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The Sandvik Coromant SPG GC3015 carbide indexable turning insert with flat top chipbreaker has a square shape with an 11-degree clearance angle and provides wear resistance without limiting shock resistance for turning of cast iron in average to good machining conditions. The single-sided positive insert has four cutting edges. It has an 11-degree clearance angle for light cutting forces and side clearance, making it better than a negative insert for internal turning. It can also be used for facing, interrupted cuts, and large lead angles. The GC3015 grade is a combination of carbide and a coating of TiCN, aluminum oxide, and TiN applied through medium temperature chemical vapor deposition (MTCVD). It provides hardness for wear resistance without limiting shock resistance when turning cast iron in average to good machining conditions. MTCVD coatings are deposited at lower temperatures than CVD coatings. The lower temperatures eliminate cracks in the coating and provide increased toughness and smoothness without limiting wear resistance. The coating also provides shock resistance during interrupted cuts.
The SPG GC3015 has a flat top chipbreaker that is designed for medium machining cutting depths and feed rates for cast iron. Tolerance of distance from the outer edge of the inscribed circle to the point of the square is + or - 0.001” and tolerance of the theoretical diameter of the insert is + or - 0.001”. Insert thickness tolerance is + or - 0.005”. Different insert shapes and sizes may have different inscribed circle (iC) measurements, which are related to the insert’s range of cutting depths, speeds, lead angle, and feed rates. The inscribed circle is the largest circle that can be drawn within the edges of the insert shape. In general, as the insert size and iC become larger, the maximum cutting depth increases. The cutting depth influences the metal removal rate, 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 be used to 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. Inserts are coded according to their specific cutting and application capability (e.g., VNMG 16 04 04-QM). Each part of the code represents details of the insert shape, nose angle, clearance angle, tolerance, size, geometry, grade, and chipbreaker style.
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 mould, and general engineering industries. All Sandvik Coromant inserts meet ISO and ANSI standards.Matching Inserts to Holders
These inserts are part of the Sandvik Coromant 111 Positive Insert family, which means they can be used in the CoroTurn 111 clamping system, which is an alternative to the CoroTurn 107 clamping system. The CoroTurn 111 system is used only for internal turning.
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