Rotary Shear Slitter Knives

• 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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