A protective wear sleeve for a cutting tool assembly that includes a solid body that has a shaft portion, a radial collar portion, and a central bore that defines a central axis. The shaft has a forward end and a rearward end, wherein the radial collar is integral with the forward end. The radial collar has a ring support surface that faces at least partially in an outward radial direction. The forward end of the shaft and the radial collar together define a tooth support surface that faces in a forward direction and has an outer diameter. At least one wear ring is disposed on the ring support surface and extends around the radial collar. The at least one wear ring has a hardness greater than that of the radial collar and has an outer diameter greater than that of the outer diameter of the tooth support surface.

A tool holder insertion device includes a frame extending from a proximal end to a distal end, the frame including first and second longitudinal arms extending between the distal end and the proximal end. The frame also includes a distal transverse arm connected to respective distal ends of the first and second longitudinal arms, a proximal transverse arm opposite the distal transverse arm, and an internal space extending from the distal transverse arm, the internal space forming an insertion opening. The tool holder insertion device also includes a drive assembly fixed to the frame, the drive assembly including a pushing surface that is movable within the internal space toward the distal end of the frame.

A bit removal device may include a support, an extractor coupled to the support, and an actuator. The support is configured to engage a bit holder from a front side of the bit holder. The extractor is configured to engage a bit from the front side of the bit holder. The actuator is configured to move the extractor relative to the support to extract the bit from the bit holder.

A method of removing cutting bits from a milling work machine includes engaging a cutting bit connected to a rotary drum of the machine with a bit removal tool, actuating the bit removal tool to disconnect the bit from the machine, sensing a plurality of characteristics of removing the bit from the machine, and determining that the bit has been disconnected from the machine based on the sensed characteristics.

An improved base block is disclosed for use mainly in road milling equipment, but also capable of use in trenching equipment and mining equipment. The base mounting portion is shortened in length from such prior art base blocks and has a reduced length device receiving portion extending therefrom that includes a bore therethrough. Rearwardly of the device receiving portion, the base mounting portion includes a reduced diameter semi-bore or curved wall capable of engaging a portion of the shank side wall of a standard length bit/holder shank. Additionally, an angled slot adjacent the rear of the device receiving bore increases access to the rear to aid removal of a bit/holder therefrom.

A bit holder includes a larger bit shank bore and an enlarged upper shank segment or band that provides an interference fit between the top of the shank and the top of a bore of a base block when the bottom of a body of the bit holder seats on the top of the base block. The bit holder further includes a lower shank segment being cylindrical, inwardly tapered, and/or outwardly tapered, the lower shank segment having a differential taper than a corresponding lower bore portion of the base block.

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.

A method of removing cutting bits from a milling work machine includes engaging a cutting bit connected to a rotary drum of the machine with a bit removal tool, actuating the bit removal tool to disconnect the bit from the machine, sensing a plurality of characteristics of removing the bit from the machine, and determining that the bit has been disconnected from the machine based on the sensed characteristics.

The invention relates to a tool for installing a bit on and/or deinstalling a bit from a bit holder system of a milling machine, in particular a road milling machine, having at least one initiator with which installation and/or deinstallation of a bit is initiated. Provision is made that the tool comprises a detection device having at least one counting device; and that the detection device is designed to detect a number of bits deinstalled using the tool and/or a number of bits installed using the tool. The invention also relates to a corresponding bit holder system and to a method for monitoring wear. With the tool and the bit holder system, additional information regarding bit changes that have been carried out is made available to a user.

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.