Blade is a part which is used in the centerless grinding machine. Blade is the pad of work pieces and it is used in processing round bar of crankshafts or bearings. You do not need of attaching work pieces on a centerless grinding machine. Different from cylindrical grinding machine which holds and makes rotate of work pieces with center in both sides, you do not need a lot of times for chucking, thus you can highly expect the operating efficiency. Also different from a work with cylindrical grinding machine and drawing process, the blade keeps the work pieces totally, so you can keep the same accuracy through a product.