Abstract: A damping device for inserting into a housing of an impulse producing drill machine, for damping Shockwave reflexes from a drill string connected to the drilling machine, is distinguished in that a first damping piston (7) for direct or indirect action against the drill string and for applying a pressure in the direction of the drill string an a second damping piston (9) for applying pressure in the direction against the drill string against a fixed stop (11) arranged in the housing, wherein the first (7) and the second damping piston (9) are arranged to co-operate for joint damping action with a drill bushing or shank adapter in a certain relative position. The invention also concerns a drilling machine.

Abstract: The invention relates to a drill bushing for engagement with a drilling steel, wherein said drill bushing (2) has contact surfaces (4) for contact with a drilling steel (1), said contact surfaces (4) having interior, inwards curved shapes, whereby edge abutment of a drilling steel (1) against said contact surfaces (4) is avoided. By way of the invention, a better wear picture is obtained for the shank of a drilling steel.

Abstract: A rock drilling machine (1) having, on a machine housing (2), first attachment means on a first attachment side (13) for its fastening to a slide member which is movable back and forth along a feed beam, said attachment means including a contacting surface (17) for co-operation with contacting means supported by the slide and fastening means (18, 19) for the engagement with fasteners co-operating with the slide. The machine is distinguished by the rock drilling machine (1) being provided also with second attachment means on a second attachment side (15), said second attachment means being configured similarly to the first attachment means, including a contacting surface (17) and fastening means (18, 19), so as to allow the rock drilling machine (1) to be fastened to the slide member also with the second attachment means. The invention also concerns a rock drilling system.