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Home > Metal Sheet Knives > Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
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Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory
Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory

Custom Precision Carbide Slitting Knives For Cooper and Aluminum Foil Manufacturer, Factory

SG’s Carbide Knife offers high-performance tungsten carbide slitting blades for ultra-thin copper & aluminum foils (3.5μm–15μm). Engineered for burr-free cutting, extended lifespan (PVD coated), and ISO 9001-certified quality, our customizable industrial slitting knives ensure flawless cuts for lithium battery foils, composite materials, and precision packaging.
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Product Description

Detailed Description

Our Carbide Knives specialize in high-hardness tungsten carbide slitting blades designed for critical foil-cutting applications. With >3500 MPa (transverse rupture strength) and micron-level edge precision, our aluminum foil slitter blades eliminate dust, burrs, and edge defects—perfect for battery electrode foils (Li-ion/NiMH), flexible packaging, and new composite materials.
🎯 Zero Burr Cutting

Micro-grinding technology ensures clean cuts on 3.5μm copper foil & 15μm aluminum foil.

🛡️ PVD Coating

3–5X longer lifespan vs. uncoated blades. Resists wear, adhesion, and corrosion.

⚙️ Custom Solutions

Modify blade width, edge angle, or coating to suppress wavy edges and tension-related defects.

Carbide Slitting Knife

Features

Ultra-Hard Material: Cemented tungsten carbide with HRC 90+ hardness.
Engineered for Thin Foils: Handles 3.5–5μm copper foil and 15μm aluminum foil.
Anti-Defect Design: Polished edge band reduces micro-cracks & delamination.
High Strength: >3500 MPa prevents chipping under high-speed slitting.
Coating Options: PVD/DLC (TiAlN, CrN, or DLC) for extreme durability.
Slitting Knife Features

Specifications

Items ØD * Ød * T mm
1 Φ50 * Φ20 * 0.3
2 Φ80 * Φ20 * 0.5
3 Φ80 * Φ30 * 0.3
4 Φ80 * Φ30 * 0.5

Applications

Our carbide slitting knives excel in critical cutting tasks for advanced materials. They deliver flawless performance on ultra-thin anode copper foils (3.5-8μm) and cathode aluminum foils (10-15μm) for lithium-ion/NiMH batteries. Battery material suppliers rely on our blades for high-purity rolled foils, ensuring contamination-free edges. Slitting machine manufacturers integrate our custom-width blades for precision foil converting equipment. The knives also produce clean-cut EMI shielding films and flexible PCB substrates without microtears. With PVD-coated edges, they handle composite foils in new energy and electronics packaging — consistently outperforming standard tools in edge quality and longevity.

Questions & Answers

How does the knife improve battery foil yield?
Our micron-level edge control minimizes foil tearing and dust generation, which is critical for high-speed battery production and reducing waste.
Can you match existing blade dimensions for my equipment?
Yes! We can provide fully compatible slitting knives based on your specific width, OD, ID, or edge angle requirements.
What coating is best for cutting composite foils?
DLC (Diamond-Like Carbon) coating is highly recommended for carbon-coated aluminum foils due to its exceptional non-stick properties and wear resistance.
What is the hardness of these carbide knives?
The blades are manufactured from cemented tungsten carbide with a hardness rating of HRC 90+, ensuring they stay sharp significantly longer than steel alternatives.
What is the thinnest foil these blades can handle?
Our knives are engineered for precision on ultra-thin materials, effectively handling 3.5μm copper foils and 15μm aluminum foils without causing edge defects.
How does PVD coating benefit the slitting process?
PVD coating provides a 3–5X longer lifespan compared to uncoated blades by offering superior resistance to wear, adhesion, and corrosion during high-speed operations.

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