Practical hints

Insert selection - time for a geometry lesson The options you have are many, but the advice we give is unbeatable. Make your choice with confidence! Different geometries (wiper, chamfer and hone) plus a range of grades mean that there are many factors to consider when choosing the correct insert for your HPT machining strategy. The final choice will depend on your specific application, but this brief guide illustrates some general aspects to keep in mind. We also have more insert data available, plus extensive practical experience. For further information, contact a Sandvik Coromant applications expert directly. Contact us Simple guidelines when considering standard radius vs. wiper radius are: twice the feed rate gives the same surface finish; the same feed rate gives twice as good a surface finish. Standard radius vs. wiper radius. A standard radius produces a certain surface finish at a certain feed rate. A wiper radius can produce this same finish profile at twice the feed rate, or twice as good a finish profile at the same feed rate. CBN inserts from Sandvik Coromant have wiper options optimized for specific applications. WH (wiper HPT) generates low cutting forces for best surface integrity; WG (wiper general) permits higher feed capacity. Standard Wiper Sourface roughness (Rz) Feed, mm/r (fn) Sandvik Coromant inserts have application-optimized wipers. Crater wear resistance Toughness Virtually all HPT inserts have a chamfer, which is essential for controlling their performance. In addition, a honed edge is less sensitive to chipping and generally performs more consistently. Crater wear resistance Toughness Small angle Large angle Chamfer angle Chamfer angle influences wear resistance and toughness. previous

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