An assembly (30) for a drug delivery device (1) is provided, the assembly (30) comprising an actuator (16) which is configured to perform a setting movement in a proximal direction in order to set a dose of a drug, and which is configured to perform a dispense movement in a distal direction in order to dispense a dose of a drug. The assembly (30) further comprises stop mechanism (40) acting after a maximum amount of a drug has been delivered, which is configured to axially constrain the setting movement of the actuator (16) such that the setting of a dose is inhibited, wherein a limited axial movement of the actuator (16) is allowed.
