Knowledge Base

Industrial blade performance begins with material selection, which determines durability, sharpness retention, and wear resistance in specific applications. ShengAo utilizes premium materials engineered for exceptional performance in demanding industrial environments.

• High-Speed Steel (HSS): Maintains sharpness at elevated temperatures, making it ideal for high-speed applications. Our M2 and M35 grade HSS blades offer superior heat resistance and edge retention for continuous operation without degradation.
• Tool Steel: Grades including D2, D6, and H13 provide exceptional hardness and wear resistance due to numerous additives in their composition, perfect for heavy-duty cutting in metal recycling and plastic processing.
• Tungsten Carbide: Offers extreme hardness and cutting performance, ideal for abrasive materials. ShengAo's carbide-tipped blades deliver up to 10x longer life than standard steel blades when cutting reinforced materials, composites, and difficult substrates.
• Stainless Steel (420, 440C): Provides excellent corrosion resistance for food processing, chemical environments, and moist applications. These blades maintain hygienic properties while offering good edge retention and easy cleaning capabilities.
• Ceramic Blades: Made from zirconium oxide, they offer exceptional hardness and corrosion resistance. While brittle compared to metal blades, they maintain sharp edges longer and are ideal for precision cutting tasks where contamination must be avoided.
• Special Alloy Steels: Custom-formulated for specific applications, balancing hardness, toughness, and corrosion resistance. ShengAo develops proprietary alloys optimized for unique cutting challenges in specialized industries.

Each material is selected based on specific application requirements for optimal cutting performance and longevity, with hardness levels ranging from HRC 52-92° depending on the material and heat treatment performance .

Industrial blades come in various configurations, each designed for specific cutting methodologies and material types. Understanding these types ensures optimal selection for your application.

• Circular Slitter Blades: Feature sharp cutting edges with low cutting angles for shear cutting paper, film, foil, and non-woven products. These knives work in top/bottom pairs for precise slitting operations in converting machinery.
• Industrial Shredder Blades: Heavy-duty tools designed for size reduction applications. ShengAo's shredder blades feature reinforced geometries and special heat treatment for processing scrap metal, plastics, and recycling materials with exceptional durability.
• Plastic Crusher Knives: Engineered for granulating and pelletizing operations. These blades maintain sharpness when processing various polymer types and can be configured with multiple cutting edges for extended service life.
• Guillotine and Shear Blades: Provide straight-line cutting for metal, paper, and composite materials. Featuring single-bevel designs and robust construction, these blades deliver clean cuts with minimal burr formation.
• Toothed/Serrated Blades: With perforated edges create patterned cuts for specialized applications. These blades are used for materials requiring ventilation, easy tearing, or decorative edges, with patterns ranging from straight lines to wave formations.
• Granulator Knives & Pelletizer Blades: Specialized for plastic processing equipment. ShengAo designs these blades with precise clearance angles and optimal hardness profiles to prevent material wrapping and ensure consistent pellet size.
• Long Machine Knives: Serve industries requiring extended cutting edges for wide web processing. Applications include paper trimming, textile cutting, and broad web material conversion operations.
• Slotted Slitter Razor Blades: Ultra-thin blades (below 0.65mm thickness) designed for precision slitting of flexible materials. These blades minimize material deformation and provide cleaner cuts with reduced dust generation.

Our blades are widely used in metal sheet, rubber, plastics, ceramics, paper industry, food machinery, textile, electrical appliances, aviation, and many other industries .

The bevel configuration significantly impacts cutting performance, edge durability, and application suitability. ShengAo engineers bevel geometries based on scientific cutting principles and material-specific requirements.

• Single Bevel Blades: Feature one ground angle on the cutting edge, typically between 30°-60°. These blades excel in clean slicing applications but may experience quicker tip dulling. They're ideal for pelletizing, granulating, and cross-cutting operations where clean material separation is critical.
• Double Bevel Blades: With two ground angles offer the perfect balance of sharpness and durability. This versatile configuration suits most general industrial applications, providing robust performance with good edge retention. Approximately 90% of industrial knives feature double-bevel designs.
• Triple Bevel Blades: Incorporate three grinding angles for extreme sharpness perfect for challenging materials. These blades excel with stretchy plastic film, silicone, latex, and thin foils where less sharp blades would tear rather than cut cleanly.
• Hollow Ground Blades: Feature a concave profile that reduces cutting resistance. This design is preferred for slitting operations and provides cleaner edge cuts with reduced blade breaks, especially when processing multilayer materials.
• Chisel Edge Blades: Designed for tough scraping and material removal applications. The asymmetric grind provides exceptional durability for demanding operations where edge integrity is more critical than cutting precision.

