CBN Turning Inserts | Lathe Tool Supplier | Cutwel Ltd
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CBN Turning Inserts

Cubic Boron Nitride Turning Insers for Hardened Steels up to 70HRC

Turning hardened steel (45-70 Rockwell) with a sintered carbide insert is not normally possible and will result in rapid tool failure and, depending on the metal hardness, not even cut the metal. Typically, most people will send hardened or heat treated turning parts away for grinding which can be a slow and expensive process. 

 

Cubic boron nitride (CBN) offers a cost alternative to grinding with stable and long tool life.  A piece of CBN is brazed onto a solid carbide blank to create a CBN turning insert. CBN Inserts are available in 4 forms:

  • Regrindable (single edge)
  • Non-regrindable (multi edge)
  • Non-regrindable coated (multi edge)
  • No-regrindable (single edge)

 

 

CBN turning inserts from Korloy will fit into your existing turning tool holder or boring bar. Simply match up the first 2 letters of the insert code (e.g. CNMG carbide insert = CNGA CBN turning inserts). Due to the hardness of CBN inserts, they are very brittle and vibration can cause them to chip easily.  To prevent tool failure we recommend always to use double clamp turning tools or boring bars such as a DCLNR, DDJNR or DTGNR which can help eliminate tool failure caused by vibration.  Buy online today.

  • Special PVD coating for turning hardened steels at high speeds
  • Increased tool life and performance over uncoated CBN
  • Multi-edge inserts (up to 6 non-regrindable edges per insert)

 

Grade Guide:

  • DNC250 - Hardened Steel (High speed continuous cutting, 120-220m/min)
  • DNC350 – Hardened Steel (Medium/low speed interrupted cutting, 90-150m/min)
  • Single-edge inserts (1 REGRINDABLE edge per insert)
  • Larger piece of CBN compared to single use type

 

Grade Guide:

  • KB420 - Hardened Steel (Medium/high speed continuous cutting, 120-150m/min)
  • KB410 - Hardened Steel (High speed continuous cutting, 150-200m/min)
  • KB320 – Hardened Steel (Medium/low speed interrupted cutting, 80-120m/min)
  • KB330 – Hardened Steel (Low speed heavy interrupted cutting, 70-100m/min)
  • KB370 – Cast Iron & HRSA’s (High speed continuous cutting) 

COATED CBN INSERTS

REGRINDABLE UNCOATED CBN INSERTS

SINGLE USE NON-REGRINDABLE UNCOATED CBN INSERTS

  • Single-edge or multi-edge inserts
  • Inserts have a smaller, economical piece of CBN (non-regindable)

 

Grade Guide:

  • KB420 - Hardened Steel (Medium/high speed continuous cutting, 120-150m/min)
  • KB410 - Hardened Steel (High speed continuous cutting, 150-200m/min)
  • KB320 – Hardened Steel (Medium/low speed interrupted cutting, 80-120m/min)
  • KB330 – Hardened Steel (Low speed heavy interrupted cutting, 70-100m/min)
  • KB370 – Cast Iron & HRSA’s (High speed continuous cutting)