Ondulam slitting knives are manufactured from cemented carbide (Tungsten Carbide, chemical abbreviation: WC). Apart from diamond, cemented carbide is the hardest available material on earth.
Cemented carbide material offers an amazing hardness, stiffnes and wear resistance and is therefore very well suited for the production of extremely thin circular knives (rasor blades) for the slitter-scorers of corrugated board machines. The re-sharpening interval for carbide knives is approximately 10 times longer than steel knives.
Ondulam offers circular knives and matching grinding wheels for the most common corrugated board machines.