A robotic actuator assembly is disclosed. The robotic actuator assembly comprises a robotic system. The robotic actuator assembly also comprises a mounting portion selectively engageable with a drive assembly, an end effector, and an elongate shaft assembly. The robotic actuator assembly further comprises a transmission operably supported by the mounting portion. The transmission is configured to operably interface with the rotatable drive element of the drive assembly to receive a rotary output motion from the drive assembly.