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Sandvik Grooving and Threading Cutter offers More Profiles

Story added 29 June 2011.

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Offering external and internal slotting, grooving and circlip grooving (with chamfer) as well as full profile internal threading, new inserts for Sandvik Coromant’s CoroMill® 328 offer customers a wider range of profile choices than previously available.

The combination of numerous cutting edges for enhanced productivity with sharp edges to generate high quality grooves and threads makes CoroMill 328 the ideal companion for machine shops seeking a wide capability range with a single tool.

Sandvik Coromant’s PVD-coated (TiAlN) micro-grained carbide grade, GC1025, is recommended to suit all ISO material groups thanks to its good resistance to thermal shock and notch wear, thus boosting manufacturing economics. Furthermore, CoroMill 328 accepts 2-8 inserts with each pocket-mounted, secure insert featuring three indexable cutting edges for highly productive, cost efficient machining. Four tool holders are available, but only a single insert size, maximising ease-of-use for operators. Weldon shank (B), arbor (Q) and bore with keyway (S) mounting configurations are achievable.

Suitable for both external and internal machining (in holes greater than 39 mm diameter), it is possible to perform shallow slotting, grooving and circlip grooving (1.1 to 5.15 mm widths) with chamfering in a single operation. The large range of inserts also allows the same operations to be performed externally with the addition of thread milling in pitches ranging from 1.5 to 6.0 mm.

Thread milling is an excellent alternative for tapped holes as it provides lower power consumption and good chip control. There are a number of conditions that dictate the preference for thread milling: when difficult materials cause undesirable chip evacuation problems; when machining non-rotating components; when machining up against a shoulder; when machining thin-walled components; and when greater flexibility regarding diameter and pitch range is required.