Milling grade suits high speed or hard metal machining

Sandvik Coromant’s new GC4220 grade promises 20-30 per cent improvement in productivity against the current grade, GC4020, thanks to the latest developments in grade technology, an improved substrate and coating. Suitable for use in medium to rough milling at the elevated temperatures created by high speed milling or hard materials, GC4220 provides security and predictability to maximise productivity and optimise high metal removal rate. GC4220 grade guarantees better security at higher speeds and higher feed rates than GC4020, good performance in unmanned production plus higher metal removal rate. The special strength of GC4220 lies in its resistance to crater wear and plastic deformation, common wear problems when running at high speeds and feeds. With its improved edge line strength and bulk toughness and its capacity to withstand increased cutting data, GC4220 is more predictable in dry milling, face and profile milling and ensures a good surface finish. GC4220 is suitable for application in all CoroMill tooling concepts.