CBN Cutting Insert | Schnell Diamant | Germany

CBN (Cubic Boron Nitride) cutting inserts are cutting tools commonly used in machining applications where extreme hardness, wear resistance, and high-temperature stability are required. These inserts are particularly suitable for cutting hard materials like hardened steels, cast irons, and superalloys. Here are some key features and considerations regarding CBN Cutting Insert:

1. Material Composition:

2. CBN cutting inserts are composed of cubic boron nitride, which is a synthetic material known for its exceptional hardness, second only to diamond. CBN is capable of withstanding high temperatures generated during machining.

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4. Applications:

5. CBN cutting inserts are primarily used in applications where traditional cutting tools, such as carbide inserts, would wear out quickly. Common applications include hard turning, high-speed turning, milling, and boring of hardened steel components, cast iron parts, and heat-resistant alloys.

1. Advantages:

   • Exceptional hardness and wear resistance, resulting in extended tool life.
   • High-temperature stability allows for machining at elevated cutting speeds.
   • Improved surface finish and dimensional accuracy due to reduced tool wear.
   • Reduced cutting forces and power consumption in many cases.
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2. Insert Geometry:

   • Turning inserts for external and internal turning.
   • Milling inserts for face milling, end milling, and slotting.
   • Boring inserts for internal hole machining.
   • Grooving and parting-off inserts.

3. CBN cutting inserts come in various geometries to suit different machining operations. These geometries include:

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5. Insert Grades:

6. Different CBN insert grades are available for specific machining applications and workpiece materials. Manufacturers provide grade recommendations to help select the right insert for the job.

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8. Coolant and Lubrication:

9. Effective cooling and lubrication are essential when using CBN cutting inserts, especially when machining at high speeds. Coolant helps dissipate heat and prolongs tool life.

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13. Cutting Parameters:

14. Adjust cutting parameters such as cutting speed (surface speed), feed rate, and depth of cut based on the workpiece material and insert grade. Higher cutting speeds are generally preferred for CBN inserts.

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16. Tool Holders:

17. Use tool holders designed to accommodate CBN inserts. Proper clamping and tool holder rigidity are crucial for achieving accurate and consistent results.

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19. Safety:

20. Follow safety guidelines and wear appropriate personal protective equipment (PPE) when handling CBN cutting inserts, as they can produce fine, abrasive dust during machining.

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22. Tool Maintenance:

23. Regularly inspect CBN inserts for wear and damage. Replace inserts as needed to maintain machining quality and prevent premature tool failure.

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25. Consult Manufacturer Guidelines:

26. Always refer to the manufacturer's guidelines and recommendations for the specific CBN cutting insert you are using. These guidelines provide valuable information on cutting parameters, tool selection, and maintenance.

In conclusion, CBN cutting inserts are indispensable tools for machining hard materials and are known for their durability and performance. Proper selection, setup, and maintenance are essential to maximize the benefits of CBN cutting inserts in your machining operations.

Schnell Germany