| 摘要 |
PURPOSE:To cope with change of journal diameter, with no hand operated exchanging required, in addition to, as a matter of course, automatic exchanging in response to change of pin stroke. CONSTITUTION:In response to change of pin stroke of a crankshaft, the amount of eccentricity of a chuck body 3 with respect to a main shaft 1 is automatically changed by engaging with a driving coupling 11 of an automatic pin stroke changing device, rotatingly indexing a stopper 10, actuating a wedge member 9 for advance or retraction and moving a chuck supporting member 4 in the radial direction restricted within the stopper 10. Thus, no hand operation is required to exchange stages. |
