An end-effector for a delta robot comprising actuated robot arms for coupling to the end-effector to allow moving the end-effector by the robot arms, the end-effector comprising - a housing having a vacuum connection for connecting to an external vacuum source, and having a main duct in fluid communication with the vacuum connection; - a hollow shaft mounted in the housing to be rotatable around a longitudinal axis of the hollow shaft, wherein the hollow shaft has a hollow interior, a proximal shaft opening at a proximal end (120.1) of the hollow shaft inside the housing to provide fluid communication between the hollow interior and the main duct, the hollow interior extends along the longitudinal axis of the hollow shaft to a distal end (120.2) of the hollow shaft, and the distal end of the hollow shaft projects from the housing, the distal end allowing for connecting a further device thereto and to pass vacuum from the interior of the hollow shaft and rotation by the hollow shaft to the further device, such as a pick-op device for picking up an object by vacuum suction; - a vacuum valve arranged in the main duct of the housing between the proximal shaft opening and the vacuum connection, wherein the vacuum valve provides for an open position to provide fluid communication between the proximal shaft opening and the vacuum connection to allow providing a vacuum in the hollow shaft when the vacuum connection is connected to a vacuum source and the vacuum valve provides for a closed position to close fluid communication between the proximal shaft opening and the vacuum connection; and - a motor attached to the housing for rotating the hollow shaft around its longitudinal axis with respect to the housing, wherein the motor is arranged in the housing around the longitudinal axis of the hollow shaft, the proximal shaft opening is transverse to the longitudinal axis of the hollow shaft and provides fluid connection between the interior of the hollow shaft and a main duct end section of the main duct, which main duct end section is adjacent to the proximal shaft opening and extends along the longitudinal axis of the hollow shaft, and the vacuum valve in the closed position closes on or in the main duct end section. - a housing having a vacuum connection for connecting to an external vacuum source, and having a main duct in fluid communication with the vacuum connection; - a hollow shaft mounted in the housing to be rotatable around a longitudinal axis of the hollow shaft, wherein the hollow shaft has a hollow interior, a proximal shaft opening at a proximal end (120.1) of the hollow shaft inside the housing to provide fluid communication between the hollow interior and the main duct, the hollow interior extends along the longitudinal axis of the hollow shaft to a distal end (120.2) of the hollow shaft, and the distal end of the hollow shaft projects from the housing, the distal end allowing for connecting a further device thereto and to pass vacuum from the interior of the hollow shaft and rotation by the hollow shaft to the further device, such as a pick-op device for picking up an object by vacuum suction; - a vacuum valve arranged in the main duct of the housing between the proximal shaft opening and the vacuum connection, wherein the vacuum valve provides for an open position to provide fluid communication between the proximal shaft opening and the vacuum connection to allow providing a vacuum in the hollow shaft when the vacuum connection is connected to a vacuum source and the vacuum valve provides for a closed position to close fluid communication between the proximal shaft opening and the vacuum connection; and - a motor attached to the housing for rotating the hollow shaft around its longitudinal axis with respect to the housing,