Bevel angle considerations vary by application: 0-10° for metals and laminates, 30° for paper/foils/cardboard, and 45-60° for specialty film and multilayer paper applications. The more bevels on the knife's cutting edge, the sharper the knife, but it also becomes more fragile and has less wear resistance, requiring a balance for optimal performance .

Choosing the correct industrial blade requires evaluating multiple factors to ensure optimal performance and longevity. ShengAo provides comprehensive technical support to guide this selection process.

1. Material Characteristics: Including hardness, abrasiveness, thickness, and composition determine blade specifications. Hard, abrasive materials require blades with greater hardness and wear resistance, while soft, fibrous materials need sharper, finer edges.
2. Production Volume: Influences material selection and design considerations. High-volume operations benefit from premium materials like tungsten carbide that maintain sharpness longer, despite higher initial cost, due to reduced changeover frequency.
3. Cutting Precision Requirements: Dictate edge geometry and blade rigidity. Applications demanding tight tolerances need precision-ground blades with consistent edge geometry and minimal runout.
4. Machine Specifications: Including shaft sizes, operating speeds, and mounting configurations must be considered. Compatibility ensures optimal performance and prevents premature wear or safety issues.
5. Operating Environment: Factors such as temperature, moisture, and corrosives influence material selection. Stainless steel or coated blades are essential in humid or chemically aggressive environments.
6. Cost-Per-Cut Analysis: Evaluates total operational economics rather than just initial blade cost. ShengAo technicians can help calculate this metric to identify the most economical solution for your specific application.

For double shaft shredder blades specifically, consider matching blades to your application material, ensuring compatibility with your shredder, evaluating blade material and manufacturing quality, selecting the right blade design, and balancing cost-effectiveness with performance and maintenance .

ShengAo's manufacturing methodology combines advanced technology with precision craftsmanship to produce blades of exceptional quality and consistency.

• Computer-Aided Design (CAD): Engineering optimizes blade geometry for specific applications. Our design process simulates performance under various operating conditions to ensure optimal functionality before production begins.
• CNC Machining: Delivers micron-level precision in blade formation. Computer Numerical Control technology ensures each blade matches design specifications exactly, with consistency maintained across production runs with tolerances as tight as ±0.002mm.
• Heat Treatment: Processes including quenching, tempering, and austempering enhance material properties. ShengAo's controlled atmosphere heat treating ensures uniform hardness distribution and optimal microstructures for each blade type, achieving hardness up to HRA 93.5-95.
• Precision Grinding: Creates the critical cutting edges that define blade performance. Our multi-stage grinding process progresses from rough shaping to fine edge finishing, achieving surface finishes as fine as 0.1μm.
• Quality Verification: Involves rigorous inspection of dimensions, hardness, and surface quality. Each blade undergoes multiple checkpoints to ensure compliance with specifications before shipment, including 100% hardness testing and AQL sampling per ASTM standards.
• Balancing Procedures: Ensure vibration-free operation at high speeds. Dynamic balancing is particularly critical for large diameter circular blades operating at rotational speeds exceeding 1000 RPM.

We maintain ISO 9001 standards throughout our manufacturing process to ensure consistent quality across all products .

Surface treatments and coatings significantly enhance blade performance, longevity, and cutting efficiency. ShengAo offers comprehensive coating solutions for challenging applications.

• Titanium Nitride (TiN) Coating: Increases surface hardness and reduces friction. This gold-colored coating provides exceptional wear resistance, especially for cutting abrasive materials, extending blade life up to 300%.
• Ceramic Coatings: Offer superior corrosion resistance and non-stick properties. Ideal for processing adhesive materials or in corrosive environments, these coatings prevent material buildup and simplify cleaning.
• Black Oxide Treatment: Provides mild corrosion resistance and reduces light reflection. This cost-effective treatment offers some protection while maintaining the blade's original dimensions.
• Chromium Nitride (CrN) Coating: Delivers higher temperature resistance than TiN. This silver-colored coating excels in high-speed applications where heat generation would degrade other coatings.
• Polished Surfaces: Reduce friction and material adhesion. Mirror finishes are particularly beneficial when processing sticky materials or when clean material release is critical.
• Anti-Corrosion Treatments: Protect blades in humid or chemically aggressive environments. These treatments are essential for food processing, chemical industries, and marine applications.

Advanced coatings like carbide or titanium nitride improve resistance to wear and heat. Heat-treated blades maintain sharpness and hardness longer, reducing maintenance needs and improving blade life despite higher initial costs .

Proper maintenance significantly extends blade life and maintains cutting quality. ShengAo offers comprehensive maintenance services and guidelines.

