How many holes? Would a punch and die work instead of a drill?

You could also drill using the method that has previously worked for you and then make a bush to reduce the hole diameter.

A carbide end mill would go through it but needs ridgidity. I would also be tempted to try a cheap carbide PCB (printed circuit board) drill (£0.59 each if bought in a multiple of ten from Amazon).

I have a set of cobalt drills for this type of job.

Way too much overthinking going on here as usual. There is a big clue in the question “high carbon steel with induction hardened teeth”

I would not use anything special to drill a bit of gauge plate or silver steel so why anything fancy or even spark eroders for this bit of carbon steel.

Get out the armchairs and give it a go.

Bog standard HSS 1/16″ drill that is past it’s best and in the rough work rack and a bit blunt, equally rough Naerok drill press, a bit of Sulphur containing CT90, no punch mark to start it and no skidding about. What could be easier. Hardest thing was holding the springy blade down, holding the camera and pulling the quill down with just two hands. Not even a bit of smoke to make it look like it was hard to drill

I did use one on the quill, other held phone and blade.

Oh and if anyone was wondering the same HSS drill also goes through Eclipse hacksaw blades.

Waste of a good file😉 I never did buy anthing on those type of guys.

It was nearest to the drill press and also illustrates that nothing special was needed. If i’d have picked up a good one then it would have been coated and split point but the example was just plain black steam tempered and normal point.

The first hole drilled on the video which is second from the right was quite close to the heat zone so I’d just try a normal drill unless you have a suitable cobalt one to hand rather than buy something that may not be needed.

Quite possibly because their power hack saw blades tend to be HSS not carbon steel with hardened teeth that the OP wants to drill.