Originally Posted by
PixMan
Shrink fit tooling is a great choice for high-speed applications, but making your own toolholders for it will be costly and perhaps risky.
Material of choice should be one that can take many cycles of dull-red hot to cold without losing temper. Perhaps and 8620 or 4350 would be good choice. Concentricity tolerance of the shank mount surface to the tool mounting bore is super-critical for balance issues, and the tool should be ground to spec on a good I.D/O.D. grinder.
What configuration is the the current tool holders? Straight shank or tapers?