The selection of blade material and geometry is a critical factor in achieving optimal guillotine shearing machine performance, as the correct blade material, hardness, and edge configuration directly influence cut quality, tool life, and production efficiency. Blade material selection varies by application, with high-carbon alloy steel and tungsten carbide-coated steel providing the hardness and wear resistance necessary for long service life in high-volume production environments. Our guillotine shearing machines utilize high-strength alloy cutters such as 6CrW2Si and Cr12MoV that can meet the requirement of impacting load and high wear resistance generated when cutting plates. For guillotine shearing machines, the upper blade typically has four cutting edges and the bottom blade has four cutting edges, providing twice the service life of two-blade edge designs by allowing operators to rotate blades to a fresh cutting edge when the active edge becomes dull. This feature means the blade can be turned three times before grinding for increased production life. The blade gap is the most critical parameter for cut quality and should be adjusted based on material thickness and type. For mild steel, the gap is typically maintained at 5-10% of plate thickness; for stainless steel, 7-12% clearance is recommended to prevent work hardening; for aluminum, tighter clearances of 3-5% are used to prevent burr formation. On CNC guillotine shearing machines, the blade gap can be set automatically by motor, with the controller adjusting the gap based on input material specifications. The position of the lower blade can be adjusted to ensure the equilibrium of the gap after regrinding. Regular blade inspection for dullness, nicks, or chips prevents quality degradation, with worn blades characterized by increased burr height, tapered cuts, or excessive cutting force requirements. Blade sharpening intervals vary by material type and production volume, with premium blades maintaining edge integrity for many strokes between sharpening intervals. The quick manual blade gap adjustment is located at the front of the machine on 6mm models, or at the rear of the machine for 12mm models. Blade gap adjustment ranges from 0.05mm for very light sheet thickness and progressively increases up to the maximum blade gap required for heavier shear capacities. Contact our blade specialists for guidance on blade selection and maintenance optimized for your specific material types and production requirements.