A tool holder includes a body, a head, and a flange. The body is dimensioned to fit closely within a slot formed within a flight block. The head is positioned at a distal end of the body and has a recess to receive a cutting tool and hold the cutting tool in a rotationally forward orientation. The head includes a threaded bore extending from the recess to an outer surface, and a set screw positioned within the threaded bore, to selectively engage and secure a cutting tool therein. The flange is ...

A mining auger includes an auger shaft having a front end, a conical end ring affixed to the front end of the auger and having a forwardly oriented face and a peripheral edge zone; a plurality of tool holders affixed to the peripheral edge zone in a circumferential distribution and each having a forwardly oriented face; and a cutting tool bit carried in each tool holder. Each cutting tool bit projects forwardly beyond a peripheral edge of the conical end ring and has a longitudinal axis extendin...

A mining unit for a coal combine comprising a cylinder having a cap plate d helically wound panels on the cylinder. The edges of the plate and the panels are provided with cutter holders. The perimeter of the panels project beyond the edge of the cylinder in the direction of the combine body forming a conical profile. The cylinder overlaps the body of the combine. An element mounting the unit on a drive shaft of the combine is situated inside the cylinder so as to be partly within the region of ...

In accordance with the invention as embodied and broadly described herein, the present invention features a milling mandrel attachable to a milling device and comprising a primary cylindrical barrel; a plurality of cutting bits removably attached to the primary barrel and arranged about a support base within a cutting/sawing area or segment or sector defined on the primary barrel, wherein the cutting bits are arranged in a predetermined bit pattern via a bit location system and patterned cutting...

A rotary cutter having a plurality of flights each having a tool holder receiving pocket extending radially inwardly from an outer surface of the flight. Each receiving pocket has a mounting socket at the innermost portion of the pocket which securely positions a tool holder, the tool holder being retained in the socket by a fastener.

Cutting bit holding elements removably receiving cutting bits are secured to a cutting assembly used in a roadway surface reclaiming machine. The cutting assembly includes a driven member having a surface, typically cylindrical, rotatable in a cutting direction. The surface includes a plurality of recesses arranged in a preselected pattern, each recess being defined by a generally circular upper edge and including a bottom surface depressed below the driven member rotatable surface. Each cutting...

A cutting drum for a scarifying milling machine includes a rotatable drum having a generally cylindrical outer surface, and a plurality of flight blocks mounted onto the outer surface of the drum, defining a helical flight extending therearound. Each of the flight blocks includes a slot and at least one pocket formed therein. Each slot is generally rectangular and adapted to receive a tool holder. Each flight block includes a tool holder, having a generally rectangular body, removably mounted wi...

A cutting roller for a mining machine including a closure ring arranged to face the workings and a tubular body member carrying a plurality of helical blade coils provided with bit holders furnished with cutting bits. The cutting roller has a number of charging coils arranged on the outer surface of the body member and extending midway of the blade coils and in parallel thereto. All the charging coils extend about the outer surface of the body member with an equal angle of inclination.

A spiral vane shearer disc capable of manufacture by simpler techniques than those currently employed as an outer end of a drum, around the external periphery of which is welded a helical vane, provided at one end with a tire, the latter having a plurality of preformed, spaced apart, blind pockets, each adapted to receive a pick box. This construction eases the welding operation while gives improved transmission of loading from the picks to the disc.

A grinder comprising an axle; a multiplicity of grinding teeth; and a plurality of grinding teeth suspending discs; the grinding teeth suspending discs being fixedly attached to the axle; each grinding tooth being fixedly attached to one of the grinding teeth suspending discs; the grinding teeth suspending discs fixedly suspending the grinding teeth around the rotatable axle; the grinding teeth suspending discs positioning the grinding teeth in an ellipse, so that each ellipse has a size, a shap...