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High-precision CBN Insert

For machining applications demanding unparalleled hardness and resilience, look no further than our High-precision CBN Insert. Engineered for extreme performance, this insert is designed to tackle the most challenging materials where other cutting tools fail. Its core advantage lies in a specialized Cubic Boron Nitride composition that provides exceptional wear resistance and thermal stability. This makes it the ideal solution for hardened steels, cast irons, and other ferrous alloys, ensuring superior surface finish and dimensional accuracy over extended production runs. Whether you need the ultimate durability of a High-hardness CBN Insert for abrasive materials, the reliable performance of a High-temperature Resistant CBN Insert in high-heat operations, or the rugged toughness of an Impact-resistant CBN Insert for interrupted cuts, this precision tool delivers. It is specifically optimized as a premier CBN Insert for Ferrous Metals, offering unmatched productivity gains in turning, boring, and milling operations.


The technical superiority of the High-precision CBN Insert is defined by its meticulously controlled parameters. Every aspect, from the substrate bonding to the final edge preparation, is calibrated for maximum consistency and performance. Below are the detailed specifications that set this insert apart in the industry.

Material Composition & Properties

  • Base Material: Premium-grade Polycrystalline Cubic Boron Nitride (PCBN)
  • Substrate: Tungsten Carbide for enhanced strength and support
  • Hardness: 3500 - 4500 HV (Vickers Hardness)
  • Thermal Stability: Stable up to 1400°C (2552°F) without significant degradation
  • Fracture Toughness: High, designed for intermittent cutting conditions
  • Grain Size: Fine, controlled microstructure for sharp, stable edges

Geometry & Tolerances

Parameter Specification Tolerance
Insert Shape Square (SNMN), Triangle (TNMN), Round (RNMN) ISO 1832 Standard
Cutting Edge Length 6.35 mm to 12.70 mm ±0.025 mm
Corner Radius 0.4 mm, 0.8 mm, 1.2 mm ±0.05 mm
Rake Angle 0°, 7°, 11° (Negative) ±0.5°
Clearance Angle 0°, 7°, 11° ±0.5°
Flatness/Parallelism - ≤ 0.005 mm

Recommended Machining Parameters

Workpiece Material Hardness Range (HRC) Cutting Speed (m/min) Feed Rate (mm/rev) Depth of Cut (mm)
Hardened Steel 45 - 65 80 - 250 0.05 - 0.25 0.1 - 0.5
Gray Cast Iron 200 - 300 HB 300 - 600 0.1 - 0.4 0.2 - 2.0
Chilled Cast Iron 50 - 65 HRC 60 - 150 0.05 - 0.20 0.1 - 0.8
Powdered Metals 30 - 55 HRC 100 - 300 0.05 - 0.15 0.1 - 0.4

Coating & Surface Finish

  • Coating Type: TiN, TiAlN, or specialty ceramic-based coatings available.
  • Coating Thickness: 3 - 5 microns (optional).
  • Surface Finish (Cutting Face): Ra ≤ 0.2 µm.
  • Edge Preparation: Honed or chamfered for optimal strength and chip flow.

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