high-precision custom blades

In slitting production, many users encounter this puzzle: the same equipment and the same set of circular blades work perfectly on 0.5mm material, but when switching to 1.5mm of the same material, problems such as burrs, tearing, and even chipping occur. They then ask: when shearing different thickness materials with circular blades, is separate customization of the edge necessary? Mingbai Mechanical Tool Technology Co., Ltd. answers: Not necessarily every time, but when the thickness difference exceeds a certain range, customization is necessary. This article provides a detailed analysis.   1. The Impact of Thickness Differences on Edge Requirements   1. Relationship between edge angle and cutting resistance   The edge angle (wedge angle) determines the sharpness and strength of the blade:   · Thin materials (<0.5mm) require a small angle (18°-22°) to maintain sharpness; otherwise, they won't cut through. · Thick materials (>2mm) require a large angle (25°-30°) to ensure edge strength; otherwise, chipping occurs.   If circular blades for thin sheet slitting are used to cut thick plates, the edge is too sharp and prone to chipping. If high-speed steel blades for thick plate shearing are used to cut thin sheets, the edge is too dull, resulting in large burrs on the cut edge.     2. Edge radius and material deformation   The edge radius (passivation value) determines the degree of extrusion when penetrating the material:   · Thin materials require an extremely small edge radius (R≤0.005mm) to minimize material deformation. · Thick materials require a slightly larger edge radius (R=0.01-0.02mm) to enhance edge impact resistance.   3. Chain reaction of gap and overlap changes   When thickness changes, the blade gap and overlap must be reset. However, if the edge design is unreasonable, even adjusting parameters will make it difficult to achieve the ideal cutting effect.     2. When Is Separate Edge Customization Necessary?   1. Thickness difference exceeds 3 times   For example, if the same equipment is used to cut both 0.3mm and 1.0mm materials, the edge angle and radius requirements are completely different. Two sets of stainless steel strip slitting circular blades should be customized.   2. Completely different material properties   Even with the same thickness, different materials (e.g., copper strip vs. stainless steel strip) have different edge requirements. Circular blades for copper strip cutting require extremely sharp, anti-adhesion edges, while alloy blades for silicon steel slitting require wear-resistant edges.   3. Different equipment rigidity   Old equipment with poor rigidity requires a duller edge to absorb impact; new equipment with sufficient rigidity can use a sharper edge. If two sets of equipment share the same high-precision custom blades, the results will inevitably differ.   3. When Is Customization Not Necessary?   · Thickness difference within ±50% (e.g., 0.8mm and 1.2mm): use a medium edge angle and adjust the gap. · Both are within the thin material range (0.3-0.8mm) or within the thick material range (1.5-3mm): only fine-tuning the gap is needed; no separate edge customization is required.     4. Mingbai Technology's "One Material, One Edge" Customization Solution   Mingbai Mechanical Tool Technology Co., Ltd. provides targeted customization services:   1. Customer provides material grade, thickness range, and equipment model. 2. Mingbai engineers calculate the optimal combination of edge angle, radius, and clearance angle. 3. Produce the corresponding custom slitter blades and attach an edge inspection report.     If the same equipment needs to cut multiple thicknesses, we can provide a "multi-edge blade set for different thicknesses" with laser marking on the blade indicating the recommended thickness to avoid misuse.   5. Case Comparison   A copper strip slitting plant used the same set of wear-resistant circular blades to cut 0.2mm and 0.8mm copper strips. Cutting 0.2mm produced smooth edges, but cutting 0.8mm resulted in severe burrs and halved blade life. Mingbai Technology customized two sets of slitting circular blades with different edges: 18° sharp edge for thin material, 25° wear-resistant edge for thick material. By switching blades when changing materials, burrs disappeared, and total blade life increased by 40%.     Conclusion   When shearing different thickness materials with circular blades, separate edge customization is not always necessary. However, when the thickness difference exceeds 3 times, material properties differ, or equipment rigidity varies significantly, customizing the edge is essential to ensure cutting quality. Mingbai Technology is committed to providing professional "one material, one edge" matching solutions, ensuring you get excellent results whether cutting thin or thick materials.   Website: www.mingbaiblade.com

