As an update Onsrud has introduced its new tuff-core compression bit.
this is the quote from my dealer sheet.
Quote "First solid-carbide routing tool that utilizes a tuff inner core for strength and a wear resistant outer shell for long life in abrasive materials.
Feed rates up to 155% faster than a conventional 3/8" 3-flute compression without breakage.
Replace 1/2" compressions with 3/8" tools to increase yield" end quote

These cutters are a in 3/8" only and availble as 2 or 3 flute CEL 7/8" & 1 1/8"
The 1.125 is a standard compression while the other 2 are *mortise compression
#'s will be 60-123DC*, 60-124DC and 3 flute 60-126DC*

What is interesting about these new cutters with the center core is that they will combat the old problem of bit diflection. Have put a request to the factory if they will release in 1/4" as well. Will update on any progress