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Precision CNGA CBN Insert for Hard Turning Applications

HyperCBN's CNGA CBN insert range is engineered from ultra-hard Cubic Boron Nitride for manufacturers who can't compromise on tool life, surface finish, or cutting speed. Explore CNGA inserts and CNGA PCBN inserts built for hardened steel, cast iron, and superalloy machining.

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80°
Diamond Insert Angle
2nd
Hardest Material After Diamond
400+
m/min Cutting Speed*
What Are CNGA Inserts

Cubic Boron Nitride Inserts Built for Uncompromising Hard Turning

A CNGA CBN insert is an 80° diamond-shaped, negative-rake turning insert manufactured with a Cubic Boron Nitride (CBN) cutting edge — the second hardest engineered material after diamond. Our CNGA PCBN insert range is designed to machine hardened steels (45–65 HRC), chilled cast iron, and high-temperature superalloys with a consistency that conventional carbide inserts cannot match.

As Hard turning inserts, CNGA CBN inserts let manufacturers replace slow, expensive grinding operations with a single-pass turning process — cutting cycle time, tooling cost, and coolant use, while holding tight dimensional tolerances and a superior surface finish.

CNGA CBN Insert CNGA Inserts CNGA PCBN Insert Cubic Boron Nitride Inserts Hard Turning Inserts
CNGA — 80° Diamond Insert Geometry
Why CNGA CBN Insert

Engineered Advantages of Our CNGA PCBN Insert Range

Every CNGA CBN Insert leaving our facility is tested for hardness consistency, edge integrity, and thermal stability by HyperCBN before it reaches your machine shop.

Ultra-Hard Cutting Edge

CBN tip hardness enables reliable machining of 45–65 HRC hardened steel without micro-chipping.

Extended Tool Life

Superior wear resistance means more parts per edge and fewer tool changes on long production runs.

High-Speed Capable

Stable thermal performance supports higher cutting speeds compared to standard carbide inserts.

Grinding Replacement

Achieve grinding-grade surface finish through hard turning, eliminating a full production step.

Technical Data

CNGA CBN Insert Specifications

A quick reference for selecting the right CNGA insert grade and geometry for your application. Full technical datasheets are available on request.

  • Insert Shape: 80° Diamond (CNGA / CNMA compatible)
  • Substrate: Solid PCBN tip brazed on tungsten carbide body
  • Common Sizes: CNGA120404 / 120408 / 120412
  • Coolant: Suitable for dry or wet hard turning
ParameterTypical Range
Insert SeriesCNGA CBN / CNGA PCBN Insert
Rake AngleNegative (0°)
Workpiece Hardness45 – 65 HRC
Recommended Cutting Speed100 – 400 m/min
Materials MachinedHardened steel, chilled cast iron, superalloys
ApplicationsHard turning, finishing, semi-finishing
Edge PreparationHoned / chamfered for interrupted cuts
Where It's Used

Industries That Rely on CNGA Inserts

From automotive drivetrains to aerospace landing gear, our CNGA CBN insert and hard turning inserts are trusted across hard-material machining industries.

Automotive

Camshafts, gear hubs, brake disks & drums.

Aerospace

Landing gear & turbine shaft components.

Energy

Bearing races & valve components.

Die / Mold

Hardened tool steel molds.

Mining

Wear parts & slurry pump components.

Why HyperCBN

Your Source for Reliable CNGA PCBN Insert Supply

  • 01

    Consistent Grade Quality

    Every batch of CBN inserts is tested for hardness uniformity before dispatch.

  • 02

    Application Engineering Support

    Our team helps you match insert grade and geometry to your exact material and cutting parameters.

  • 03

    Global Fulfilment

    Trusted by manufacturers across automotive, aerospace, and heavy industry worldwide.

Need Help Selecting the Right CNGA Insert?

Share your material hardness, part geometry, and cutting conditions — our engineers will recommend the right CNGA CBN insert grade for your job.

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Asked Questions

Frequently Asked Questions About CNGA CBN Inserts

What is a CNGA CBN insert used for?+
A CNGA CBN insert is used for hard turning — machining hardened steel, chilled cast iron, and superalloys directly on a lathe, often replacing a separate grinding operation.
What's the difference between a CNGA insert and a CNGA PCBN insert?+
CNGA describes the insert's shape and geometry (an 80° diamond, negative-rake insert). PCBN refers to the Polycrystalline Cubic Boron Nitride tip brazed onto that insert body — so a "CNGA PCBN insert" is a CNGA-shaped insert with a PCBN cutting edge.
Can CNGA CBN inserts replace grinding?+
Yes. CBN inserts enable hard turning, which can achieve grinding-grade tolerances and surface finish in a single turning pass, eliminating a separate grinding step for many hardened components.
What hardness range can CNGA CBN inserts machine?+
Our CNGA CBN insert range is designed for workpiece hardness between 45 and 65 HRC, covering most hardened steel and chilled cast iron applications.
What is the recommended cutting speed for CNGA PCBN inserts?+
Cutting speed depends on the workpiece material and insert grade, but CNGA PCBN inserts typically run between 100 and 400 m/min for hard turning applications.
Which industries use CNGA inserts?+
CNGA inserts are widely used in automotive, aerospace, die and mold, energy, and mining industries for machining hardened, wear-critical components.