A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A tool holder is disclosed for use with a milling drum. The tool holder may have a cylindrical body defining a first end and a second end, the first end configured to be received within a tool mounting block of the milling drum, the second end configured to receive a cutting bit. A flange may be located between the first and second end with respect to an axial direction, and a first bore, with a first opening defined by the second end and extending towards the first end. A frustoconical portion may be located between the flange and the first end with respect to the axial direction and a cylindrical portion located between the flange and the first end. At least one radial opening may pass through at least the wall of the cylindrical portion to intersect or be open to the first bore.

A cutting tool system is provided that includes a locking collar and a bit attachment member. The locking collar is compressible radially inwardly and has a tapering outer surface. The bit attachment member has a tapering inner surface constructed to receive and interface with the outer surface of the locking collar. According to an embodiment, a first groove in the outer surface of the locking collar is alignable with a second groove of the bit attachment member to form a perimeter of a pin receptacle in which is pin is insertable to prevent relative rotation between the locking collar and the bit attachment member. According to another embodiment, the cutting tool system further includes a retainer plate and fasteners constructed to secure the retainer plate directly to the locking collar and to the driving shaft, and to cause inward compression of the locking collar.

An apparatus to install structural supports in a mine tunnel is conveniently mountable on a mining machine having a cutting head mounted at one end of a boom. An extendable and slewing manipulator arm of the apparatus is mounted on a support platform that is slidable in the axial forward and rearward direction and includes a grasping device to hold the structural supports in a plurality of different positions.

A spray system for dust control on a shearer machine that operates laterally with respect to a mining floor surface is provided where the spray system is provided with a set of first ranging arm sprays mounted on a first ranging arm and wherein said first ranging arm is located on a first end of a shearer machine chassis. A set of second ranging arm sprays is optionally provided and is mounted on the upper side of the first ranging arm and resides approximate to and in operational relationship to the set of first ranging arm sprays. Furthermore, a plurality of chassis spray sets may also be optionally provided and are located on a mining side of said shearer machine chassis and reside in a non-linear format. Moreover, a set of shearer-clearer venturi arm sprays may also optionally be provided and is mounted on a shearer-clearer venturi arm that resides as an angular extension of the set of first shearer-clearer arm sprays.

The invention relates to a milling machine having a replaceable milling drum, different types of milling drums being capable of being associated with the milling machine; and having a control unit for controlling the milling machine, machine parameters of the milling machine being settable by way of the control unit. Provision is made that the milling machine has associated with it at least one means that is designed to detect at least one characteristic feature of the milling drum; that the at least one means is connected to the control unit; and that the control unit is designed to specify for at least one machine parameter, indirectly or directly from the characteristic feature, a value to be set, and/or a setting range. The invention further relates to a corresponding milling drum and to a corresponding method. The milling machine, milling drum, and method allow the selection of machine parameters for operation of the milling machine to be simplified.