As per my experience, for three years in the middle east and more than 70 machines, I didn't experience any excavator breakdown because of the cutter,
You are right about the power some how, as cutter requires relatively higher oil flow than other attachment, but if the excavator is big enough to supply the required oil flow at reasonable RPM (around 1600 rpm) then it would run with no problems and long life, and that's how cutters were designed to suite different sizes of excavators.
As per my experience, for three years in the middle east and more than 70 machines, I didn't experience any excavator breakdown because of the cutter,
You are right about the power some how, as cutter requires relatively higher oil flow than other attachment, but if the excavator is big enough to supply the required oil flow at reasonable RPM (around 1600 rpm) then it would run with no problems and long life, and that's how cutters were designed to suite different sizes of excavators.