abstract of the disclosure a surgical instrument system that includes a housing and a rotatable drive shaft, a motor operably coupled to the drive shaft, and a plurality of replaceable end effectors that can be connected to the housing. each replaceable end effector includes a drive screw that is turned a fixed number of revolutions by the motor-driven rotatable drive shaft when the end effector is connected to the housing. each end effector further comprises a firing member operably coupled with the drive screw of the end effector. the drive screw is configured to displace the firing member over a firing length as a result of the fixed number of revolutions. in certain embodiments, each replaceable end effector can include a drive screw with a thread pitch set to the firing length divided by the fixed number of revolutions. ********************* Summary Summary Patent Summary: "Surgical instrument system including replaceable end actuators". A surgical instrument system is provided which includes a housing and a rotary drive rod, a motor operably coupled to the drive rod, and a plurality of replaceable end actuators that may be connected to the housing. each replaceable end actuator includes a drive screw that is rotated a fixed number of revolutions by the motor driven rotary drive rod when the end actuator is connected to the housing. each end actuator additionally comprises a triggering element operably coupled to the end actuator drive screw. The drive screw is configured to move the trigger element over a trigger length as a result of the fixed number of revolutions. In certain embodiments, each replaceable end actuator may include a drive screw with a thread pitch adjusted to the firing length divided by the fixed number of revolutions. 23449766v1 1/1 23449766v1abstract of the disclosure a surgical instrument system that includes a housing and a rotatable drive shaft, a motor operably coupled to the drive shaft, and a plurality of replaceable end effectors th