• Regular Inspection: Protocols identify wear before it affects product quality. Visual examination for nicks, dull spots, or corrosion should occur daily, with detailed measurements taken weekly.
• Professional Sharpening: Restores original cutting performance. ShengAo's resharpening process removes minimal material while achieving optimal edge geometry, extending total blade life through multiple sharpening cycles.
• Cleaning Procedures: Prevent corrosive buildup and maintain hygienic conditions. Immediate cleaning after use is recommended, especially when processing organic materials or corrosive substances.
• Proper Storage: Conditions prevent damage and corrosion. Blades should be stored individually in protective sheaths in dry, temperature-controlled environments.
• Lubrication Requirements: Vary by application. Some cutting operations require specific lubricants to reduce friction and heat generation, while others must operate dry to avoid product contamination.
• Documentation Tracking: Monitors blade usage and maintenance history. Serial number systems help manage inventory and predict replacement timing, minimizing unplanned downtime.

Additional maintenance tips include employing suitable lubrication techniques to minimize friction and heat, installing cooling systems to dissipate heat generated during cutting operations, ensuring proper blade alignment to prevent uneven wear, and implementing precision grinding to maintain sharpness . Regular monitoring and proactive maintenance are key to extending blade life and ensuring optimal performance.

Identifying and addressing common blade problems quickly minimizes downtime and maintains product quality. ShengAo provides technical support for troubleshooting operational issues.

• Premature Dulling: Often indicates incorrect blade selection for the material or application. Switching to a more wear-resistant material or different edge geometry typically resolves this issue.
• Chipping or Fracturing: Usually results from excessive hardness or improper clearance angles. Softer materials or different heat treatment may be necessary, particularly when processing inconsistent feed materials.
• Material Adhesion: Occurs when processing sticky substances. Non-stick coatings, polished surfaces, or different edge geometries can prevent buildup that compromises cutting quality.
• Excessive Dust Generation: Frequently stems from blade dullness or incorrect angle of attack. Sharpening or adjusting the blade position relative to the material often improves cut quality.
• Uneven Wear Patterns: Suggest misalignment or imbalance issues. Checking machine tolerances and blade mounting alignment typically corrects this problem.
• Corrosion Issues: Require material changes or protective coatings. Stainless steel blades or appropriate surface treatments prevent degradation in challenging environments.

For shredder blades specifically, common issues include jamming or uneven wear due to misaligned or poorly spaced blades. Regular inspection and adjustment based on manufacturer guidelines can prevent these problems .

Different industries present unique cutting challenges that require specialized blade solutions. ShengAo develops application-specific blades optimized for particular sectors and materials.

• Plastic Recycling: Operations demand blades that withstand abrasive reinforced materials and maintain sharpness. Our plastic crusher knives feature wear-resistant edges and anti-adhesion coatings for consistent performance when processing ABS, PE, PP, and other plastics.
• Metal Recycling: Applications require extreme toughness and impact resistance. ShengAo's shredder blades for metal processing incorporate special alloys and heat treatment to handle mixed scrap without chipping.
• Paper Converting: Blades need razor-sharp edges for clean cuts without dust. Our slitter knives for paper applications feature polished surfaces and optimized bevel angles for precision converting of various paper grades.
• Food Processing: Blades must meet hygienic standards while resisting corrosion. Stainless steel constructions with appropriate certifications ensure compliance with food safety requirements.
• Textile Cutting: Applications require sharpness to prevent fraying while maintaining edge longevity. Specialized coatings reduce friction when cutting synthetic fabrics and prevent fiber buildup.
• Packaging Industry: Blades combine precision with high-volume durability. Guillotine knives for packaging feature wear-resistant edges that maintain sharpness through millions of cycles.

Our products are widely used in metal sheet, iron tower factory, rubber, plastics, ceramics, paper industry, carton forestry, food machinery, textile, electrical appliances, aviation, aluminum foil, metallized film, tobacco, cigarettes, packaging materials, and many other industries .

Yes, ShengAo specializes in developing custom blade solutions for unique applications and challenging materials. Our engineering team collaborates with clients to create optimized cutting solutions.

• CAD/CAM Design: Services translate specific requirements into precision blade specifications. We create digital prototypes and simulate performance before manufacturing.
• Reverse Engineering: Reproduces or improves upon existing blades. We can replicate performance characteristics while enhancing durability or cost-effectiveness.
• Material Development: Formulates custom alloys for unique application challenges. Our metallurgists create specialized steel compositions balancing hardness, toughness, and corrosion resistance.
• Prototype Development: Tests new designs before full production. We fabricate limited quantities for customer evaluation and performance verification.
• Application Testing: Validates performance under actual operating conditions. Our testing laboratory can simulate most industrial environments to ensure optimal performance.
• Technical Support: Provides expert guidance throughout the blade lifecycle. ShengAo's technicians offer comprehensive support from selection through maintenance and troubleshooting.

We support non-standard blade customization including size customization (diameters <50mm or >600mm), material upgrades (tungsten carbide grades for abrasive materials), and coating options for high-heat environments. Customers can provide technical drawings for expedited solutions .