Abstract: A gearless, clutchless agricultural rotary vegetation cutter includes a drive train having a tire which is attached to a power shaft which receives power from the PTO of a tractor. As the power shaft spins, it causes the tire to spin against a rotor plate. As the rotor spins in response to the spinning of the tire, the rotor plate causes a blade carrier to which cutting blades are attached to spin. The cutting blades then mow and shred the vegetation encountered. When an obstacle is encountered by the cutting blades which causes the blades to stop turning, the tire continues to turn on the rotor plate without resulting damage to the drive train or to the tractor.