Abstract: Arrangement for fixing brush elements (9, 10) to a rotatable brush frame formed of shaft (3) and flanges fixed to it and in which assembly the direction of bristles (9) is fitted essentially in the direction of the radius of the rotatable brush unit. Brash elements (9, 10) are locked on shaft (3) by means of oblong elements, as tubes (1) in shaft (3) direction, which tubes are from their both ends fixed to flanges in order to remain in place by means of parts in the flanges, which parts are from the end of tubes (1) fitted to the inside of the tubes.

Abstract: Arrangement for fixing brush elements (9, 10) to a rotatable brush frame formed of shaft (3) and flanges fixed to it and in which assembly the direction of bristles (9) is fitted essentially in the direction of the radius of the rotatable brush unit. Brash elements (9, 10) are locked on shaft (3) by means of oblong elements, as tubes (1) in shaft (3) direction, which tubes are from their both ends fixed to flanges in order to remain in place by means of parts in the flanges, which parts are from the end of tubes (1) fitted to the inside of the tubes.

Abstract: A feeding apparatus for a rock drilling machine (8). The feeding apparatus comprises a feeding cylinder (5) movable with respect to the feeding apparatus and a connecting cylinder (6) arranged around the feeding cylinder (5) movably in its longitudinal direction. To add a new drill pipe to a drill string, the drilling machine (8) is displaced by means of the connecting cylinder (6) and during the drilling movement by means of the feeding cylinder (5).

Abstract: An apparatus for storing drill rods, comprising two drill rod cartridges each comprising a rotating rotor provided with finger boards, guides for guiding the drill rods into gaps formed by the finger boards circumferentially around the axis of the rotor. The rotors are arranged to rotate in opposite directions in such a way that projections in the finger boards of one rotor are positioned in alignment with gaps in the other rotor, the drill rods being positioned therebetween and then passed alternately with the rotor of the two cartridges along spirals to a circumference about the rotors.