The Sandvik Coromant APMT GC4240 carbide shank protection insert has a parallelogram shape, highest edge security (M), and provides good shock resistance without limiting wear resistance for medium-machining of steel in difficult-to-average machining conditions. A combination of carbide and a thin multilayer coating of titanium carbon nitride (TiCN), aluminum oxide (Al2O3), and titanium nitride (TiN) applied through medium temperature chemical vapor deposition (MTCVD) provides toughness to protect the tool shank when making contact with the workpiece in demanding operations. MTCVD coatings are deposited at lower temperatures than chemical vapor deposition (CVD) coatings, resulting in the appearance of few or no cracks in the coating and providing improved toughness and smoothness compared to CVD coatings.
This positive insert is used with the 30 mm to 50 mm diameter versions of the CoroMill 216 ball nose milling insert holder, a screw-style holding system for contoured profiling, ramping, and slotting of 3D shapes. The insert has a hole in the center, two cutting edges, and an 11-degree clearance angle. It has an M edge performance type for highest security.
Milling inserts are coded according to their specific cutting and application capability (e.g., APMT-16-04-08-M). Each section of the code represents details of the insert: shape, clearance angle, tolerance class, insert type, cutting edge length, thickness, radius, and edge performance. Tolerance of the inscribed width (iW) of the insert is + or - 0.05 mm. Insert thickness tolerance is + or - 0.13 mm. Insert shapes and sizes may have different cutting depths, speeds, lead angles, and feed rates. Generally, as the insert size and iW becomes larger, the maximum cutting depth increases. Cutting depth influences the metal removal rate, the number of cuts, chip evacuation, and power required when using the insert. Indexable inserts are small cutting tools designed to remove material in external and internal cutting applications such as turning, milling, drilling, and grooving. They are held by an insert holder, have multiple cutting edges, and can be rotated when one edge wears down. Multiple inserts can accomplish a variety of cuts in one operation. An insert is either positive or negative, which refers to the rake or clearance angle at which the insert removes material.
Sandvik Coromant produces tools for turning, milling, and drilling. Headquartered in Sweden and represented in 130 countries, the company manufactures tools used throughout the metalworking field, including the automotive and aerospace, die and mold, and general engineering industries. Matching Inserts to Holders
These inserts are used with the 30 mm to 50 mm diameter versions of the Sandvik Coromant CoroMill 216 ball nose milling insert holder, a screw-style holding system. The CoroMill 216 is used in high-feed profile milling of 3D shapes, and roughing and semi-finishing applications. The system offers high productivity.