Will tool steel work for a disk?

[Eventorizon]

Thanks that's good to know, I'll machine a 4 - 5mm rad onto the teeth.

I would only add a 2mm. 5mm is actually quite large; similar to the rounded edge of a felt tip pen as it means its 1cm in diameter. It will self round after a while which is why you make the teeth as big as possible. I plan for the drum in C3 to a single 20mm bar sticking out. I will leave the edges square so they just round during combat.