CB bearings knives, also known as CBN cubic boron nitride bearings-specific tools, are ultra-hard precision cutting tools. With hardness second only to diamond, these tools exhibit excellent heat resistance, wear resistance, and anti-sticking properties, along with outstanding thermal stability. They can withstand high-speed dry hard turning and have a significantly longer service life compared to conventional coated tungsten carbide tools. The tools deliver high dimensional accuracy and stability in machining. Their applications are highly specialized, primarily used for precision finishing of high-hardness quenched steel, and are widely employed in mass production scenarios such as bearing factories, automotive components, and precision mechanical parts processing, adapting to automated, high-efficiency mass production modes.

    CB bearings are specialized and professional tools designed for precision turning and milling of hard materials such as HRC 58–65 quenched bearing steel, quenched die steel, and chilled cast iron. They are commonly used for machining bearing inner and outer rings, raceways, arc grooves, oil seal grooves, and precision curved surfaces, enabling substitution for traditional grinding processes. The machined workpieces exhibit high surface finish and dimensional consistency, effectively improving processing efficiency and reducing production costs, making them core tools for mass production of high-hardness precision parts.