A cutting insert includes an upper surface having a circular cutting edge, a lower surface opposite the upper surface, an exterior sidewall between the upper surface and the lower surface, and an interior sidewall defining a hole extending from the upper surface to the lower surface. The interior sidewall includes an upper interior sidewall portion and a lower interior sidewall portion. The lower interior sidewall portion increases in radius with respect to a downward direction of the cutting insert. The lower interior sidewall portion includes a plurality of recessed portions positioned about a circumferential direction of the lower interior sidewall portion.

A land preparation tool includes a tool body having a longitudinal axis, a cutting surface having a distal end and a blade positioned at the distal end, and a mounting interface disposed on the tool body opposite the cutting surface. The mounting interface has an apex extending along the mounting interface parallel to the longitudinal axis, a mounting surface extending from the apex, another mounting surface extending from the apex, and an opening. A channel extends from the opening of the mounting interface into the tool body.

A milling cutter includes a milling drum having a body with a first end, a second end, an outer surface extending around a circumference of the body between the first and second ends, and a plurality of slots formed in the outer surface. The plurality of slots arranged in a staggered row between the first end and the second end of the body. The milling cutter also includes a plurality of cutting insert removably secured to the body. Each cutting insert is positioned at least partially within one of the plurality of slots and includes a cutting profile defined by rounded peaks and pointed valleys to cut a tooth form into a saw blade. The plurality of cutting inserts are staggered such that the plurality of cutting inserts are circumferentially offset from each other along a longitudinal axis of the milling drum.

A polygonal cutting blade having a circular arc-shaped groove in a hole includes a blade body composed of an upper surface, a lower surface and a plurality of main side surfaces connecting the upper surface and the lower surface. The blade body has a central hole penetrating through the upper surface and the lower surface, and is centrally symmetrical about a central axis of the central hole. At least one set of positioning side surface comprised of adjacent two of the main side surfaces is provided. An inner surface of the central hole has at least one circular arc-shaped groove fitting with a fastening screw for fixing the cutting blade. The circular arc-shaped groove directly faces toward an intersection of the two main side surfaces of the set of positioning side surface. A groove central axis of the circular arc-shaped groove has an offset distance from the central axis.

A cutting body rotatable about a tool axis has an insert receiving pocket with a seat surface at an axial forward end thereof. The seat surface has a plurality of abutment elements, including an axial abutment element having an axially forward facing abutment surface and at least one radial abutment element. In a top view of the insert receiving pocket, the axially forward facing abutment surface forms an external acute clamping angle with a radially outward facing pocket wall. A rotary cutting tool includes the cutting body, and a cutting insert removably secured in the insert receiving pocket, having a base surface in contact with the seat surface. The at least one radial abutment element occupies or is occupied by at least one radial abutting element of the base surface, and the axially forward facing abutment surface is in contact with an axial abutting surface of the base surface.

An indexable rotary cutting tool and insert is capable of performing a high-accuracy cutting process with high efficiency. A twist angle of an outer peripheral cutting edge of the tool has a positive value, an axial rake angle of the cutting edge of a corner R of the tool at a boundary point between the cutting edge of the corner R and the outer peripheral cutting edge has a positive value, the axial rake angle of the cutting edge of the corner R at a reference point has a negative value, and the radial rake angle at least between the boundary point and the reference point in an entire edge length region of the cutting edge of the corner R has a negative value. The radial rake angle at the reference point is smaller than the radial rake angle at the boundary point.

An indexable cutting insert has opposing upper and lower end surfaces, and a peripheral surface including three side surfaces circumferentially alternating with three corner surfaces. The three side surfaces define an imaginary triangle and an imaginary hexagon. Each corner surface intersects the upper end surface to form an upper corner peripheral edge having a primary cutting edge. In a top view, each triangle side traverses two upper corner peripheral edges, imaginary lines tangential to the end points of each primary cutting edge are either collinear or form an obtuse angle greater than 175 degrees, each primary cutting edge has a primary length greater than half the hexagon side length, and at least one triangle side traverses each primary cutting edge. The insert is removably secured in a rotary cutting tool such that one of the upper corner peripheral edges contains an axially forwardmost point of the insert's upper peripheral edge.

A land preparation tool includes a tool body having a cutting surface, mounting surfaces disposed on the tool body opposite the cutting surface, and opposing side surfaces each extending between the cutting surface and a different one of the mounting surfaces. One mounting surface angles inwardly from a distal edge of a side surface toward the tool body. Another mounting surface angles inwardly from a distal edge of the other side surface toward the tool body. An opening is disposed on the tool body opposite the cutting surface and between the mounting surfaces. Other embodiments are described and claimed.

A land preparation machine includes a land preparation apparatus connected to a lift assembly of a vehicle. The land preparation apparatus has a rotatable drum and a plurality of tools assemblies disposed thereon. A tool assembly of the plurality of tool assemblies includes a tool holder and a tool attached thereto. The tool includes a tool body having a cutting surface disposed on a side of the tool body, an apex disposed on a different side of the tool body opposite the cutting surface, and tool mounting surfaces disposed on the side of the tool body opposite the cutting surface. One tool mounting surface extends outwardly from the apex at an angle toward the cutting surface. Another tool mounting surface extends outwardly from the apex, opposite the other tool mounting surface, at an angle toward the cutting surface. Other embodiments are described and claimed.

The present invention provides a cutting insert in which suitable honing is formed on a cutting edge. The cutting insert is provided with: two end surfaces opposing each other; a peripheral side surface extending between the two end surfaces; and a cutting edge formed on an intersecting ridge between at least one of the two end surfaces and the peripheral side surface. The cutting edge at least includes a major cutting edge and an inner cutting edge. Honing is provided on the major cutting edge and the inner cutting edge. A width of second honing of the inner cutting edge is narrower than a width of first honing of the major cutting edge, as viewed from a side of the end surfaces.