A tool to aid in the installation of a rock bolt assembly in a rock hole which includes a drive shaft having a proximal end, which is adapted to engage with a drilling rig, and a distal end which includes a recess which is adapted to receive a trailing end portion of the rock bolt and which has a first seat against which an axially pre-set component of the rock bolt assembly abuts, a tubular sleeve telescopically engaged with the shaft which has a first end, which is adapted to receive an axially moveable component of the rock bolt assembly and which has a second seat against which the axially moveable component abuts, and a second end, wherein the sleeve is reciprocally moveable relatively to the shaft between a biased forward position in which the axially pre-set component and the axially moveable component are spaced, and a retracted second position in which the axially pre-set component engages or connects to the axially moveable component.

The present disclosure provides a system to optimally set an anchor and a bullet within a bore hole. The anchor is comprised of at least two cutters connected to and positioned below spreading lamellae of the anchor. The cutters are comprised of a wide edge and a narrow edge, the wide edge having a width that is wider than the circumference of the spreading lamellae to facilitate the setting of the anchor. A space is also initially provided between each of the cutters and the bullet to reduce friction of anchor on the bullet during expansion. During setting, the spreading lamellae of the anchor spread radially over the bullet to set the undercut anchor within the pre-drilled bore hole. In another embodiment, the anchor is comprised of at least two angular cutters having a taper of several degrees to facilitate cutting through the cementitious material of the bore hole.

A tool aiding the installation of a rock bolt assembly in a rock hole includes: a drive shaft having a proximal end to engage with a drilling rig, and a distal end with a recess to receive a trailing end portion of the rock bolt and which has a first seat against which an axially pre-set component of the rock bolt assembly abuts; and a tubular sleeve telescopically engaged with the shaft with a first end for receiving an axially moveable component of the rock bolt assembly and which has a second seat against which the axially moveable component abuts, and a second end. The sleeve is reciprocally moveable relatively to the shaft between a biased forward position in which the axially pre-set component and the axially moveable component are spaced, and a retracted position in which the axially pre-set component engages or connects to the axially moveable component.

An undercut anchor 2; 30, which facilitates the formation of a corresponding undercut in a blind hole for receiving the undercut anchor 2; 30, is formed to independently cut or form this undercut by rotating and spreading the undercut anchor 2; 30. Furthermore, a setting tool for forming this undercut at the bottom of the blind hole in the joining partner is proposed. Finally, a method of forming an undercut at the bottom of a blind hole using the setting tool is disclosed.

A dauber assembly may comprise a manifold body comprising a first end configured to receive a nozzle, and a collar extending at least partially around the manifold body. The collar may comprise an inlet port. The manifold body may have one or more holes providing fluid communication between the inlet port of the collar and an outlet of a nozzle received by the first end of the manifold body.

An undercut anchor 2; 30, which facilitates the formation of a corresponding undercut in a blind hole for receiving the undercut anchor 2; 30, is formed to independently cut or form this undercut by rotating and spreading the undercut anchor 2; 30. Furthermore, a setting tool for forming this undercut at the bottom of the blind hole in the joining partner is proposed. Finally, a method of forming an undercut at the bottom of a blind hole using the setting tool is disclosed.

The self-undercut anchor with carbide tip is designed to create a drill hole and enlarging the lowermost end of said drill hole by means of a carbide tip or cutting portion. The carbide tip or cutting portion is positioned in such a way so as to not obstruct the setting of the anchor by means of the spreading lamellae. Once said lamellae have been positioned properly and forced downward, the self-undercut anchor is set in place.