YLHH R&D has released an enhanced FB-1 PCBN grade optimized for heavy interrupted hard turning, with ~65% CBN content and an improved binder system delivering approximately 20% better edge chipping resistance in validation tests.
Grade Characteristics
| Parameter | Enhanced FB-1 |
|---|---|
| CBN content | ~65% |
| Hardness range | HRC 55–68 hardened steel |
| Typical operations | Heavy interrupted cuts, profiling, facing |
| Compatible geometries | RNMN150700, SNMN150716, etc. |
Application Benefits
- Higher edge toughness for keyways, oil holes, and slotting in hardened parts
- Stable thermal conductivity and wear resistance for extended tool life in roughing cycles
- Pairs with RNMN and SNMN geometries for OD, facing, and profiling
Validation & Recommendations
Testing covered brake disc hubs, gear shafts, and mold inserts at HRC 58–62. Starting parameters: 80–120 m/min cutting speed, 0.08–0.15 mm/rev feed — contact our Application Support Center for tailored recommendations.