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Home Round Blade Bottom Slitter Knife
  • Bottom Slitter Knife
  • Bottom Slitter Knife
  • Bottom Slitter Knife
Non-Standard Round Blade

Bottom Slitter Knife

At Yishi Machinery, we know that the key to a reliable slitting system lies in the bottom slitter knife. Made from materials like 9CrSi, Cr12MoV, and others, our knives combine excellent toughness with high hardness. Designed for precision and durability, they provide consistent cuts, reliable performance, and longer service intervals for your converting line.
  • Sharper
  • High-precision
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Customized sizes are available, according to your drawing or sample.

  • Fully Custom
  • Expedited Production Processing

Large blade double-layer

The large slope of this knife design reduces cutting resistance, ensuring smoother cuts. The result is a flat incision with no burrs, making it ideal for precise, high‑speed slitting.

Small double blade

This knife is widely used for cutting harder or thicker materials, such as adhesives, paper, leather, and more. Its design ensures clean cuts with a sharp edge, making it perfect for tougher applications.

Why Choose Our Bottom Slitter Knife?

Industry Applications

  • Applications
    Paper & Tissue converting lines
  • Applications
    Film & Foil slitting
  • Applications
    Non‑wovens & Textiles
  • Applications
    Plastics & Rubber sheet slitting
  • Applications
    Metal or composite foil slitting

How to Select the Right Bottom Slitter Blade

When choosing a bottom slitter knife, consider these key factors:

  • Material to be cut: different web materials (paper, film, foil) require different hardness and edge design.
  • Slitting method: shear, crush, razor – the bottom knife must match the method.
  • Top knife compatibility: the bottom knife must match the top knife in radius, bevel and material pairing.
  • Hardness and geometry: higher hardness may extend life, but must be balanced with machine tolerance.
  • Run‑out and concentricity: excessive radial or axial run‑out leads to poor cut quality and faster wear.
  • Downtime cost: choose a knife that gives longer life or easier re‑grinding to reduce total cost of ownership.

Technical Parameters

Cutter blade
Characteristic
High precision, sharp and wear-resistant cutting edge, flat cutting surface
Texture of material
9crsi,skd-11/D2,cr12mov,W6Mo5Cr4v2,W18cr4v etc.
Suitable for Industry
Blades are widely used in papermaking, paper products processing, adhesive tape products, film, wire and cable, rubber, aluminum foil, non manufacturing cloth, composite packaging materials, chemical fiber, telecommunication appliances, cigarette, leather, printing, food and clothing industries.

Why Yishi Machinery for Your Bottom Slitter Blade?

  • Full‑service factory: From raw material selection to heat‑treating, grinding, inspection and packaging, we control the entire process.
  • Custom sizes & OEM compatibility: Whether you need a direct replacement for a legacy machine or a custom blade for a new line, we can deliver.
  • Global logistics & support: We ship worldwide and provide after‑sales support, re‑grinding service and spare supply.
  • Quality assurance: All knives undergo material testing, edge finish inspection and run‑out measurement to satisfy demanding converting lines.
  • Cost‑effective solutions: Longer service life, fewer change‑overs, less downtime – we help lower your total cost of ownership.

Installation & Maintenance Tips

  • Ensure correct alignment of top and bottom knives; misalignment causes premature wear or edge chipping.
  • Periodically check knife run‑out and surface finish; replace or re‑grind when out of tolerance.
  • Keep blade groove channels clean from dust and debris to maintain consistent nip and avoid web bounce.
  • Use the bottom knife as part of a matched set with the top knife to ensure optimal slit quality and minimal dust.
  • Track service life and set proactive re‑grind or replacement intervals to avoid unplanned downtime.

Frequently Asked Questions

Do you have any questions about our products and how to use them? We have compiled the most frequently asked questions and answered them. If your question is not listed here, please contact us.

More About Us
  • What are bottom slitter knives made of?

    Bottom slitter knives are typically made from high-quality tool steels or carbide materials for durability and wear resistance, ensuring optimal performance in slitting applications.

  • How can I tell if my bottom cutting knife needs replacing or sharpening?

    If you notice reduced cutting efficiency, increased dust, or visible damage such as chips or cracks, it's time to replace or re-sharpen the knife.

  • How can I extend the lifespan of my bottom slitter blade?

    Ensure proper alignment with the top knife, keep the blade grooves clean, and regularly inspect for wear. Timely re-sharpening or replacement will also help maximize its lifespan.