An arrangement includes at least one drill bit and at least one limit stop for a drilling core, or parts of a drilling core, forming in the course of drilling. The at least one limit stop has at least one fluid opening transverse to an axis of rotation of the at least one drill bit, and the at least one limit stop has a central through-hole for receiving a centering pin.

A shroud for a dust extractor comprises: a body portion including a tubular housing forming a passageway and having a first and second inlets defining first and second openings; an engaging portion including a tubular housing forming a passageway, the tubular housing connecting to a third opening formed through a wall of the body portion to connect the passageway of the engaging portion with the passageway of the body portion on one end, and including a third inlet defining a fourth opening on another end; and a seal mounted in the second inlet of the body portion, the outer edge of the seal being attached to the periphery of the second inlet, the seal projecting radially inwardly towards the longitudinal axis of the tubular body.

A method for processing a drilling location in a confined area of a workpiece along a drilling axis A using an end effector is disclosed. The method comprises positioning the end effector relative to the drilling location of the workpiece, clamping the workpiece between a clamp of the end effector and a pressure foot of the end effector, wherein the pressure foot supports the clamp movable relative to the pressure foot, and drilling the workpiece with a flat angle drill of the end effector.

A dust collector includes body, a dust-storing part, a sliding part, a dust-transfer passage, and a biasing member. The sliding part is held by the body to be slidable in a specified axial direction and has a suction port. The dust-transfer passage connects the suction port and the dust-storing part. The biasing member biases the sliding part in a first direction of the axial direction. The sliding part is configured to be normally held in an initial position in which the sliding part protrudes from the body by a specified length in the first direction, and to be moved in a second direction opposite to the first direction against the biasing force when pressed in the second direction. The dust collector includes a cushioning member configured to be interposed between the body and the sliding part in the axial direction when the sliding part is placed in the initial position.

A dust collector for use with a power tool comprises a housing, a telescoping suction pipe coupled to the housing, a suction fan positioned in the housing and operable to generate a vacuum in the suction pipe, a dust container coupled to the housing and positioned upstream of the fan, a filter at least partially arranged in the dust container, and a filter cleaning mechanism. The filter cleaning mechanism includes an anvil, a striker moveable between a first striker position, in which the striker is spaced from the anvil, and a second striker position, in which the striker is in contact with the anvil. The filter cleaning mechanism further includes an actuator moveable between a first actuator position and a second actuator position, in which the actuator is moved closer to the anvil than in the first position, and a first spring biasing the striker toward the anvil.

A debris collection assembly includes a jig and an adapter insert. The jig includes a front wall and a back wall opposite the front wall. The front wall defines an aperture therethrough. The back wall defines an adapter opening that aligns with the aperture. The jig includes a vacuum port and defines an interior cavity that fluidly connects the aperture, the adapter opening, and the vacuum port. The adapter insert is removably loaded through the adapter opening into the interior cavity of the jig. The adapter insert defines an orifice sized to receive a drill bit and allow the drill bit to extend through the aperture in the front wall to drill into a work piece. Negative pressure at the vacuum port draws airflow through the interior cavity and captures debris generated from drilling.

An integrated drill chuck for installing mine roof bolts includes a single integrated piece, the single integrated piece including a body defining a receiving cavity, where the receiving cavity is configured to receive and secure a bit having a square-shaped end and a bit having a hex-shaped end. A drill for installing mine roof bolts is also disclosed. A method for installing mine roof bolts is also disclosed.

A drill removal device is provided for use with a scratch generating tool having a stationary member and a scrap generating workpiece engaging member that is moveable with respect to the stationary member. The debris removal device includes a bracket having a stationary member receiving portion for coupling the bracket to the power tool stationary member. A vacuum receiving portion of the bracket is provided for coupling the bracket to a vacuum source, and a passageway portion is provided for placing the stationary portion in fluid communication with the vacuum source. A variable tube bellows is configured for placement adjacent to the workpiece engaging member. The bellows includes a plurality of bi-stable pleats that are moveable between and stationarily positionable in each of an expanded position and a compressed position for permitting the user to vary the length of the bellows between, and fixedly positioned the length of the bellows at a plurality of different lengths.

A tool for roughening a borehole surface. The tool includes a coupling portion for clamping the tool; a tool head for machining the borehole surface; and an extraction duct. The coupling portion is disposed at a first end of a tool shank and the tool head at an opposite, second end of the tool shank. The tool head has a cutter disposed circumferentially on the tool head. The tool head has a slit, which passes through from one side to the other and which, starting from an end face of the tool head, extends axially along a longitudinal axis of the tool. The extraction duct extends at least partly axially along the longitudinal axis of the tool for extraction of drilling dust. The extraction duct, starting from the end face of the tool head, extends inside the tool shank and discharges circumferentially into a connecting opening in the tool shank.

An accessory for a hand-held power tool has a first air channel and a second air channel. In the first air channel, a first air stream for transporting dust particles is routed into a dust-collecting box. In the second air channel, a second air stream for transporting dust particles into the dust-collecting box or into a further dust-collecting box is routed.