Abstract: A workpiece holding device includes: a chuck including a chuck body, and a plurality of chuck claws openably supported on the chuck body and configured to hold a workpiece; an operation rod configured to drive the plurality of chuck claws for opening and closing with movement of the operation rod; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

Abstract: A machine tool includes: a hollow spindle including a hollow portion along an axial direction; a plurality of chuck claws openably mounted at a distal end portion of the hollow spindle, and configured to hold a workpiece; an operation rod inserted into the hollow portion of the hollow spindle in a movable manner, and configured to close the plurality of chuck claws with movement of the operation rod toward one side in the axial direction and open the plurality of chuck claws with movement of the operation rod toward the other side in the axial direction; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

Abstract: A machine tool includes: a hollow spindle including a hollow portion along an axial direction; a plurality of chuck claws openably mounted at a distal end portion of the hollow spindle, and configured to hold a workpiece; an operation rod inserted into the hollow portion of the hollow spindle in a movable manner, and configured to close the plurality of chuck claws with movement of the operation rod toward one side in the axial direction and open the plurality of chuck claws with movement of the operation rod toward the other side in the axial direction; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

Abstract: A workpiece holding device includes: a chuck including a chuck body, and a plurality of chuck claws openably supported on the chuck body and configured to hold a workpiece; an operation rod configured to drive the plurality of chuck claws for opening and closing with movement of the operation rod; and a measuring apparatus configured to measure an opening dimension of the plurality of chuck claws based on a movement amount of the operation rod.

Abstract: A machine tool is configured so that a working area in which a workpiece is worked using a tool can be monitored, and includes a cover that is provided to cover the working area, and isolates the inside of the machine tool that includes the working area from the outside, at least one camera that is provided to the inner side of the cover, and captures the inside of the machine tool, and a touch panel that is provided to the cover, wherein the touch panel includes a display panel and an input operation panel, and the display panel displays an image of the inside of the machine tool that has been captured by the at least one camera.

Abstract: A machine tool is configured so that a working area in which a workpiece is worked using a tool can be monitored, and includes a cover that is provided to cover the working area, and isolates the inside of the machine tool that includes the working area from the outside, at least one camera that is provided to the inner side of the cover, and captures the inside of the machine tool, and a touch panel that is provided to the cover, wherein the touch panel includes a display panel and an input operation panel, and the display panel displays an image of the inside of the machine tool that has been captured by the at least one camera.