A retainer insertion and extraction tool that includes a shaft or handle, a retainer extraction pin at a distal end of the shaft, and a retainer receiving component at a forward end of the shaft. The retainer receiving component includes an annular, generally cylindrical, or cylindrical hammer face mounting, a hammer face, and a retainer capture base that includes a notch configured to receive a magnet and an extending leading edge that, in combination with the notch and magnet, is configured to receive and retain a retainer. The retainer receiving component is configured to insert the retainer into a groove of a bit by applying manual force to hammer face of the hammer face mounting. The retainer extraction pin is configured to remove the retainer from the groove of the bit by applying manual force to the forward end of the shaft, allowing the shaft to pivot against a fulcrum of a base block.

Mineral bits (10, 100) and associated mounts (30, 116, 200) for use during excavation and mining operations are disclosed. An exemplary bit (10) has a front region (12) and an opposite rear region (14) and comprises a head portion (16) and a mounting portion (18) secured to the head portion (16). The mounting portion (18) can be configured to be releasably retained by a mount (30). A rounded transition (22) disposed in the front region (12) of the bit between the head portion (16) and the mounting portion (18) provides a clearance (C) between the head portion (16) and the mount (16). Mineral bits (10, 100) disclosed can be inserted into and withdrawn from mounts (30, 116, 200) by linear and/or rotational movement.

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 unitary diamond bit/holder, tool, and/or pick assembly that includes a forward extension axially extending from a body of the bit/holder and a tungsten carbide ring mounted in an annular trough at a forward end of the body around the forward extension. A diamond tipped bit tip insert is positioned and brazed in a bore of the forward extension, a forward end of the forward extension extending axially above a base of the bit tip insert.

A unitary bit/holder assembly includes a bit tip insert having a diamond coated tip mounted thereon that is received in a transition member that is brazed onto a forward end of a bit holder. The forward end of the bit holder includes a trough onto which the transition member is mounted. The unitary bit/holder includes a standard length shank or a shortened length shank that can each be mounted into a shortened base block.

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.

Mineral bits (10, 100) and associated mounts (30, 116, 200) for use during excavation and mining operations are disclosed. An exemplary bit (10) has a front region (12) and an opposite rear region (14) and comprises a head portion (16) and a mounting portion (18) secured to the head portion (16). The mounting portion (18) can be configured to be releasably retained by a mount (30). A rounded transition (22) disposed in the front region (12) of the bit between the head portion (16) and the mounting portion (18) provides a clearance (C) between the head portion (16) and the mount (16). Mineral bits (10, 100) disclosed can be inserted into and withdrawn from mounts (30, 1 16, 200) by linear and/or rotational movement.

A bit holder that includes a front portion and a shank axially depending from the front portion. The front portion having an axial length that is less than the axial length of the shank. A combination bit holder and base block that includes the bit holder with the front portion having an axial length that is less than the axial length of the shank. The base block including a mounting portion and a device receiving portion, the device receiving portion including a length that is the same or less than a length of the mounting portion. The base block having a device receiving portion that includes a length shorter than a length of the mounting portion adapted to provide increased access to the rear of the bit assembly allowing the base blocks to be mounted closer to each other for micro-milling operations. Shortened bit holder shanks are reconfigured from prior art to provide increased holding power between the bit holder shank and base block bore.

The invention relates to a pick sleeve (10) including a head (12) and a shank (14). The head (12) includes a central part (20) and a bearing member (22) which is secured to the central part (20). The bearing member (22) is separable from the central part (20) in order to facilitate removal of the pick sleeve (10) from a holder (38). The invention extends to a tool (50) which is used in the removal of the pick sleeve (10) from the holder (38).

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.