What is Diamond and CBN? A Complete Guide to Superabrasive Grinding Wheels

Introduction

In modern manufacturing, precision grinding plays a critical role in producing high-quality components. Among the most advanced abrasive materials used today are Diamond and CBN (Cubic Boron Nitride). These materials are known as superabrasives because they offer significantly higher hardness, durability, and grinding efficiency compared to conventional abrasives.

At Eurogrind Superabrasives, we manufacture a wide range of Diamond and CBN grinding wheels designed for industries such as cutting tools, automotive, aerospace, gear manufacturing, power generation, and precision engineering.

What is Diamond Abrasive?

Diamond is the hardest known material and is widely used for grinding extremely hard and brittle materials.

Diamond Grinding Wheels are commonly used for:

• Tungsten Carbide

• Ceramics

• Glass

• Quartz

• Graphite

• Composite Materials

• PCD Tools

• Thermal Spray Coatings

Diamond wheels provide:

• Exceptional hardness

• High wear resistance

• Superior surface finish

• Excellent dimensional accuracy

• Long wheel life

What is CBN (Cubic Boron Nitride)?

CBN is the second hardest material after diamond and is specifically designed for grinding ferrous materials.

CBN Grinding Wheels are ideal for:

• HSS (High Speed Steel)

• Tool Steel

• Bearing Steel

• Hardened Steel

• Alloy Steel

• Powder Metallurgy Components

Benefits of CBN Wheels:

• Higher productivity

• Reduced grinding heat

• Better profile retention

• Longer dressing intervals

• Improved tool life

Diamond vs CBN: Which One Should You Use?

Property	Diamond	CBN
Hardness	Highest	Second Highest
Best For	Carbide & Ceramics	Steel & HSS
Wear Resistance	Excellent	Excellent
Thermal Stability	Good	Superior for Steel
Typical Applications	Carbide Tools, Ceramics	HSS Cutters, Gears, Bearings

General Rule:

• For Carbide Materials → Diamond Wheel

• For Steel Materials → CBN Wheel

Why Are Diamond and CBN Called Superabrasives?

Diamond and CBN are classified as Superabrasive Grinding Wheels because they outperform conventional abrasives such as aluminum oxide and silicon carbide in terms of hardness, wheel life, grinding efficiency, and surface finish.

These wheels enable:

• Faster material removal

• Lower grinding temperatures

• Better dimensional control

• Reduced production costs

• Consistent grinding performance

Types of Diamond and CBN Grinding Wheels

Eurogrind Superabrasives manufactures:

• Resin Bond Diamond Wheels

• Resin Bond CBN Wheels

• Hybrid Bond Wheels

• Vitrified Bond Wheels

• Metal Bond Wheels

• Electroplated Diamond Wheels

• Electroplated CBN Wheels

• Diamond Honing Stones

• Diamond Dressers

• PCD & PCBN Tools

Applications of Diamond and CBN Wheels

Industries using superabrasive grinding technology include:

• Cutting Tool Manufacturing

• Automotive Industry

• Aerospace Industry

• Gear Manufacturing

• Bearing Industry

• Power Generation

• Medical Components

• Precision Engineering

Conclusion

Diamond and CBN grinding wheels have revolutionized precision grinding by delivering exceptional accuracy, longer wheel life, and higher productivity. Selecting the correct superabrasive depends on the workpiece material—Diamond for carbide and non-ferrous materials, and CBN for hardened steels and ferrous alloys.

With over four decades of experience, Eurogrind Superabrasives provides customized Diamond and CBN grinding solutions for demanding industrial applications