The other day, regarding drill coating, I received a very helpful comment (which I won't post here).
Thank you so much.
What I wrote was based on my experience with hand drills,
but it seems the necessary conditions change when dealing with larger machines and such.

Below is a private reply

↑By the way, this is a rolling flat die attached to the spoke cutter I use.
It still seems usable, but I replaced it quite a while ago.
The early model (the one in the photo) has partial honing,
while the current model has full honing across the entire surface.

I'm always grateful for your support.


Additional note: Reply to further comments on my private message
Thank you for providing the information necessary for stable supply.

Actually, I was so confident that it would be a lifetime tool
that I've already secured the blueprints and supplier.
I'll definitely be relying on you going forward, so thank you in advance.
The low resolution of the blueprint image is, of course, intentional.