A milling system for a milling machine includes at least one cutting assembly configured to be coupled to a drum. Each of the cutting assemblies includes a base portion and an impact portion. The base portion includes a standoff coupled to the drum, a first base block coupled to the standoff, and a second base block coupled to the standoff at a position upstream of the first base block in a direction of rotation of the drum and at angle from the first base block. The impact portion includes a cutting bit and a tool holder coupled to the first base block, and a protective element coupled to the second base block.

Disclosed is a chisel in the application. The chisel includes a chisel end, a chisel holding portion, a holding seat, a limit disc, a hole having an annular surface formed around a central axis L of the limit disc, the limit disc being provided with at least one circle of groove in one side thereof, the groove being penetrated by the hole, the limit disc having a support surface and a first end surface, the groove being transitioned from the support surface to the first end surface, the holding seat being provided with a support portion, and the groove being engaged with the support portion. The chisel in the application may maintain the optimal rotary cutting performance and transmit the working pressure more effectively during operation, which may prolong the service life of the chisel.

Disclosed is a chisel with double limit discs. The chisel includes a holding seat and a bit mounted on the holding seat, the bit including a head and an extension provided on the lower side of the head, a first limit disc and a second limit disc arranged up and down are mounted between the holding seat and the head, the middle of the first limit disc having a first mounting through hole, and the middle of the second limit disc having a second mounting through hole, the second limit disc being partially concaved or partially convexed with the first limit disc. For the chisel, the service life of the holding seat and the bit are prolonged, the coaxiality between the chisel position and the holding seat position is maximized guaranteed, and the chisel may maintain the optimal rotary cutting performance during operation.

A system includes a carrier assembly, a replacement tool movably supported by the carrier assembly, and a sensor configured to capture sensor data associated with a wear part removably connected to a rotatable drum. The system also includes a controller configured to receive the sensor data from the sensor, and identify the wear part using the sensor data. In such a system, the carrier assembly is configured to move the replacement tool such that an axis of the replacement tool is substantially collinear with an axis of the wear part. Additionally, the replacement tool is configured to remove the wear part from the drum while the axis of the replacement tool is substantially collinear with the axis of the wear part.

A system includes a carrier assembly, a replacement tool movably supported by the carrier assembly, and a sensor configured to capture sensor data associated with a wear part removably connected to a rotatable drum. The system also includes a controller configured to receive the sensor data from the sensor, and identify the wear part using the sensor data. In such a system, the carrier assembly is configured to move the replacement tool such that an axis of the replacement tool is substantially collinear with an axis of the wear part. Additionally, the replacement tool is configured to remove the wear part from the drum while the axis of the replacement tool is substantially collinear with the axis of the wear part.

A tool bit assembly includes a shank having an elongated shaft, an intermediate portion extending from the shaft, a head extending from the intermediate portion, and a tool portion extending from the head. The assembly includes a retainer with a body defining a hollow shaft configured to receive at least a portion of the elongated shaft of the shank therethrough, and a washer defining an opening extending from a first end to a second end of the washer, and the washer having at least a first step and a second step. The opening of the washer is configured to receive at least a portion of the intermediate portion of the shank therethrough. The first step is configured to abut a bottom surface of the head of the shank, and the second step is configured to abut a first shoulder of the intermediate portion of the shank.

The invention relates to an earth working machine and to a method for wear-optimized operation of such an earth working machine. Provision is made in this context that machine parameters with which the earth working machine is operated are adapted, in consideration of material properties of the substrate to be worked, in such a way that favorable wear behavior exists for the earth working tools being used.

The invention relates to an earth working machine and to a method for wear-optimized operation of such an earth working machine. Provision is made in this context that machine parameters with which the earth working machine is operated are adapted, in consideration of material properties of the substrate to be worked, in such a way that favorable wear behavior exists for the earth working tools being used.

The invention relates to an exchangeable wearing part of an arc welding torch, said wearing part being intended to be arranged in the region of an end, provided for carrying out a welding process, of the arc welding torch, wherein the wearing part is provided with a thread on an outer lateral surface and/or on a boundary wall of a recess, an improvement in heat transfer properties and, when such components are conducting, also improved power transmission properties are intended to be achievable. To this end, the invention proposes that, in the direction of a longitudinal axis of the wearing part, a first conical portion, having the thread provided for fastening the wearing part, of the lateral surface or of the boundary wall is followed, on the same lateral surface or boundary wall, by a thread-free second conical portion of the lateral surface or of the boundary wall.