| 摘要 |
An object of the present invention is to provide a shank attachment device capable of transmitting a comparatively high rotational torque and reducing in size. A shank attachment device is configured to attach a core drill (50) to a rotating portion of a drill device and includes an arbor (1) and a shank (2). The arbor (1) is detachably attachable to the rotating portion. The arbor (1) and the shank (2) are detachably attachable to each other. The shank (2) is detachably attachable to the core drill (50). A stopper member (17) of the arbor (1) engages with a stopper groove (21A) of the shank (2) to stop a movement of the shank (2) in an axial direction away from the arbor (1). A rotational torque of the arbor (1) can be transmitted to the shank (2) by engaging a first engaging portion (12G) of the arbor (1) with a first engaged portion (20G) of the shank (2). The shank (2) contacts the arbor (1) to stop the movement of the shank (2) in the axial direction toward the arbor (1). |
