A cylindrical cutting system, a bit holder assembly, and machine for milling or scarifying road surfaces are disclosed. A bit holder is attachable to a milling platform, and includes an inward facing surface for engaging a corresponding mating surface of the milling platform. The inward facing surface of the bit holder and the mating surface include aligning fastener and pin openings. A fastener and a pin are inserted within the respective openings to couple the bit holder to the milling platform. The mating surface may define a part of a recess formed in the milling platform. A wear element may be disposed at the leading side of the bit holder. Multiple platforms may be coupled together with axially extended platform fasteners.

The present invention relates to a milling drum for removing glued-down floor coverings, in particular wooden floor coverings, preferably parquet floor coverings, in particular multilayer parquet, with a predetermined milling width which determines the width of a floor surface section by running the milling drum over the floor surface section to be machined, having a plurality of cutting plates which are arranged tangentially on the milling drum and which are arranged in a distributed manner on the milling drum, such that, upon a complete revolution of the milling drum, the entire milling width is operable with at least one cutting plate and such that a common width of the cutting plates being in contact simultaneously with the floor surface section to be machined is always smaller than the milling width. The present invention further relates to a surface milling cutter for removing glued-down floor coverings by use of such a milling drum, and a method for removing glued-down floor coverings by use of such a surface milling cutter.

An adjustable pitch rotor for a milling machine includes an inner drum and an outer shell formed by first and second outer shell portions. Drum cutting assemblies with cutting bits extend outward from outer surfaces of the outer shell portions, with each of the cutting bits being longitudinally spaced from longitudinally adjacent cutting bits on their respective outer shell portions by a pitch distance. In a first pitch configuration, each cutting bit may be longitudinally aligned with a corresponding cutting bit on the other outer shell portion so that grooves milled in a work surface by the rotor are spaced by the pitch distance. In a second pitch configuration, each of the cutting bits may be longitudinally spaced from longitudinally adjacent cutting bits of the other outer shell portion by one-half the pitch distance to mill grooves in the work surface that are spaced by one-half the pitch distance.

A cylindrical cutting system, a bit holder assembly, and machine for milling or scarifying road surfaces are disclosed. A bit holder is attachable to a milling platform, and includes an inward facing surface for engaging a corresponding mating surface of the milling platform. The inward facing surface of the bit holder and the mating surface include aligning fastener and pin openings. A fastener and a pin are inserted within the respective openings to couple the bit holder to the milling platform. The mating surface may define a part of a recess formed in the milling platform. A wear element may be disposed at the leading side of the bit holder. Multiple platforms may be coupled together with axially extended platform fasteners.

A combination bit and bit holder assembly includes a bit holder having a forward body portion and a shank. The forward body portion includes an upper end and a lower end. An insert is mounted in the bore of the upper end of the body portion. The insert also includes a central bore that receivingly retains a receiving cup. The receiving cup includes a bottom portion and an annular flange that extends from the bottom portion and defines a hollow forward portion. A bit is mounted in the hollow forward portion of the receiving cup which is configured to have a ductility that provides impact absorption to the bit.

A rotating cutting assembly includes a wheel and a tooth base coupled to an outer periphery of the wheel. The tooth base includes a narrowed stem and an aperture spaced from the narrowed stem. The cutting assembly further includes a cutting tooth removably secured to the tooth base. The cutting tooth has a mounting surface configured to engage the tooth base, and first and second bosses extending from the mounting surface and spaced apart from one another by a distance at least as large as a width of the narrowed stem such that the first and second bosses straddle the stem when the mounting surface engages the tooth base. The cutting tooth further includes an aperture aligned with the aperture in the tooth base. A fastener is received in the aperture of the cutting tooth and the aperture of the base to removably secure the cutting tooth to the base.

A cutting bit assembly for a mining machine includes a holder having a first surface, a second surface, and a bore extending therebetween, and a bit having a first end and a second end. The bit further includes a tip, a shank, and a shoulder positioned between the tip and the shank. The shank is positioned in the bore of the holder and defines a shank axis. The shoulder engages the first surface of the holder. The shank includes a projection adjacent the second end. The cutting bit assembly also includes a retainer having a groove and a resilient member. The groove engages a portion of the projection. The resilient portion engages the second surface of the holder and biases the retainer along the shank axis and away from the holder.

A system for use in securing bits against rotation in a motor grader may include a bit, with the bit having a shank. The shank may include a locking portion. The system may include an adapter board including a hole configured to receive the shank of the bit. The system may also include an anti-rotation plate configured to engage the locking portion of the shank of the bit such that the anti-rotation plate constrains the bit against rotation with respect to the adapter board.

A cutter bit for a work tool on a machine includes a leading end, conical-shaped tip portion, a rearward, frustoconical-shaped tip portion extending axially rearwardly from the leading end, conical-shaped tip portion, an annular ledge extending radially outwardly from a trailing edge of the rearward, frustoconical-shaped tip portion, a frustoconical-shaped body portion extending axially rearwardly from an outer circumferential edge of the annular ledge, a cylindrical collar portion extending axially rearwardly from a trailing edge of the frustoconical-shaped body portion, and a trailing end, cylindrical-shaped shank portion extending axially rearwardly from the cylindrical collar portion. The cutter bit may also include a plurality of circumferentially-spaced ribs projecting radially outwardly from an outer peripheral surface of at least one of the leading end, conical-shaped tip portion, the rearward, frustoconical-shaped tip portion, or the frustoconical-shaped body portion.

A bit holder that includes a front portion and a shank axially depending from the front portion. The front portion having an axial length that is less than the axial length of the shank. A combination bit holder and base block that includes the bit holder with the front portion having an axial length that is less than the axial length of the shank. The base block including a mounting portion and a device receiving portion, the device receiving portion including a length that is the same or less than a length of the mounting portion. The base block having a device receiving portion that includes a length shorter than a length of the mounting portion adapted to provide increased access to the rear of the bit assembly allowing the base blocks to be mounted closer to each other for micro-milling operations. Shortened bit holder shanks are reconfigured from prior art to provide increased holding power between the bit holder shank and base block bore.