SX-460B sewing machine special for large size of books is developed and improved according to users’ requirement. The machine adopts the features of wide sewing range, stable operation, convenient operation, low noise, and safety design etc. Thin needle and dense needle sets design make the sewing job much more perfect. Automatic belt output and chain clamp function are adopted for books delivery to ensure sewing quality and stability. Frequency conversion speed control, electromagnetic clutch driving and electromagnetic brake for main machine are adopted. Also, sensor protection is equipped on the control button panel.