Blades & Cutters

Shear Slitters

Shear slitter knives are precision circular blades used in industrial slitting machines for cutting a wide range of web materials, from thin plastic films to thick metal sheets. Their specifications are critical for achieving high-quality, burr-free cuts at high speeds. Key Specifications Specification Feature Details Material High-carbon steel (D2, D3), High-speed steel (HSS-M2), Powder metal (ASP), or Tungsten Carbide (TC) inlay. Hardness (HRC/HRA) Typically 58-68 HRC for steel blades; Tungsten Carbide inlay is significantly harder at 87-90 HRA. Dimensions Outer Diameter (OD) commonly ranges from 18 mm to over 900 mm; Inner Diameter (ID) and Thickness vary according to machine requirements and material being cut. Tolerances Extra precision tolerances are available for critical applications, including thickness tolerances up to ±0.002 mm and flatness/parallelism of ‰0.002 mm. Geometry Circular (dished or flat-top designs); low cutting angles (e.g., 30 standard cutting angle) and no teeth are typical for shear slitting. Finish Mirror-polished finishes (Ra ‰0.4 µm) are used to minimize friction, reduce material adhesion, and improve cut quality. Blade Clearance The precise gap between the top and bottom knives is crucial and is typically recommended to be about 7% of the material thickness being sheared.

Granulator Blades

Granulator blades are industrial cutting tools used to reduce materials like plastics, rubber, and cables into smaller, uniform pieces for recycling and reprocessing. Their specifications are primarily defined by their material composition, dimensions, and the required precision for the application. Key Specifications Specification Feature Details Sources Material D2 tool steel (1.2379, HCHCR), H13, 440C Stainless Steel, HSS (High-Speed Steel, e.g., M2), Tungsten Carbide (TC) Inlay, Powder Metal (ASP Inlay), 9CrSi, SKD-11 Hardness (HRC/HRA) Typically between 50 and 63 HRC for steel blades; Tungsten Carbide is significantly harder at 87-90 HRA. Dimensions Highly variable and customized to OEM machine specifications (e.g., specific models from Erema, Herbold, etc.). Lengths range from a few inches up to several feet. Thicknesses typically range from 10-50 mm. Tolerances Manufactured to exacting standards to ensure precision cutting, typically with a tolerance of 0.02 mm (or 10 microns for critical bearing surfaces). Geometry Straight blades for general purpose and high throughput; Hooked/Curved for tougher, fibrous materials like film or fiber; Toothed for fine grinding and consistent chip size. Finish A mirror-polished finish is common to reduce friction, minimize material adhesion, and improve cut quality.

Duplex Sheet Cutter Knives

Shear Blade

Bottom Circular Knives