Circular Disk Slitting Knife

• Brief introduction of Circular Disk Slitting Knife

  

  Aug 31, 2026

  A Circular Disk Slitting Knife (often called a rotary slit blade or circular slitter) is a precision cutting tool used primarily in industrial converting, packaging, and manufacturing machinery to slice continuous webs of material into narrower strips.     Key Characteristics: Shape: Designed as a flat, ring-like circular disk with a central bore to mount onto a rotating shaft or driven arbor.   Cutting Action: Operates typically through shear cutting (acting like a pair of scissors against a bottom knife), score cutting (crushing the material against a hardened anvil roll), or razor slitting.   Edge Profile: Available with single-bevel, double-bevel, dish-shaped, or serrated edges depending on the desired cleaness of the cut and the material type.   Common Applications: Paper & Pulp: Slitting large paper rolls into smaller rolls for receipts, newspapers, or packaging.   Plastic & Film: Cutting flexible packaging films, cellophane, and plastic sheeting.   Textiles & Nonwovens: Precision trimming of fabrics, synthetic fibers, and hygiene products.   Metal Foil: Slitting thin aluminum, copper, or other metal foils.   Materials Used: Because these blades run at high speeds and face continuous friction, they are manufactured from durable materials such as:   Tool Steel (e.g., D2, SKD11): Provides a balance of toughness and wear resistance.   High-Speed Steel (HSS): Ideal for higher operating temperatures and extended wear.   Tungsten Carbide: Extremely hard and long-lasting, perfect for abrasive materials and high-volume production runs.

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• Primary Slitting Methods of Circular Disk Slitting Knife

  Apr 08, 2026

  A circular disk slitting knife is a precision-engineered cutting tool used across various industries—from paper and plastic to metal and textiles—to slice large rolls of material into narrower widths.   There are three main ways these knives are used in a production line:   Shear Slitting: This uses two knives—a "male" (top) knife and a "female" (bottom) knife—that act like a pair of scissors. It is the most common method for high-speed, precise cutting of paper and film.   Crush Slitting: A circular knife with a radiused edge is pressed against a hardened rotating cylinder (anvil). The material is essentially pinched until it separates. This is ideal for non-woven fabrics and adhesives.   Razor Slitting: While often using flat blades, circular razor slitting involves thin, sharp disks rotating at high speeds to slice through thin films without the need for a bottom knife.

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