Impact cylinder holding arrangement comprising an impact cylinder with an impact cylinder front plate arranged at a front end, a cylindrical piston skirt extending from the front end to a rear end and circumferentially surrounding an internal piston chamber, an impact cylinder rear plate closing the piston chamber at the rear end, a piston arranged in the piston chamber and longitudinally movable along a longitudinal axis between a forward stroke position and a rearward rest position, a firing pin relatively movably arranged in the impact cylinder front plate , a firing rod, an anvil or the like, a connection for supplying a fluid, in particular compressed air, as well as a valve for optionally filling of a pressurized air reservoir and actuating the piston for an impact release, wherein at the front end of the impact cylinder bolts are provided for fastening to a holding flange connected to a to a support body, in particular a boiler or the like, wherein the bolts are being in the form of screws having a screw shank with a screw thread and a screw head with a screw head diameter larger than the screw thread, CHARACTERISED IN THAT on the impact cylinder front plate or on a connecting plate which can be connected thereto, a fastening portion radially extending over an outer circumferential region of the impact cylinder front plate is provided for creating a flange-like mounting portion which forms a mounting plane for abutment against the holding flange , THAT in the mounting portion at least two diametrically opposite through-holes are formed which extend transversely to the fastening plane and are designed for the screw shank of the screws to be inserted through them, THAT the through-holes comprise rotating guides laterally leading into them and THAT the holding flange comprises threaded holes for screwing in the screws. comprising an impact cylinder with an impact cylinder front plate arranged at a front end, a cylindrical piston skirt extending from the front end to a rear end and circumferentially surrounding an internal piston chamber, an impact cylinder rear plate closing the piston chamber at the rear end, a piston arranged in the piston chamber and longitudinally movable along a longitudinal axis between a forward stroke position and a rearward rest position, a firing pin relatively movably arranged in the impact cylinder front plate , a firing rod, an anvil or the like, a connection for supplying a fluid, in particular compressed air, as well as a valve for optionally filling of a pressurized air reservoir and actuating the piston for an impact release, wherein at the front end of the impact cylinder bolts are provided for fastening to a holding flange connected to a to a support body, in particular a boiler or the like, wherein the bolts are being in the form of screws having a screw shank with a screw thread and a screw head with a screw head diameter larger than the screw thread, CHARACTERISED IN THAT on the impact cylinder front plate or on a connecting plate which can be connected thereto, a fastening portion radially extending over an outer circumferential region of the impact cylinder front plate is provided for creating a flange-like mounting portion which forms a mounting plane for abutment against the holding flange , THAT in the mounting portion at least two diametrically opposite through-holes are formed which extend transversely to the fastening plane and are designed for the screw shank of the screws to be inserted through them, THAT the through-holes comprise rotating guides laterally leading into them and THAT the holding flange comprises threaded holes for screwing in the screws. <EOS>