... form, conic form and arc, it adopted Japan hydraulic technical.Top roll can does vertical and level motion, up and down, parallel ... self-aligning bearing .two cylinders provide the pressure for upper roll bending , main cylinder working pressure is 20 Mpa ,max ... HB220-280 it composed of down of roll, down roll bearing pedestal, down roll input gear, down roll, glide bearing. Down bearing adopt SF ...