Sumitomo CNMG432EGUW AC405K CVD Coated Carbide Turning Insert (2 Pcs)

These are new, factory-inspected Sumitomo Electric CNMG432EGUW (metric: CNMG120408N-GUW) carbide turning inserts in grade AC405K, made in Japan and supplied in a standard 10-pocket blue insert tray (2 inserts shown). Decoding the ISO designation: C = 80° rhombic (diamond) shape, N = 0° clearance angle (negative rake), M = ±0.05/±0.08 mm tolerance class, G = double-sided with countersunk hole and chip grooves on both faces, 12 = 12.7 mm inscribed circle (IC), 04 = 4.762 mm thickness, 08 = 0.8 mm nose radius; the "N-GUW" suffix denotes the Sumitomo GUW chipbreaker geometry, engineered for medium turning with wide-ranging chip control. Grade AC405K is a CVD multi-layer coated carbide (TiCN/Al₂O₃ outer layers over a tough substrate) from Sumitomo's AC400K series, confirmed for ISO material groups P, M, K, H, N, and S as shown on the box label, suitable for continuous, light interrupted, and heavy interrupted cuts. Compatible toolholders accept CNMG 432 / CNMG 120408 inserts (e.g., PCLNR/L, MCLNR/L, DCLNR/L style holders); TEM number 66847 and lot H2271 are Sumitomo internal traceability codes visible on the package label.

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