Abstract: Pipe machining device in the form of a pipe cutting device, pipe gripping device, or pipe rectangular end facing device, including a non-rotating gripping device for gripping a pipe to be machined; a rotatable machining device and a rotatable, motor-drivable tool shaft placed in the rotatable machining device. The rotatable machining device is mechanically connected to the gripping device, and is placed so that it can be rotated at least 360° relative to the gripping device, around a rotation axis that is aligned with a pipe center axis of the pipe to be machined. The rotatable machining device is equipped with a cold-air blower device that has a pressurized air inlet and a pressurized air outlet such that the pressurized air outlet is used as a cold air outlet and directed onto the part of the tool that contacts the pipe during machining, blowing the tool with cold pressurized air.