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Precision Slitting Knives and Spacers Factory Leading China Suppliers

Premium slitting knives and spacers from a professional China factory. Our high-precision tools feature 40Cr and alloy steel with hardness quenching, polyurethane coatings, and rubber ring options. Trust leading China suppliers for burr-free metal slitting.

Product Details

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Product Details

Our precision-engineered Slitting Knives and Slitting Spacers are the critical core components for high-performance slitting lines, designed to longitudinally slice wide steel coils into precise narrower strips. Engineered for versatility, these tools are optimized for a diverse range of industrial materials, including stainless steel, carbon steel, galvanized steel, silicon steel, and aluminum, ensuring a clean, burr-free edge every time.

By combining premium alloy tool steels with advanced heat treatment processes, we provide cutting solutions that offer exceptional hardness and fracture toughness. Whether you require high-precision spacers for gap adjustment or durable knives for heavy-duty industrial cutting, our products ensure maximum operational stability and extended tool life for your metal processing facility.

Detailed Parameters

Knife Materials	D2, SKD11, H13, Cr12MoV, ASP2053	Spacer Materials	65Mn, Cr12, Stainless Steel
Knife Hardness	HRC 58–65	Spacer Hardness	HRC 50–60
Outer Diameter	Ø80 – Ø500 mm	Bore Tolerance	H7 (Customizable)
Knife Thickness	0.8 – 30 mm (Customizable)	Spacer Thickness	0.5 – 20 mm (Customizable)
Flatness/Concentricity	≤0.002 mm / ≤0.01 mm	Surface Finishing	Chrome-plated, Nitrided, Polished

Key Advantages

Premium Wear Resistance

Utilizing powder metallurgy and high-speed steel for HRC 58-65 hardness, ensuring a significantly longer service life.

Extreme Precision

Spacers with tolerances up to ±0.001 mm ensure absolute consistency in knife gap adjustment and positioning.

Clean Cut Quality

Ultra-sharp edges and precise heat treatment minimize burrs and ensure smooth edges on all metal strips.

Material Versatility

Fully compatible with carbon steel, stainless steel, aluminum, and silicon steel for multi-purpose applications.

Optimized Finishing

Available in black oxide, chrome, or nickel plating to prevent corrosion and reduce friction during operation.

CNC Precision Milled

All toolings are processed via CNC lathes to guarantee perfect concentricity and fitment on the shaft.

Product Gallery

Management Platforms

Tooling Storage

Dedicated racks and boxes to keep knives separated, preventing chipping and edge damage.

Regrinding Schedule

Systematic maintenance every 8–12 cutting hours to ensure consistent sharpness and quality.

Dimensional Calibration

Regular verification of spacer thickness when adjusting for different material gauges.

Surface Protection

Application of anti-rust oil and strict cleaning protocols to prevent debris buildup.

Component Labeling

Clear marking and separate storage of spacers by thickness to prevent setup errors.

Thermal Control

Monitoring cutting pressure and speed to avoid overheating and material annealing.

Investment Return Comparison

Comparison Item	Standard Tooling	Our Premium Tooling
Tool Lifespan	Short (Frequent replacement)	Extended (High-grade alloys)
Cutting Precision	±0.05 mm deviation	±0.001 mm precision
Edge Quality	Prone to burrs	Clean, smooth cut
Maintenance Cost	High due to wear	Low due to durability
Production Uptime	Frequent downtime for setup	High stability and efficiency

Frequently Asked Questions

Q: What materials are best for high-speed slitting of stainless steel?

For stainless steel, we recommend powder metallurgy high-speed steel (such as ASP2053) or D2 tool steel due to their superior hardness (HRC 58-65) and resistance to abrasive wear.

Q: How often should slitting knives be reground?

Typically, knives should be reground every 8 to 12 hours of active cutting. However, this interval depends on the hardness of the material being processed.

Q: What is the difference between a rubber-coated spacer and a standard shim?

Rubber-coated spacers provide cushioning and prevent direct metal-to-metal contact to protect the coil surface, whereas shims are used for ultra-fine dimensional compensation.

Q: Can you customize the bore tolerance for specific shaft sizes?

Yes, we offer customizable bore tolerances (standard H7) to ensure a perfect fit with your specific machine shafts and equipment.

Q: How do I prevent rust on my slitting spacers?

We recommend applying high-quality anti-rust oil regularly and utilizing our nickel-plated or chrome-plated options for enhanced corrosion resistance.

Q: What causes premature wear in slitting knives?

Common causes include excessive cutting pressure, overheating due to high speeds, and the accumulation of metal debris on the blade edge.

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