We have a PM7 which can mill CoCr, but we don't use it for that. I know that milling CoCr is harder on the spindle. I also believe that needs to be milled wet which takes time to switch between wet and dry milling to ensure the mill is cleaned properly. We use ours solely for milling zirconia, wax, and occasionally PMMA. We outsource all our Ti custom abutment milling and if i needed a CoCr framework, I would outsource that as well.
PMMA gets hot and kills tools. It really should be wet milled but most dry mill it on machines that are dry only and is really much harder than zirconia, although nothing close to CoCr
PMMA gets hot and kills tools. It really should be wet milled but most dry mill it on machines that are dry only and is really much harder than zirconia, although nothing close to CoCr
Milling Titanium and CRCO kills spnidles as diving into metal and ripping it laterally is the high force on a spindle. Milling Ti forms of pre mills is not as heavy on the spindle but glass ceramic is also hard on the spindle. Hence in the new Axis 5x500L they have a variable dual ceramic bearing from 2.1 to 3.2KW spindle that adjust killowatt power as needed per the job it is cutting.
PMMA is hard but when using the right tools and strat it is easy. I know people cutting pmma for years no issues on the spindle.