The KR 4 R600 is designed for a rated payload of 3 kg in order to optimize the dynamic performance of the robot. The maximum payload of 4.63 kg applies only if the position of the center of mass is 0 mm and a supplementary load optimized for the load case is mounted. The specific load case must be verified using KUKA.Load or KUKA Compose. For further consultation, please contact RSI Support.