A drilling tool is configured to perform drilling and/or percussive work on materials such as stone, concrete and/or reinforced concrete. The drilling tool has a fastening region and a working region. The working region has a working body and at least one cutting element projecting axially and/or radially in relation to the working body. The at least one cutting element has at least one first cutting edge and at least one second cutting edge. The at least one second cutting edge is configured to serve as a replacement cutting edge and/or as an auxiliary cutting edge, and the at least one second cutting edge is set back, at least partly, in relation to the at least one first cutting edge of the drilling tool, axially along a longitudinal axis of the drilling tool, in a direction towards the fastening region.

A robotic drilling apparatus is described which has been adapted for drilling holes in ceilings and walls on a construction site. The apparatus (100) comprises a robotic arm (110) mounted to a substructure (112), the substructure comprising a lifting mechanism arranged to lift the robotic arm to a working position, wherein the robotic arm has a base end (110a) and a movable end (110b), the base end being mounted to an upper surface (114) of the lifting mechanism and the movable end being capable of movement with respect to the base end in a three dimensional space, wherein the robotic drilling apparatus further comprises a mount (120) provided on the movable end for holding a drilling device (122) and a control unit (134) for controlling the operation of the robotic arm. The lifting mechanism preferably comprises a scissor-jack lifting platform. The robotic arm (110) and any support structure (134) for the robotic arm weighs less than 43 kg, and preferably individually weigh less than 23 kg.

The invention concerns a drill bit for percussion drilling or impact drilling use for cutting reinforcing steel in concrete, wherein the drill bit has a substantially hollow-cylindrical carrier body extending along a geometric drill bit axis, wherein the carrier body has at least one chisel tooth with a substantially radially extending first chisel edge. It is proposed that the first chisel edge is arranged in a middle portion of the chisel tooth, in particular precisely centrally, in the circumferential direction, and the chisel tooth has a second chisel edge extending substantially tangentially to the circumferential direction of the drill bit.

A method for production and/or storage of a consumable liquid is provided. The method includes (i) providing a liquid container, which is open on one side and has a container wall with an inner wall surface, where the inner wall surface is formed at least partially as a surface of a solid natural stone; (ii) cooling down at least a partial section of the liquid container with respect to the temperature of the surrounding atmosphere; (iii) introducing a liquid into the liquid container that has been cooled down according to step (ii); and (iv) initiating a chemical and/or biochemical conversion of the liquid that has been filled in, such as fermentation or a conversion of sugar to alcohol, for generating the liquid or a pre-product, wherein during the conversion no further measure or process for cooling the liquid container and/or the liquid residing therein is, respectively, taken or performed.

The invention relates to a carbide insert (2) for a rock drill (1), which is configured as a non-percussively operating twist drill with a cylindrical drill body (11) and a working end (13) having the carbide insert (2), the carbide insert (2) having two cutting lips (22) which are radially opposite one another relative to an axis of drill rotation (d) and are arranged at an angle to one another to form a centering tip (21) and with each of which a peripheral conveyor spiral (14) may be associated. To be able to introduce a drilled hole more quickly, easily and simply and with less risk of damage into a workpiece of rock, rock-like material, hard plastics, glass or the like, it is proposed that the cutting lips (22) be configured asymmetrically to one another, wherein at least one of the cutting lips (22) defines over its radial profile, in a central region spaced from its radial ends, a tip (23) projecting in the drilling direction (b).

A dust suction drill includes: a drill tip with cutting edge portions; a shaft joined to the drill tip and configured to rotate about an axis; and a dust suction passage that is generated when the cutting edge portions rotate, the dust suction passage being formed inside the shaft. The cutting edge portions are provided on a distal end surface of the drill tip and spaced apart from each other in a circumferential direction. Cutting edges, each of which is formed by a joint ridge between a rake face and a relief face of a corresponding one of the cutting edge portions, are arranged radially, and at a center of the drill tip, form a chisel point, which is a pointed end. A dust suction hole, which communicates with the dust suction passage, is formed in the rake face or the relief face closely to the chisel point.

A drill bit includes a tool body having a main body in the form of a cylinder. A chip removing structure is provided on the main body. The tool body has a distal end provided with a clamping slot and a cutter inlaid in the clamping slot. The cutter has at least two blade portions arranged circumferentially on the distal end of the tool body and extending radially relative to the tool body. Each of the blade portions has a front side along the drill bit's rotating direction and a back side against the rotating direction. The clamping slot covers the back side of one blade portion by an area larger than that used to cover the front side of the same blade portion.

A drilling tool, in particular a rock drilling tool, for a portable machine tool includes a drill head, a drill shaft connected to the drill head, and a rotational axis. The drill head in one embodiment is a hard metal drill head, and the drill shaft in one embodiment is connected integrally with the drill head. The drill shaft is configured as one piece, has a guide section with guide groove winding in a spiral-shaped about the drill shaft for transporting away drilling dust, and has a securing section that is configured to detachably secure the drilling tool to a machine tool. The guide section has a diameter reinforcement at a drill head support region of the guide section neighboring the drill head.

A method for creating a weep hole is disclosed. The weep hole is drilled in an uncured, concrete, hollow core structural component having one or more external surfaces and one or more internal surfaces. The weep hole is drilled using a drilling apparatus comprising a drill, a rotating drill bit with an internal fluid passageway, a power source, and a pressurized fluid source. Loose, uncured concrete material deposited near the weep hole on the one or more internal surface as a result of drilling the weep hole is removed by releasing pressurized fluid which flows from the pressurized fluid source, through the drill and the rotating drill bit.

A robotic drilling apparatus is described which has been adapted for drilling holes in ceilings and walls on a construction site. The apparatus comprises a robotic arm mounted to a substructure, the substructure comprising a lifting mechanism arranged to lift the robotic arm to a working position, wherein the robotic arm has a base end and a movable end, the base end being mounted to an upper surface of the lifting mechanism and the movable end being capable of movement with respect to the base end in a three dimensional space, wherein the robotic drilling apparatus further comprises a mount provided on the movable end for holding a drilling device and a control unit for controlling the operation of the robotic arm. The lifting mechanism preferably comprises a scissor-jack lifting platform. The robotic arm and any support structure for the robotic arm weighs less than 43 kg, and preferably individually weigh less than 23 kg.