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Turning inserts and grades for hardened steel

Turning hardened steel calls for super-hard insert grades. Whatever your component or requirements for surface finish, you will find productive insert grades here that can withstand high temperatures and cutting forces and still retain their cutting edges.

CB7025

​This CBN grade is your first choice for hardened materials. With its medium content of boron nitride, it's suitable for medium to light interrupted cuts as well as continuous cuts at medium speeds in case-hardened steel​​.

Benefits and f​eatures​

  • Medium to light interruptions
  • Continuous cuts
  • Medium speeds

 

Hard Part Turning with CBN Inserts

Grade selection and patented geometry technology provides you with the most cost-efficient surfaces when hard part turning.

Achieve good surface finish in HPT

Hard part turning has been proven to reduce machining time and costs by 70% or more.

Find your solution for hard part turning

Whatever your component design or surface finish requirements, you will achieve high productivity and outstanding quality with our HPT solutions.

Turn to hard part turning

Switching from grinding to hard part turning substantially increases productivity. Find out more about the super-hard insert grades optimized for hard part turning.

What’s new?

CB7105 and CB7115

The new grades CB7105 and CB7115 break new ground in hard part turning. The grades achieve efficient and secure machining with excellent surface finish. The grades' speed capabilities, more secure edge line, and consistent tool life result in lower cost per component.

Benefits

  • Lower cost per part through high speed machining or longer tool life at lower speed (CB7105)
  • Lower cost per part when aiming for one cut strategy at high speed (CB7115)
  • Reliable and predictable machining

Find your grade

​Our hardened material insert grade assortment consists of CVD- and PVD-coated carbide and ceramic grades for various machining conditions. Use the information below to find the right grade for your production.

Application area
Machining conditions: GoodAverageDifficult
​​

CB7025

​First-choice CBN grade for medium to light interruptions and continuous cuts at medium speeds in case-hardened steel.

CoroTurn® 1​07: First choice for external and internal machining of small and slender components.

CoroTurn® TR: Extremely stable system that avoids micro-vibrations.

T-Max® P: First choice for general turning from small components to heavy machining.

See complete assortm​ent

CB7015

​CBN grade with low CBN content. Use in continuous cuts at high speed in case-hardened steel.

CoroTurn® 107: First choice for external and internal machining of small and slender components.

CoroTurn® TR: Extremely stable system that avoids micro-vibrations.

T-Max® P: First choice for general turning from small components to heavy machining.

See complete assortment

CB7115

​First-choice CBN grade for high feed and/or depth of cut in continuous to light interrupted cuts at high speed.

CoroTurn® 10​7: First choice for external and internal machining of small and slender components.

CoroTurn® TR: Most stable system to avoid micro vibrations.

T-Max® P: First choice for general turning from small components to heavy machining.

See complete assortment

CB7105

First-choice CBN grade for low feed and continuous cuts in stable conditions at highest speed in case- and induction-hardened steel.​

CoroTurn® 107: First choice for external and internal machining of small and slender components.

CoroTurn® TR: Most stable system to avoid micro vibrations.

T-Max® P: First choice for general turning from small components to heavy machining.

See complete assortment

CB7525

​First-choice CBN grade for heavy interrupted cuts at low to medium speed in case- and induction-hardened steel.

CoroTurn® 107: First choice for external and internal machining of small and slender components.

T-Max® P: First choice for general turning from small components to heavy machining.

See complete assortment

Complementary grades

CC670

​Whisker-reinforced SiAlON-based ceramic with excellent bulk toughness, recommended for hardened steel under unfavourable conditions.

View complete assortment

CC6050

​Mixed Al2O3-based ceramic with good thermal properties and wear resistance, primarily recommended for light to continuous finishing.

View complete assor​tment

GC4305

​CVD-coated carbide grade for medium to roughing applications with continuous cuts at low speeds in hardened materials.

View complete assortment

GC4315

​CVD-coated carbide grade for finishing to roughing in applications with continuous cut to light intermittence in hardened materials.

View complete assortment

H13A

​Uncoated carbide grade that combines good abrasive wear resistance and toughness for turning hardened materials at low speed.​

View complete assortment

Highlights

Turning calculator app

Designed to assist engineers, programmers and machinists, this app offers valuable machining and cost calculations.

Struggling to find the right tool for the job?

Let CoroPlus™ ToolGuide help you get quick and accurate tool recommendations – on all your devices!

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Hard part turning with CB7105 and CB7115

The new grades are based on the newest generation Cubic Boron Nitride (CBN) material. This material enhances crater wear resistance and fracture resistance at high cutting speed in case hardened and induction hardened material.

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