Profile machining device comprising a process chamber for receiving a profile section (50, 60) during machining, said process chamber - having through-openings (4, 5) on opposing end faces for the introduction of the profile section (50, 60) into the process chamber respectively its removal therefrom, and - providing on the envelope-side at least one supply opening for a machining fluid, having a fluid supply unit associated with the supply opening on the exterior, through which supply opening the machining fluid reaches the process chamber, and having at least one collection chamber (7, 8) associated with the process chamber such that machining fluid exiting via the through-openings (4, 5) of the process chamber reaches the at least one collection chamber (7, 8) and exits from the collection chamber (7, 8) via at least one discharge outlet provided in the at least one collection chamber (7, 8), wherein the process chamber is elongate in shape with a length that is at least five times longer than a minimum internal cross-section, and wherein the length of said process chamber is determined such that at least in the central region of the process chamber the machining fluid flows around and/or coats entirely the profile section (50, 60), characterised in that the fluid supply unit has at least one ring inlet which is associated with the process chamber on the envelope-side, and in that on the process chamber a plurality of supply openings and/or at least one slot-shaped supply opening are distributed in the peripheral direction and are associated with the ring inlet such that the machining fluid reaches the process chamber via the ring inlet and the supply openings distributed on the envelope-side. - having through-openings (4, 5) on opposing end faces for the introduction of the profile section (50, 60) into the process chamber respectively its removal therefrom, and - providing on the envelope-side at least one supply opening for a machining fluid, having a fluid supply unit associated with the supply opening on the exterior, through which supply opening the machining fluid reaches the process chamber, and having at least one collection chamber (7, 8) associated with the process chamber such that machining fluid exiting via the through-openings (4, 5) of the process chamber reaches the at least one collection chamber (7, 8) and exits from the collection chamber (7, 8) via at least one discharge outlet provided in the at least one collection chamber (7, 8), wherein the process chamber is elongate in shape with a length that is at least five times longer than a minimum internal cross-section, and wherein the length of said process chamber is determined such that at least in the central region of the process chamber the machining fluid flows around and/or coats entirely the profile section (50, 60), characterised in that the fluid supply unit has at least one ring inlet which is associated with the process chamber on the envelope-side, and in that on the process chamber a plurality of supply openings and/or at least one slot-shaped supply opening are distributed in the peripheral direction and are associated with the ring inlet such that the machining fluid reaches the process chamber via the ring inlet and the supply openings distributed on the envelope-side.