Turning Tools
Turning involves a fixed and non-rotating cutter, because in turning, the workpiece spins instead of the tool. Turning tools typically consist of a replaceable insert in a turning tool body. The insert can be distinctive in a number of ways, including shape, material, coating and geometry. The shape can be round to maximize edge strength, diamond-shaped to allow a sharp point to cut fine features, square, or even octagonal to increase the number of separate edges that can be applied as one edge after another wears out. The material is typically carbide, though ceramic, cermet or diamond inserts can be applied to more demanding applications. A variety of protective coatings also help these insert materials cut faster and last longer.
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Success Factors for Hard Turning
A rigid machine and hard cutting edge are the beginning. Other considerations relate to system rigidity and keeping the cutting force steady.
Video: PVD vs. CVD—How to Choose the Right Tool Coating
Machining footage of different coatings in both roughing and finishing passes reveals how choosing the right coating can have a dramatic effect on the performance of the process.
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Hard-Turning Grades Excel in Automotive Transmission Applications
Sandvik Coromant’s CB7125 and CB7135 grades are said to enable the performance of medium-to-heavy interrupted cuts and removal of the hardened layer (depth of cut up to 2 mm) in case- and induction-hardened steel components.
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