The Sandvik Coromant R245 H10 right-hand uncoated carbide indexable milling insert has a square shape and an AL chipbreaker, and provides good wear resistance without limiting shock resistance for light machining of aluminum in average-to-good machining conditions. Uncoated fine-grained carbide offers high edge sharpness. This positive insert is used with the CoroMill 245, a screw-style insert holding system for use in face milling applications. The insert is available with a light-machining (AL) chipbreaker and has an E edge performance type for highest sharpness and precision. A square shape provides strong cutting edges. The insert has a hole in the center, four cutting edges, and a 29-degree clearance angle. Milling inserts are coded according to their specific cutting and application capability (e.g., R245-12 T3 E-AL). Each section of the code represents details of the insert: hand, compatible toolholder series, insert width, insert thickness, edge performance, and chipbreaker style. Insert shapes and sizes may have different inscribed circle (iC) measurements, which relate to ranges of cutting depths, speeds, lead angles, and feed rates. The iC is the largest circle that can be drawn within the edges of the insert shape. Generally, as the insert size and the iC become larger, the maximum cutting depth increases. Cutting depth influences the metal removal rate, the number of cuts, chip evacuation efficiency, 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 Sandvik Coromant CoroMill 245, a screw-style insert holding system. This system is for light- to medium-machining face milling and mirror-finishing applications. It is also available with exchangeable cassettes for use in roughing and semi-finishing operations. When used with the CoroMill 245, this insert has a 45-degree lead angle and 45-degree entering angle, giving a smooth entry into the cut and producing a thinner chip than an insert with a larger lead angle. The radial and axial cutting forces are balanced, limiting vibration in long overhangs and in smaller or weaker setups.
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