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Mozart Blade Print E-mail

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Mozart, fibre blades for cutting staple fibres made from various materials (glass, carbon, basalt, Aramid, PE, PP, PET fibres) feature high standards of reliability and excellent durability. Mozart blades are made of high-quality, special-alloy strip steel. Close tolerances and perfectly ground finishes guarantee the required cutting quality.

Historical facts

  • 1923 Stahlwarenfabrik Steinbrück & Drucks is founded in Solingen, the home of the blade-making industry
  • in the 1950s, production of specialist blades for the trades and DIY work is added to supplement razor blade manufacture
  • In the 1960s, the manufacturing programme is expanded to include special-purpose cutters and blades for industry
  • In the 1970s, the company begins to focus on machine knives for European industry (food processing, packaging, plastics, textiles, fibres)
  • In the 1980s, the company focussed more heavily on manufacturing blades for technical purposes for the trades and industry with all manner of grinding methods and designs
  • 1987 - the company moves to new premises with 11,000 sq m of factory space
  • 1995 - quality certification to DIN ISO 9001
  • 2000 - the company is converted to an AG (company limited by shares); Introduction of profit sharing for employees
  • Family-run firm now in its fourth generation, currently with 110 employees and annual sales of approx. € 12 m


Production Process


Strip steel

  • Strip steel as a raw material
  • Incoming goods controls: surface, edge quality, straightness, metallurgy


  • Blanking the outline, punching rated breakpoints and the text markings
  • Order-specific initial sample release (geometry, finish) and coil-specific material sample


  • Process: Hardening – Quenching – Deep freezing – Tempering – Quenching
  • Continuous process monitoring of hardness and warping
  • Repeated inspections of molecular structure in metallurgy laboratory
  • If necessary, additional surface treatments after hardening (lacquer, etching, polishing)


  1. Strip grinding: straight grind along the upper edge, separated after grinding
  2. Hook grinding: plunge grinding for concave and convex shapes, Separated after grinding
  3. Serrated grinding: plunge grinding with automatic profile cutting, Separated after grinding
  4. 3- Hole grinding: Grinding of the upper and lower edges of the blades on conveyor belts

Snap-off / separating

  • The right notching of the rated breakpoint is decisive for the snap-off process
  • Separation is normally done after grinding

Molecular structure and cutting analysis

  • Continuous quality inspections at all production stages to prevent cumulative defects
  • Analyses of the molecular structure and cutting behaviour guarantee our high quality demands


Multistage packaging with guaranteed preservation