Solid CBN Lathe Cutting Tools, Cubic Boron Nitride Turning Inserts for Hard Turning

Premium super-hard solid CBN lathe cutting tools engineered for wear resistance when turning cast iron, hardened steel, and other difficult materials.

Our CBN inserts leverage the extreme hardness and thermal conductivity of cubic boron nitride for demanding hard turning applications. Each insert features sub-micron edge preparation that preserves cutting sharpness across long production cycles and resists the edge wear that quickly degrades surface finish on conventional carbide tooling.

CBN inserts retain hardness at elevated cutting temperatures, enabling higher spindle speeds and feed rates for shorter cycle times. The flexible setup lets machinists fine-tune parameters for continuous or lightly interrupted cuts, while the low-friction rake face promotes fast chip evacuation and prevents chip packing in deep pockets.

• Extreme hardness and thermal conductivity support high-temperature hard turning without rapid edge breakdown.
• Sub-micron edge preparation maintains cutting sharpness and consistent surface finish over long tool life.
• Higher RPM and feed rate capability shortens cycle time on hardened steel and cast iron components.
• Fewer tooling changes per operation compared with standard carbide turning inserts.
• Flexible coolant compatibility: many inserts run dry, while others work with minimal mist or emulsion coolant.
• Low-friction rake face improves chip evacuation and prevents chip packing in deep pockets.
• Preserves as-machined surface integrity and stable GD&T results across production batches.
• Eliminates secondary grinding and polishing operations in many hard-turning workflows.
• Consolidates multiple jobs onto a single CBN insert platform, simplifying tool magazine management.
• Predictable tool life supports confident production scheduling and lower consumable costs.

CBN inserts are a trusted hard-turning solution for automotive, bearing, and mold steel machining, replacing grinding-intensive workflows with a single, reliable turning platform.

We support tailored CBN insert specifications to match your workpiece material, machine setup, and surface finish requirements. Custom options include insert geometry, edge preparation, and coating selection.

Our manufacturing facility combines advanced grinding, edge preparation, and quality inspection equipment to produce consistent, high-performance CBN turning inserts at scale.