The Best Value is Seldom the Lowest Price
Obviously, every application is different and knife sharpening requirements change based on throughput and usage. But, no matter what the application or usage rates, replacement knives are the most significant operating costs associated with granulators.
A typical granulator running near capacity processing Post Consumer or other abrasive materials, will require two knife changes or sharpenings per week, minimum.
Most competitors’ granulator knives have about 8 mm - 9.5 mm of regrind of which about 1 mm is removed per sharpening. That means one set of knives will last nine sharpenings or less than five weeks in this application.
The Herbold Rotor and Knife design provides 18mm of regrind capacity, nearly twice that of competitive models. This equates to 18 sharpenings and an average life expectancy of nine weeks. Factor in the knife savings (outside knife adjustment and consistent blade to screen clearance) the yearly savings is impressive, providing unmatched value.