... type and serrated type bearing bar is 20 x 3 to 100 x 6; the specification of I-section type ... 7 x 4, etc. 2) Bearing Bar Pitch (center to center): 15, 30, 40, 60, 80, 90mm etc, or according ... to client's request and 30, 40, 60mm are recommended, ... America standard is available. 3) Cross Bar Pitch (center to center): 30, 38, 50, 76, 100mm etc, or according ...