Abstract: The high precision rolling design utilizes a high speed hydraulic roll position control along with a high accuracy roll gap measurement. The lower work roll position is fixed and the upper work roll is positioned by a hydraulic roll force cylinder using an inner and outer control loop. The inner loop is a cylinder position control that moves the upper work roll. The outer loop uses a measurement of the work roll gap to trim the inner cylinder positioning control. Both control loops coordinate together to provide a high precision and even strip thickness tolerance to +/?0.15 mils or less. Both sides of the upper work roll are controlled separately to achieve the overall tolerance goal.