A disk for vertically cutting grass surfaces, the disk includes a center plate mountable to a shaft and a plurality of teeth extending from a circumferential edge of the center plate. Each tooth comprises a base extending from the circumferential edge of the center plate and at least one blade extending from the base at an offset angle. Each blade includes a neck extending from the base at the offset angle, and a tip extending radially outward from the neck relative to a center plane of the center plate such that the tip is offset from the center plane. The tip also extends from the neck at a yaw angle relative to the center plane such that when the disk is rotated about a rotational axis of the shaft a leading edge of the tip rotates in a different rotational plane than a trailing edge of the tip.

A rock guard for use on a rotary disc cutterbar having quick-release knife connectors wherein a knife removal relief channel is oriented 45 degrees from a straight-ahead orientation to allow more than one quarter of the knives on the cutterbar to be simultaneously aligned with the channels for removal. A second knife removal channel is also oriented 45 degrees from the straight ahead orientation and 90 degrees from the first channel to permit half of the knives on the cutterbar to be simultaneously aligned with the channels for removal. The incorporation of two knife removal channels as described benefits rotary cutterbars having two knives per rotary cutter and adjacent cutters rotationally offset by 90 degrees regardless of whether co-rotating or counter-rotating rotary cutters are employed.

A disc mulcher can be connectable to a carrier vehicle and can include a frame connectable to the skid steer, a spindle, a disc, and a variable speed motor. The spindle assembly can be connected to the frame. The disc can be connected to spindle assembly and can be rotatable relative to the frame about a central axis of the disc and the spindle assembly. The variable speed motor can be connected to the frame and can be indirectly coupled to the spindle assembly. The variable speed motor can be operable to rotate the disc.

A disc mulcher can be connectable to a carrier vehicle and can include a frame connectable to the skid steer, a spindle, a disc, and a variable speed motor. The spindle assembly can be connected to the frame. The disc can be connected to spindle assembly and can be rotatable relative to the frame about a central axis of the disc and the spindle assembly. The variable speed motor can be connected to the frame and can be indirectly coupled to the spindle assembly. The variable speed motor can be operable to rotate the disc.

A chopper system and method for cutting crop material with a rotating first drum having first blades and a counter-rotating second drums having second blades. Blade pairs with one first blade and one second blade contact one another and cut the crop material. The blades of each blade pair contact one another for at least ten degrees of rotation. The blades can have beveled cutting edges, and the blade pairs can make bevel to bevel contact. The initial contact of the blade pairs during each rotation can form a swipe angle of 15 degrees or less. The initial contact of the blade pairs during each rotation can have the acute end of the first blade contact the second blade near the middle of the beveled edge. During each rotation, the acute end of the second blade can contact the back of the first blade.

An apparatus including a cylindrical rotating body having a surface section that functions as a driving wheel or a working member. The apparatus includes a main body, a cylindrical rotating body disposed below the main body, and a control unit configured to control driving of the cylindrical rotating body, where the cylindrical rotating body includes a motor, and an exterior body configured to be rotated by the motor, and the exterior body or a member provided on a surface of the exterior body functions as a driving wheel or a working member.

A cutting disc for a machine for harvesting stem-like plants includes a number of elements which together can be attached or are attached to a bracket forming a circular ring with an outer cutting edge. At least one of the elements is attachable to the bracket in a first position, in which a first edge of the element forms the outer cutting edge, and in a second position, in which a second edge of the element forms the outer cutting edge. No matter whether the element is in the first of second position, a circular cutting edge is made up.

A cutting disc for a machine for harvesting stem-like plants includes a number of elements which together can be attached or are attached to a bracket forming a circular ring with an outer cutting edge. At least one of the elements is attachable to the bracket in a first position, in which a first edge of the element forms the outer cutting edge, and in a second position, in which a second edge of the element forms the outer cutting edge. No matter whether the element is in the first of second position, a circular cutting edge is made up.

A rotary cutter for cutting grass, brush, shrubs, bushes, trees, and other vegetation, and a method of using the same. The cutter includes a bi-fold door proximate to an open front portion of the cutter's deck, which defines an open cutting area. The bi-fold door moves between a closed position where it shields the cutting area and an open position where it exposes the cutting area. The bi-fold door includes a front cover rotatably coupled to a rear cover via the first hinge, with the rear cover being rotatably coupled to the deck via the second hinge. The cutter also includes a first ramp and second ramp flanking the open front portion of the deck. Protrusions of the bi-fold door slide along inclined surfaces of the ramps as the bi-fold door moves between the closed position and the open position.

A land roller implement for chopping vegetation on the ground has one or more rollers including a drum body with mounting flanges protruding radially from the drum body onto which chopping blades can be fastened. The mounting flanges are fixed to the drum body with front weld beads that are spaced apart along the leading face of the mounting flanges. The blades are notched along the inner end to define recessed portions aligned with and receiving the front weld beads therein such that protruding portions at the inner end of the blades between the recessed portions are able to abut against the peripheral surface of the drum body without interference by the front weld beads. The bolts fastening the blades to the mounting flanges are thus isolated from shear forces by the abutting protruding portions while the mounting flanges remain secured against folding backward due to the presence of the front weld beads within the recessed portions.