The cutterhead is equipped with 48 individual knives on the 3975 Pull-Type Forage Harvester (PTFH) and 36 individual knives on the 3955 PTFH.
The segmented-knife design allows material to move away from the cutterhead more efficiently. The produces a high-quality cut (even through heavy mats) while using less horsepower.
The slotted mounting holes allow the knife to retract if rocks or other obstructions are encountered.
To replace the damaged knife, simply loosen the mounting bolts.:
No need to replace additional knives to balance the drum