Diameter and thickness of disc cutter:The size of the axial clearance reserved for the disc cutter of the longitudinal shear machine should be determined according to the thickness and strength of the shear strip. Generally, the ratio of tear zone to shear zone is about 2:1, and the suitability of the side clearance can be determined based on the color and roughness of the shear section: the section is smooth and shiny, but the side clearance is too small; Lead gray cross-section, slightly smaller side clearance; The cross-section is white with a slight lead gray, and the side clearance is appropriate; The cross-section is white and appears as granular and rough, with a large lateral gap. If the side clearance is too large, shear burrs may occur. If the side clearance is too small, it will cause excessive disc shear load, severe disc wear, and a short service life. During the production process, the side clearance values on both sides of the disc cutter should be as consistent as possible. Because the side with a larger side gap will have a larger indentation when cutting the local area, and the side with a smaller side gap will have a greater tensile force on the strip, resulting in shear sickle bending. Especially for steel plates (narrow steel strips) with a small ratio of plate thickness to plate width, the probability of sickle bending is relatively high& nbsp; Overlapping amount:Blade axis accuracy: Blade axis accuracy includes horizontal swing, vertical swing, and axial movement of the blade axis. Usually, the horizontal and vertical swing accuracy of the blade shaft is required to be within the range of; Within 0.005mm. The accuracy requirement for axial movement is within the range of; Within 0.005mm. The precision of the cutter shaft plays a very important role in achieving the stability of the side clearance of the cutter head and the deflection of the cutter head.