| 摘要 |
The marking tool has an arm (9) which extends parallel to the shaft (5), and is rotatable concentrically around the centering device relative to which it is axially displaceable. The free end of the arm carries the marking point. The tool also incorporates a cutting plane adjuster (13), and a mechanical component (15) for mechanical connection of the adjuster with the arm. The centering device is expandable to engage the inside of the pipe, the arm is fixed on a bearing bush (33) movable on the shaft, thus allowing partly the concentric rotation of the arm, and partly the axial displacement of the arm relatively to the shaft. The mechanical connector comprises a rod (41) extending radially outwards from the shaft, and connected to the latter for rotation in the cutting plane around it. The arm is displaceably located on the rod. |
