saving a few rollers & have unlimited supply.

Any ideas?

My first thoughts are for applications with similar mechanical behavior to the original dryer drum:

- supports for a rock tumbler drum

- supports for a porch column "lathe" (or for spars for small sail boats)

I imagine you've seen a rock tumbler before, so need for explanation is not likely warranted.  The porch columns (or booms/masts) I'm thinking of are built up from boards or staves, with one edge having a "bird's mouth" groove down the length to receive the squared edge of the next board.  Depending on the size of the column and the thickness of the boards, the initial glue-up might have upwards of 8 sides (with the bird's mouths oriented accordingly).  If making booms or masts, the boards can be tapered to yield a varying diameter "stick".  After edge gluing the hollow column, it can be turned round on the outside diameter.  A "cat head" at each end will be needed as a running surface for the dryer drum wheels, at least until some cylindrical "register" can be established on the OD of the column.

Here's an article on the Duck Works website on building up spars in this fashion, but without benefit of such a lathe as I have described:
https://www.duckworksmagazine.com/06/howto/birdsmouth/index.htm

The porch column lathe would be most helpful if making fluted or round antebellum, Greek or Roman columns.  And, totally superfluous for square section Craftsman style columns.  I know I saw an article some years ago (Maybe in Fine Homebuilding?  Pretty likely to have been some Taunton publication) on turning replica porch columns in this fashion, but I can't seem to lay hands on it (literally or metaphorically) at this moment.  If I find it. I'll add a reference on edit.

Neither of the above will use very many dryer rollers, though.

I can't imagine that these are rated for either high speed or high radial load (or for any combination of load multiplied by speed that would be a "high" value), so that probably limits their use a bogies for a homebrew version of Mattracks for your deuce-and-a-half (or garden tractor), for example.

Rollers for positioning your backyard celestial observatory's dome?

Still cogitating...

Re-purposing side of brain activated . . . and it said  "drop spindles" or "supported spindles"   but then I've been a yarn spinner for quite some time.   [depending of course on what they weigh]

If you wanted to make some sort of roll up door for a workshop or something, they might do that sort of a job.

I'm pretty sure I've seen people use them on oversize heavy duty drawers for workshops.

I wonder how much weight each one can consistently bear without damage. Maybe 25 lbs?

Can two of them be joined together with a single nut? That's 50 lbs, and the nut could be welded to a steel frame. 20 pairs would support 1000 lbs.

This could be a handy "crawler," a version of a stoneboat for dragging bulky and awkward loads around the homestead. 1.5" to shaft is not a lot of clearance, but maybe it's just enough.

When I first saw the picture, I thought that looks like an exercise tool though when I read it is 3 inches, I guess that is out.

What about rigging them to somehow roll furniture, maybe by bolting them to the bottom of furniture.

It would be tedious, but I'm sure you could make a sort of conveyer table system to move heavy things. I just don't know where that might fit in at a homestead.

In industry, we will have tables made up of rollers for ergonomic ease sliding heavy things. In my experience it is bringing heavy bales of stuff to be dropped into a large stainless steel vat/blender.