PCD Inserts vs CBN Inserts vs Cermet Inserts: Benefits, Uses and Applications in CNC Machining
Author : Metaldur Metaldur | Published On : 19 Oct 2026
Choosing the right cutting tool is essential for improving machining productivity, surface finish, tool life, and production costs. PCD Inserts, CBN Inserts, and Cermet Inserts are used for different machining requirements. Understanding their benefits and applications helps CNC machine shops, manufacturers, dealers, and industrial buyers select the right CNC cutting tools for their operations.
1. PCD Inserts for High-Speed Precision Machining
PCD Inserts (Polycrystalline Diamond Inserts) are widely used for machining aluminium, copper, brass, graphite, composites, and other non-ferrous materials. Their diamond-based cutting edges provide excellent wear resistance and long tool life in suitable applications.
Key Benefits of PCD Inserts:
- Excellent surface finish for precision components.
- High wear resistance during continuous machining.
- Longer tool life and reduced insert replacement.
- High-speed machining for improved productivity.
- Better dimensional accuracy in production operations.
PCD Inserts uses include CNC turning, facing, boring, milling, and finishing. These inserts are suitable for automotive components, aerospace parts, aluminium machining, and composite manufacturing.
ExplorePCD Inserts from Metaldur for different insert shapes and machining requirements.
2. CBN Inserts for Hardened Steel and Cast Iron
CBN Inserts (Cubic Boron Nitride Inserts) are designed for demanding machining operations involving hardened steel, bearing steel, cast iron, and other hard ferrous materials. Their high hardness, wear resistance, and thermal stability make them suitable for hard turning inserts and precision finishing.
Key Benefits of CBN Inserts:
- Excellent performance in hard-turning applications.
- High resistance to wear and elevated cutting temperatures.
- Consistent dimensional accuracy.
- Good surface finish under suitable cutting conditions.
- Longer tool life and reduced production downtime.
CBN Inserts uses include machining hardened shafts, bearing components, rollers, gears, and cast iron parts. In suitable applications, CBN Inserts for hardened steel can reduce the need for separate grinding operations, helping save production time and costs.
ExploreCBN Inserts from Metaldur for CNC machining and hard-turning requirements.
3. Cermet Inserts for Finishing and Semi-Finishing
Cermet Inserts combine ceramic materials with metallic binders to provide wear resistance, low friction, and excellent surface finish. They are particularly suitable for finishing and semi-finishing steel components where dimensional accuracy and consistent machining quality are important.
Key Benefits of Cermet Inserts:
- Excellent surface finish on suitable steel materials.
- High wear resistance for consistent production.
- Reduced material adhesion and built-up edge.
- Improved dimensional accuracy.
- Reliable performance in high-speed finishing operations.
Cermet Inserts uses external turning, internal turning, facing, profiling, and precision finishing. They are suitable for CNC machine shops, automotive manufacturing, general engineering, and precision component production. Choosing the correct Cermet Turning Inserts grade and geometry helps achieve reliable machining results.
PCD vs CBN vs Cermet Inserts: Which One Should You Choose?
The main difference between these cutting inserts is their intended workpiece material and machining application.
- PCD Inserts: Best suited for aluminium, copper, brass, composites, and other non-ferrous materials.
- CBN Inserts: Best suited for hardened steel, cast iron, and other suitable hard ferrous materials.
- Cermet Inserts: Best suited for finishing and semi-finishing steel components requiring a good surface finish and dimensional accuracy.
Selecting the right CNC turning inserts depends on material hardness, machining operation, cutting speed, feed rate, machine stability, and required surface finish.
Why Choose Metaldur for CNC Cutting Tools?
Metaldur supplies CNC cutting tools for CNC machine shops, engineering industries, manufacturers, dealers, distributors, and industrial buyers across India. With competitive cutting tool prices, bulk supply options, product selection support, and PAN-India delivery, Metaldur helps businesses source tools according to their machining requirements.
Whether you need PCD Inserts for non-ferrous machining, CBN Inserts for hard turning, or Cermet Inserts for precision finishing, selecting the right cutting tool can improve machining efficiency and help control production costs.
Conclusion: PCD, CBN, and Cermet Inserts each offer specific advantages. Matching the insert to the workpiece material and machining operation is essential for reliable cutting performance, consistent quality, and cost-effective production. Contact Metaldur to discuss your CNC cutting tool requirements and find suitable insert options for your business.
