(Sandvik Coromant U.S.: Mebane, NC) -- Sandvik Coromant, a leader in cutting tools and tooling systems, introduces GC1220, its latest indexable milling insert grade for nodular cast iron, designed to deliver better performance, reliability, and efficiency. At the heart of GC1220 lies a breakthrough in coating technology—the nano-multilayer physical vapor deposition (PVD) coating developed using Sandvik Coromant’s Zertivo coating process.

GC1220 is engineered to tackle the toughest cast-iron machining challenges. Whether operating in wet or dry conditions, it offers exceptional resistance to abrasive wear and thermal cracking, ensuring stable and secure machining, even under the most demanding environments.

The continuous development of Zertivo, Sandvik Coromant’s unique PVD production technology, amplifies GC1220’s capabilities. The advanced nano-multilayer coating, a combination of TiAlN and TiSiN, delivers a synergy of edge-line toughness and wear resistance, typically considered a trade-off in conventional grades.

“GC1220 has a groundbreaking coating innovation delivering exceptional performance with security, predictability, and sustainability,” says Wayne Mayson, global product application manager for grades at Sandvik Coromant. “This new cast-iron milling grade builds on the same proven innovation as our successful GC1230 steel milling grade. With its advanced PVD coating and robust performance in demanding conditions, I’m confident that GC1220 will define a new level of performance for cast iron machining.”

GC1220 inserts are designed for longer and more predictable tool life, reducing downtime and increasing productivity. This reliability translates into a more efficient and sustainable production process, helping manufacturers meet performance and environmental goals.

Optimized for light roughing to finishing operations, GC1220 is ideal for a wide range of applications, from general machining to more challenging tasks such as square shoulder milling, cast-component feature interruptions, skin conditions, and complex tool paths. It’s the first choice for nodular cast iron (K3 classification) and can be used on malleable and grey cast irons (K1/K2 classification). It performs exceptionally well in both wet and dry conditions and is suitable for all industry segments, as well as a variety of component features.