Very happy with the longevity in 4140 steel
Brand Manufacturer Equivalent Industry Grade Chipbreaker Equivalents SUMITOMO (Original) AC820P (General Steel CVD) -GU (Medium-Roughing Deflector) Sandvik Coromant GC4425 / GC4325 -PM / -MR Kennametal Inc
40 mm/rev Gray & Nodular Cast Iron (K-Class / Housing Components) 100 - 180 m/min ap: 1
W15 Wiper Technology | High-Efficiency Finishing | NS9530 Premium Cermet
Interchangeable globally with standard international metric MVQNL2525M16 precision left-hand top-clamped profiling and back-turning tools
CNMG120412 YBC252 (10pcs) ZCC.CT MWLNR1616H06 Very happy with the longevityCVD Coating: YBC252,Designation: CNMG120412 YBC252 CNMG433 YBC252 Dimension (mm): L: 12. 9,I. C: 12. 7,S: 4. 76,d: 5. 16,r: 1. 2, Workpiece Material: Steel: Normal Machining Condition Turning Cemented carbide and cermet Inserts