SXB460 Semi-Auto Book Sewing Machine is one kind of book binding machines, by which the gathered signatures in order from the collecting machine can be sewed to from book blocks. SXB460 Semi-Auto Book Sewing Machine adopts step less change device, central lubricating system, parallel control spring for sewing frame and has safety guards on all moving parts. Featuring smooth running, low noise, easy adjustment of sewing format and reliable sewing quality, it is widely used for both paper-cover and hard-cover binding.