The original connection between single and double roller adopted connecting shaft and bore which brought inconvenient on assembly and disassembly process.Now,we change the roller connection by using screws.From the direction of loading log,single roller rotation is anticlockwise while double roller rotation in clockwise.Roller rotation direction shown at the un-pattern part of the rollers.Special attention shall be taken during assembly and disassembly of the rollers.Principle as follow:disassembly direction of active roller is opposite to the roller peeling rotary direction,while passive roller disassembly direction is the same as roller peeling rotary direction.