When purchasing high-precision custom blades, wear-resistant circular blades, or high-speed slitter blades, many users notice a phenomenon: blades of the same specification and same material can have quotes from different manufacturers that differ by three times or even more. Cheap blades seem to offer high cost-performance, but often have short life and many failures. Expensive blades make people wonder if they are paying a "stupidity tax." Mingbai Mechanical Tool Technology Co., Ltd. reveals the truth behind the price differences.   1. Raw Materials: The Same "Cr12MoV" Can Be Very Different   Many manufacturers claim to use Cr12MoV die steel, but even with the same Cr12MoV, the purity and carbide uniformity vary greatly between different steel mills and smelting processes. The first thing to consider is raw materials: low-priced blades may use recycled materials, non-standard materials, or low-purity steel from small mills, with internal defects such as segregation, inclusions, and porosity. High-hardness alloy blades made from such materials may barely meet hardness requirements but have poor toughness and are prone to chipping. In contrast, reputable manufacturers use electroslag remelted steel from major mills such as Baosteel and Fushun Special Steel, with uniform structure and fine carbides. High-quality steel provides significantly longer life and better stability. The difference in raw material cost can be 2-3 times, which is the first layer of price difference.     2. Heat Treatment: The Difference Between Having a "Vacuum Furnace" or Not Is Enormous   Heat treatment is the most "invisible" link in blade manufacturing. Low-priced blades use ordinary box furnaces or salt bath furnaces without atmosphere protection, resulting in severe surface decarburization; quenching temperatures are controlled by experience, leading to poor batch consistency; insufficient tempering cycles leave high residual stress. Vacuum heat treated precision machine blades of this kind may have inconsistent hardness and many internal micro-cracks. Reputable manufacturers use vacuum furnaces or protective atmosphere furnaces with computer-controlled precise temperatures; high-speed steel blades undergo 3-4 tempering cycles to fully relieve stress. The cost difference due to heat treatment quality can reach 30%-50%.     3. Grinding Precision: Micron Level vs. "Close Enough"   The edge angle, concentricity, and flatness of a blade directly determine cutting quality and life. Low-priced blades use ordinary tool grinders controlled by operator feel, with edge angle deviations of ±2° or more, and concentricity may exceed 0.02 mm. When installed, runout is large, vibration is severe, and burrs are serious. In contrast, reputable manufacturers use five-axis CNC grinders, with angle control within ±0.5° and concentricity ≤ 0.005 mm. Each wear-resistant circular blade shipped by Mingbai Technology is precisely inspected. The investment difference in grinding equipment is huge; one CNC grinder costs more than ten times that of an ordinary grinder.     4. Coating: With or Without Coating, and What Kind of Coating, Makes a Huge Difference   High-end blades typically use PVD coatings (TiN, TiAlN, DLC, etc.), which significantly reduce friction and improve wear resistance. Low-priced blades either have no coating or a very thin, non-professional coating that peels off within hours. Reputable manufacturers use imported coating equipment, with uniform coating thickness and strong adhesion. For materials such as stainless steel, corrosion-resistant stainless steel blades with high-quality coatings can greatly extend life. The coating cost difference per blade can be tens to hundreds of RMB, and the gap is significant in batch production.     5. Inspection and Quality Control: Full Inspection vs. Spot Check vs. No Inspection   Low-priced blades often have no inspection reports; hardness, angle, and runout all rely on "feel," and a batch may contain substandard products. Reputable manufacturers subject each blade to multiple tests for hardness, angle, runout, etc., before shipment, with traceable data. Mingbai Technology provides a complete inspection report for each high-speed slitter blade. The investment difference in quality control systems is also reflected in the price.     6. After-Sales Service: Someone to Turn to When Problems Arise vs. No One to Complain To   Higher-priced manufacturers typically provide value-added services such as technical consulting, on-site commissioning, and resharpening and recycling. Low-priced manufacturers often sell on a "one-off" basis, and you cannot find anyone when blade problems occur. Choosing a reliable supplier of high-precision custom blades results in lower long-term operating costs.   Mingbai Technology's Value Proposition   Mingbai Mechanical Tool Technology Co., Ltd. does not compete on the lowest price, but on "total cost of ownership." We firmly believe that one reasonably priced high-precision custom blade with stable life has a far lower total cost than three low-priced blades that fail frequently. We provide electroslag remelted steel from major mills, vacuum furnace heat treatment, CNC five-axis grinding, PVD coating, inspection reports for each blade, and 24/7 technical support.     Conclusion   A threefold price difference for the same model of blade reflects comprehensive gaps in raw materials, heat treatment, grinding, coating, quality control, and service. When selecting blades, do not look only at the unit price; look at the "cost per meter cut" and the "total cost of ownership." Mingbai Technology is committed to transparent processes and solid quality, so that every penny you spend is on the cutting edge. Website: www.mingbaiblade.com