Disclosed herein is a road surface crushing apparatus. The road surface crushing apparatus includes: a cylinder-shaped drum configured to be rotatably installed on one side of a main transportation means; a plurality of crushing units each formed to protrude from one side of the outer circumferential surface of the drum in an outward direction, and configured to crush a road surface to be repaired; and one or more cutting units each formed to extend from one side of one of both ends of the outer circumferential surface of the drum in a direction away from the outer circumferential surface of the drum, and configured to cut a boundary surface between the road surface to be repaired and a road surface not to be repaired; wherein when the drum is rotated, both a crushing operation of the crushing units and a cutting operation of the cutting units are simultaneously performed.

A cutter bit adapted to be fixed onto a working surface of a rotating drum of a milling, planing, mining or reclaiming machine is provided. The body of the cutter bit is generally formed of a hardened steel, the cutting surface may be a diamond composition fixed in a step in the upper end of the cutter bit. The cutter bit includes a cutting surface, and the cutting surface may include non-parallel side edges and an upper cutting edge parallel to a lower edge. The lower edge may be any length sufficient to inhibit unintended angular displacement of the cutting surface during operation of the working surface. Alternatively or in addition, the cutting surface may be defined by three edges to allow the cutting surface to be removed and repositioned in at least a second orientation.

The present invention is provided with a grinding block of dry grinding machine for grinding concrete and granite, the grinding block is assembled to a mill of the grinding machine, the grinding block comprises a fixing plate to fix the grinding block to the mill, wherein the fixing plate is welded with a grinding media, the grinding media comprises a plurality of grinding pieces, the grinding pieces are connected by a connecting strip or connecting strips arranged with space, the connecting strips with spaces divide with a plurality of air passages between two grinding pieces.

A product and method to eliminate blade spacers in blade heads or stacks that are formed by multiple blades fixed relative to one another including a plurality of spacerless blades wherein the spacerless blades include a blade core with a blade core thickness that is greater than a segment thickness of grinding and/or cutting segments fixed to the blade core to allow core-to-core contact between adjacent blades in the plurality of spacerless circular blades while also producing segments spacings in the plurality of segments between the adjacent blades without the need for blade spacers.

A cutting tool is provided. The cutting tool comprises a tip, a body and a shank. The tip has a tip radius and a tip length. The body has a body radius and a body length between the shank and a recess portion along a longitudinal axis of the body. The recess portion comprises a wall which forms a recess with a depth into the body for retaining a major part of the tip length within the recess. The body radius at half the depth of the recess does not exceed two tip radiuses. The tip is made of a hard metal alloy with a hardness of at least 1300 HV50 and the body is made of a steel alloy with a hardness of at least 450 HV30.

The invention relates to a bit holder for an earth working machine, in particular a surface miner, a road milling machine, or the like, having a holding projection that comprises a bit receptacle and/or carries a cutting element. In order to improve the operating reliability of an earth working machine, provision is made according to the present invention that the holding projection has, behind the cutting element or behind a receiving region of the bit receptacle in the tool advance direction, a wear protection element having a hard-material element in order to provide an emergency-mode property.

A system for performing interactions within a physical environment including a robot base that undergoes movement relative to the environment, a robot arm mounted to the robot base, the robot arm including an end effector mounted thereon and a tracking system that measures a robot base position indicative of a position of the robot base relative to the environment. A control system acquires an indication of an end effector destination, determines a reference robot base position, calculates an end effector path extending to the end effector destination and repeatedly determines a current robot base position using signals from the tracking system, calculates a correction based on the current robot base position, the correction being indicative of a path modification, and controls the robot arm in accordance with the correction to move the end effector towards the end effector destination.

A milling tool for milling a material is provided. The milling tool comprises a tool shank having an axis of rotation, and further comprises a tool head at one end thereof. The tool head comprises at least two tiers, each tier comprising a plurality of flutes extending circumferentially around the tool head. The tool head comprises superhard material and the tiers are axially displaced from each other and separated by a non-cutting portion of the tool head.