KR QUANTEC ultra K. The ultimate performance class for shelf-mounted robots. Extremely powerful, extremely stiff and precise, and yet just as streamlined and barely heavier than the shelf-mounted robots of the prime class. For cycle times up to 25% shorter, maximum path accuracy and high energy efficiency even in the high payload ranges. With a payload capacity of 120 kg and reach of 3,900 mm, the KR 120 R3900 ultra K redefines maximum performance for shelf-mounted robots.