Morris Dovey wrote:

In my experience, Forstners tend to heat up pretty quickly. I've been
excruciatingly careful with mine to avoid burning - and have been
wishing that I'd bought a carbide-tipped set. (The HSS set I have came
from Woodcraft Supply.)

I thought the whole point of HSS that it's air-quenched, and thus can't
be "burnt" because it hardens again as soon as it cools?

Chris