Sandvik inserts speed medical-sector turning

Sandvik Coromant has introduced a solution for the turning of hip joints that centres on the deployment of round inserts such as RCMT.

The advantages of this approach, when internal rough turning hip joint cups for example, is the production of a thinner chip, reducing heat and subsequent notch wear, as well as extending tool life significantly.

Secure, reliable machining is also possible at higher cutting speeds.

The result produced by round inserts is achieved due to a reduced entry angle, which also results in a reduced notch so that harder grades can be used to achieve higher speeds; and reduced chip thickness, offering the opportunity to increase feed rates.

Sandvik Coromant offers a range of insert grades for medical component materials.

For cobalt-chromium alloys used typically for hip joints, a suitable grade for round inserts is GC1105.

Its hard, fine-grained substrate more than doubles the attainable cutting speed offered by the previous generation H13A grade, while an ultra-thin, tough PVD coating extends its application to use with DNMG inserts.

For manufacturers seeking a productivity boost when turning HRSAs, S05F is said to be the optimum carbide solution.

Its hard, fine-grained substrate with thin CVD coating (better coating adhesion than PVD) provides higher cutting speeds.

Sandvik Coromant's Coroturn HP coolant delivery system has the ability to increase metal-removal rate by up to 50 per cent, as speeds and feeds can be increased while keeping temperature under control.

Coroturn HP features highly accurate, parallel laminar jets located close to the cutting edge that deliver coolant to a predefined target area on the insert face at pressures of up to 100 bar.

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