Diamond bits from a local dentist...repurpose?

[LittleWatchShop]

I got a hundred or so bits from my dentist.  These are used for making crowns.  I asked him to save them for me, so now I need to come up with a way to use them.

The obvious use is for grinding in some way.  I will ponder.

Perhaps @HectorLooihas some ideas.

[HectorLooi]

Diamond burs are good for cutting brittle materials like tooth substance, obviously, glass, ceramics, stone, stuff like that.

But it isn't that good for cutting metals, plastics, wood, etc.

The optimal cutting rpm for small diameter tools like these is about 125000 rpm. Our air driven drills run between 220000 and 400000 rpm.

Our newer electric driven moters run at 40000rpm. When coupled to a 5X speed increasing handpiece, it runs at 200000 rpm.

When I retire in 10 day's time, I'm bringing home one of my air compressors and getting a standalone portable dental drill unit from AliExpress to run my drills.

One of the stranger things that I use diamond burs for are emitters for negative ion air cleaners. The steel emitters in negative ion generators normally wear off after awhile. But diamonds don't wear out. And a diamond bur has hundreds of little sharp points to act as multi-point emitters.