Bottom Knives

Double Edge Bottom Knives feature cutting edges on both sides and are designed for slitting machines, rewinders, and label inspection systems. They provide stable and precise cutting performance for plastic films, metal foils, flexible laminates, rubber, paper, paperboard, nonwovens, labels, textiles, adhesive tapes, and other web materials.
Installed on the bottom knife shaft, these knives work with upper dished knives, flat knives, and knife holders to form a complete shear slitting system. WINGCHONG KNIFE can also manufacture matching upper and bottom knife components to support accurate component compatibility.
The knives are manufactured with a through-hardening heat treatment process, providing uniform hardness throughout the knife body. This improves wear resistance, dimensional stability, and service life for continuous and high-precision slitting applications.

Free Locking Bottom Knives feature a plain bore design without an internal locking mechanism, allowing them to be mounted directly on filled shafts or expanding shafts. With an expanding shaft, the knife is securely positioned by the shaft's expansion mechanism without additional locking components.
These bottom knives are designed for slitting machines, label inspection systems, and rewinders and are suitable for precision slitting of plastic films, metal foils, adhesive tapes, labels, paper, paperboard, textiles, rubber, laminates, and nonwoven materials.
Installed on the bottom knife shaft, Free Locking Bottom Knives work with upper dished knives, knife holders, and pneumatic knife holders to form a complete shear slitting system. WINGCHONG KNIFE can also manufacture matching knife components for accurate system compatibility.
The knives undergo through-hardening heat treatment to provide uniform hardness, improving wear resistance, dimensional stability, and service life for continuous slitting applications.

Multi Bottom Knives integrate multiple cutting knives into a single knife body for continuous, multi-lane slitting. Available in single-edge or double-edge configurations, they can be supplied with different locking systems to suit various machine designs.
Standard knife spacing of 5 mm or 10 mm allows precise and consistent slit widths while simplifying installation. Compared with individual bottom knives, the integrated design provides a compact structure, faster installation, consistent knife spacing, and reduced overall cost.
Multi Bottom Knives are designed for slitting machines, rewinders, and converting equipment and are suitable for paper, paperboard, nonwoven materials, flexible composites, labels, plastic films, adhesive tapes, thin paper, textiles, and other web materials.
Installed on the bottom knife shaft, the knives work with upper dished knives, flat knives, knife holders, or pneumatic knife holders to form a complete shear slitting system. WINGCHONG KNIFE can also manufacture matching upper knife and holder components for precise system compatibility.

Screw Locking Bottom Knives are designed with single-edge or double-edge configurations for different shear slitting applications. Single-edge knives have one cutting edge, while double-edge knives provide cutting edges on both sides for extended usability.
Unlike plain-bore bottom knives, these knives feature a locking screw with a brass insert that securely fixes the knife on the shaft. The locking mechanism can be easily loosened and tightened with a hex key, allowing quick knife positioning and adjustment.
This design is particularly suitable for applications requiring frequent slit-width adjustments. The knife position can be changed directly on the shaft without adding or removing spacers, improving setup efficiency and production flexibility.
Screw Locking Bottom Knives are used in labeling equipment, slitting machines, rewinders, and converting equipment for processing nonwovens, plastic films, metal films, paper, paperboard, laminates, labels, adhesive tapes, tissue, textiles, rubber, and other web materials.
Installed on the bottom knife shaft, these knives work with upper dished knives and knife holders to form a reliable shear slitting system. WINGCHONG KNIFE can also manufacture matching knife components for precise system compatibility.

Self Locking Bottom Knives are designed for efficient knife positioning and quick slit-width adjustment in shear slitting systems. A hardened eccentric locking ring secures the knife to the shaft and allows convenient locking, unlocking, and repositioning.
The eccentric locking ring can be rotated to securely position the knife on the shaft. Correct locking direction during installation helps enable quick unlocking and subsequent adjustment, making these knives suitable for applications requiring frequent slit-width changes.
Self Locking Bottom Knives are suitable for precision slitting of plastic films, metal films, adhesive tapes, labels, tissue, textiles, paper, paperboard, rubber, laminates, and nonwoven materials.
Installed on the bottom knife shaft, these knives work with upper dished knives, pneumatic knife holders, and knife holders to form a reliable shear slitting system. WINGCHONG KNIFE can also manufacture matching knife components for precise system compatibility.