Sandvik Coromant's high performance steel milling grade, GC1130, is now available for use with its CoroMill QD and CoroMill 331 groove milling cutters.

GC1130, which is the latest Zertivo grade from Sandvik Coromant, is described as ensuring high metal removal rates and secure performance levels in both wet and dry machining operations. The material is available for use with CoroMill 390, CoroMill 490 and CoroMill 495 shoulder and chamfer milling systems.

: The upgrade enhances both deep and narrow grooving operations.The company says that machine shops can now use grade GC1130 inserts with CoroMill QD for deep and narrow grooving in both external and internal roughing and finishing operations. Meanwhile, the extension of GC1130 inserts to the CoroMill 331, a multi-purpose side and face milling cutter, should expand groove milling capabilities to include grooving, double half side milling, shoulder milling, face milling, back face milling, gang milling, and circular ramping.

Besides the CoroMill QD and CoroMill 331, the insert grade is also available for use with CoroMill 790 and T-Max long edge (shoulder milling), CoroMill Century (face milling), CoroMill 170, and CoroMill 176 (gear milling).

According to the company the material can help avert several potential problems. “Issues such as flaking, abrupt chipping and thermal cracks are commonly encountered when milling materials in the ISO P application area, especially when faced with unfavorable tool paths, deep cavities or when using coolant,” says project manager Björn Ericsson. “GC1130 was therefore developed to help machine shops overcome the consequential effects of reduced insert life and unstable production.”

The grade is manufactured using a PVD production technology that is designed to enhance the grade’s advantages in particular high edge-line security and reduced flaking. In addition, a high-Cr content fine-grain substrate delivers high resistance to thermal cracks, helping ensure extended tool life.