Hard Turning Inserts and CBN Grades For Finish Machining Hardened Steel
1.Hard Turning Inserts CBN Grade and Application
Insert Grade | Suited Materials | Machining Type | Insert Image |
BN-S20 | Hardened Steel, Heat and abrasive resistant steel, High manganese steel | Roughing,Semi-Finishing | |
BN-H11 | Hardened Steel | Semi-Finishing,Finishing | ![]() |
BN-H20 | Hardened steel,Other materials | Semi-Finishing,Finishing | |
BN-H05 | Hardened Steel | Finishing | ![]() |
BN-H10 | Hardened Steel, high strength cast iron | Finishing | |
BN-H21 | Hardened Steel | Finishing |
2.Cutting Parameters for reference
CBN Content | Halnn CBN | Cutting Depth | Condition |
Low Content | BN-S20 | 1-10mm | Continuous~ Interrupt |
BN-H11 | ≤1mm | Continuous | |
BN-H05 | ≤0.2mm | Continuous | |
BN-H10 | ≤0.5mm | Continuous~Semi- Interrupt | |
BN-H21 | ≤0.5mm | Semi-Interrupt ~Heavy Interrupt |
3.Typical Application Case ~ Hard Turning Gears
Hard Turning Inserts BN-H10 CNGA continuous turning gears | ||||
![]() | Component | Gears | Materials | 20CrMnTi |
Hardness | HRC58~62 | Machining Condition | Dry Cutting | |
Insert Grade | BN-H10 CNGA120408 | Roughness requirements | Ra0.8 | |
Vc=180m/min, fr=0.1mm/r, ap=0.2mm | ||||
CBN Grade | PCBN Inserts | Halnn BN-H10 | Halnn BN-H10 C25 (Coating PCBN) | |
Machining Qty (pieces/insert) | 550 | 800 | 1200 | |
Tool Life | ...... | Improved 45% | Improved 118% |
4. Application
PCBN Inserts are mainly used for machining hardened steel and cast iron materials. Above cbn grade are mainly used for hard turning hardened steel, such as Gear Steel, Bearing Steel, Carbon tool steel, die steel, high-speed steel and so on.