Ive really struggled to get a 1/2 HSS end mil to do much more than a 1/4" HSS end mill without chattering. Shear hog on the other hand can run that 3+ CIM all day long with the deep cuts.
Ive really struggled to get a 1/2 HSS end mil to do much more than a 1/4" HSS end mill without chattering. Shear hog on the other hand can run that 3+ CIM all day long with the deep cuts.
That suggests something wrong with either your machine or your setup. The machine is definitely capable of working quite well with 1/2" tools. and getting upwards of 3 cu. in./min MRR. What kind of holders are you using? Do you hand-tighten the drawbar, or use the PDB? What length tools are you using? 2-, 3-, or 4-flute?
Regards,
Ray L.