Portable Machine tool for chip removal, designed primarily for axial alignment or realignment, of large bodies of cylindrical cavities bearing axial / symmetrical , developed mainly in length, inaccessible and / or manipulated by conventional machine tools. Designed to carry out " on-site "  jobs,  overcomes the inability and/ or difficulties, the nature of business / logistics of moving such large bodies and their connections or structural obstacles, the place of location. It allows the adjustment of the mold , gas pipelines, gas pipelines and aqueducts. From ø 700 mm to over 1200 mm