"PrecisionmachinisT" wrote in message news:qZqdnVfc04NhicXSnZ2dnUVZ_umdnZ2d@scnresearch. com...



"I use to mill that stuff in the annealed condition pretty without coolant pretty much all day long on a bridgeport hand mill at a speed where chips just barely begin to turn a light amber color"

To clarify, the above was done using M48 HSS endmills...