Abstract: A rotation apparatus for a boom of a mining vehicle includes a rotation device having an axial central axis. The rotation device has a housing and an inner manifold having a tube-like structure with a space within, wherein the inner manifold is arranged concentrically inside the housing. The housing is arranged to rotate around the axial central axis and the housing includes a housing channel. The inner manifold has a fluid channel having a fluid inlet for receiving fluid from the boom, and the fluid channel is connected to the housing channel for forming a fluid conduit through the rotation device.

Abstract: A scraper, rock drilling unit, and a method of cleaning a feed beam of a rock drilling unit is provided. The scraper includes a scraper element and a bracket mountable to the feed beam. The bracket provides the scraper element with a floating support. There is at least one force element provided for generating a force for moving the scraper element in relation to the bracket.

Abstract: A drilling boom and rock drilling rig. The drilling boom includes a basic boom part, a distal end of which is provided with a front joint assembly of a wrist. The wrist connects a feed beam assembly to the basic boom part. The wrist has three joints, which are a roll-over joint, a feed tilt joint and a feed swing joint. The order of the joints of the wrist is optimized when the joints are in the mentioned order. The rock drilling rig is provided with one or more such drilling booms provided with face drilling units or bolting heads.

Abstract: A rock drilling machine, rock drilling rig and method of measuring physical features during rock drilling is provided. The rock drilling machine includes one or more sensing devices, which are arranged in connection with a bendable sensing cord. The sensing cord is fed via a feed passage to a flushing passage of a drilling tool.

Abstract: A feed beam, a rock drilling unit and to a method of manufacturing a feed beam is provided. The feed beam includes a basic profile element, which has two or more superimposed material layers. At least one of the material layers may be made of a composite material.

Abstract: An apparatus and method of determining position of a drilling tool during drilling is disclosed. The apparatus includes a magnetic source mounted to a rotating drilling tool and at least three magnetometers, which are located outside a drilled hole. Sensing data of the rotating magnetic field is transmitted from the magnetometers to a control unit (CU) provided with a position calculation algorithm. The control unit is also provided with pose data of the magnetometers. The control unit compares the received sensing data and determines phase angles from the sensing data. The algorithm utilizes the phase angles and the known positions of the magnetometers when calculating the position.

Abstract: An apparatus and method of determining the position of a drilling tool during drilling is provided. The apparatus includes a magnetic source mounted to a rotating drilling tool and at least two magnetometers, which are located outside a drilled hole. Sensing data of a rotating magnetic field is transmitted from the magnetometers to a control unit provided with a position calculation algorithm. The control unit is also provided with position data of the magnetometers and a reference position of the drilling tool. The control unit compares the received sensing data when the drilling tool is in the reference position and when being moved to a new position. Phase angles are then detected from the sensing data. The algorithm utilizes the phase angles and the known positions of the magnetometers and the reference point when calculating the changed position.

Abstract: A rock drilling machine, rock drilling rig and method of measuring physical features during rock drilling is provided. The rock drilling machine includes one or more sensing devices, which are arranged in connection with a bendable sensing cord. The sensing cord is fed via a feed passage to a flushing passage of a drilling tool.

Abstract: A drilling boom and rock drilling rig. The drilling boom includes a basic boom part, a distal end of which is provided with a front joint assembly of a wrist. The wrist connects a feed beam assembly to the basic boom part. The wrist has three joints, which are a roll-over joint, a feed tilt joint and a feed swing joint. The order of the joints of the wrist is optimized when the joints are in the mentioned order. The rock drilling rig is provided with one or more such drilling booms provided with face drilling units or bolting heads.

Abstract: A feed beam, a rock drilling unit and to a method of manufacturing a feed beam is provided. The feed beam includes a basic profile element, which has two or more superimposed material layers. At least one of the material layers may be made of a composite material.