A rotatable or non-rotatable bit for road milling, mining, and trenching equipment that includes a substantially solid body and a substantially solid, generally cylindrical shank depending from a bottom of the body. The bit also includes a forward portion integrally formed at a forward end of the body. The forward portion includes a bore adapted to receive a bit tip insert. Additionally, the bit can also include an insert or transition member disposed within the bore of the forward portion, the insert including a bore adapted to receive the bit tip insert.

The invention relates to a tool combination consisting of a chisel holder, which can be fastened to a milling drum of a soil tillage machine, and at least one leading and one trailing chisel, which are retained on the chisel holder, wherein the trailing chisel is arranged after the leading chisel, based on a working movement of the tool combination in use in the soil tillage machine, and wherein each chisel has a chisel tip having a cutter. According to the invention the trailing chisel tip of the trailing chisel has, at least in some areas, a greater hardness than the leading chisel tip of the leading chisel. Thus stoppage times of the soil tillage machine for maintenance can be reduced and the loss of chisels can at least be decreased.

A round-shank pick, comprising a pick head and a pick shank, the pick head including a base part and a cutting element, which is connected to the base part and is composed of a hard material, in particular hard metal, wherein the base part has a wear-resistant layer on the outer surface thereof at the connection to the cutting element, which wear-resistant layer covers at least one segment of the outer surface of the base part facing the cutting element and wherein an end face of the wear-resistant layer facing the cutting element is covered by the cutting element. The base part has an axially oriented cut-out for receiving a fastening segment of the cutting element, the base part has a counter surface facing the cutting element and extending around the cut-out, and the counter surface and the end face of the wear-resistant layer form a continuous flat surface.

Embodiments of the invention are directed to cutting tool assemblies, material-removing machines that include cutting tool assemblies, and methods of use and operation thereof. In some embodiments, the cutting tool assemblies described herein may be used in material-removing machines that may remove target material. For example, the cutting tool assemblies may include one or more superhard working surfaces and/or one or more shields.

Embodiments described herein relate to material-removal systems and cutting tools that may be used in the material-removal systems. More specifically, for example, the material-removal systems, and particularly the cutting tools thereof, may engage and fail target material. In some instances, the material-removal systems may be used in mining operations.

This disclosure relates to a system for removing road material. In an embodiment, the system may include a milling drum and at least one pick mounted on the milling drum. Furthermore, the pick may include polycrystalline diamond at least partially forming one or more working surfaces of the pick.

Embodiments disclosed herein are directed to a system for removing road material. In an embodiment, the system may include a milling drum and at least one pick mounted on the milling drum. The pick may include polycrystalline diamond at least partially forming one or more working surfaces of the pick.

A bit tip insert on a bit/holder, tool, and/or pick for road milling operations that includes a body including a tip and a base subjacent the tip The bit tip insert also includes at least one heat transfer bore extending from a distal end and/or bottom of the body to a bore termination disposed within the base and/or the tip of the bit tip insert. The at least one bore of the bit tip insert is adapted to allow inward contraction when the overlay transfers heat into the base during operation.

An improved diamond coated bit tip insert for a unitary bit/holder, tool, and/or pick for road milling operations that includes a body including a tip and a base subjacent to the tip. The tip of the bit tip insert includes a substrate and an overlay on an outer surface of the substrate. The base of the bit tip insert includes a tapered sidewall or a cylindrical sidewall, the tapered sidewall providing a greater concentration of force applied at an interface of the overlay and the substrate of the tip during a high pressure high temperature (HPHT) process than when using the cylindrical sidewall and the high pressure, high temperature process.