I want to put twist drill of dia 21.5 and 23.5 on my machine. My daily requirements would be more than 1000 holes per day. Have majorly used has drilling on radial drills and annular cutter on magnetic drills.
Annular cutters are not suitable in cases where stacking is preferred. HSS twist drills are not so fast.
I am currently developing a CNC drill machine, and I need to find the right speed(s) options that I need to design for.

Details
Drill dia 21.5mm or 23.5mm
Material Steel low carbon, BHN around 150, normalised.
Drill Type HSS twist drill.

What if I upgraded to a carbide tip twist drill, something like Sandvik Coro 870. What speed would these like at the same diameter?

Thanks