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CoroTurn Prime B-Type Inserts Provide All-Directional Turning

The insert is negative and double-sided, offering four cutting edges to increase productivity and tool life.

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Sandvik Coromant CoroTurn Prime B-type inserts flange in action. Photo Credit: Sandvik Coromant

Sandvik Coromant CoroTurn Prime B-type inserts flange in action. Photo Credit: Sandvik Coromant

Sandvik Coromant’s second-generation CoroTurn Prime B-type inserts are double-sided negative inserts featuring four cutting edges. They are designed for roughing and finishing in steel, stainless and duplex stainless steel, HRSA and titanium.

The company says the PrimeTurning method enables turning in all directions and provides a productive, efficient alternative to conventional machining. The concept includes the PrimeTurning method, CoroTurn Prime A- and B-type tools and the CoroPlus Tool Path for PrimeTurning software.

The second-generation CoroTurn Prime B-type tools have undergone a major upgrade. “We are continuously working on developing our PrimeTurning offering,” says Staffan Lundström, product manager at Sandvik Coromant. “The new B-type tools are improved in all aspects to further support all-directional turning.”

A key benefit is that the latest insert is negative and double-sided. Four cutting edges — twice the edges compared to the previous insert — enable more cost-efficient machining. The tool is also equipped with a robust tip seat design which prevents tool breakage if the insert breaks and enables shifting of feed directions without insert movements. Also, the geometries are updated for better chip control, even in very challenging materials such as duplex stainless steel and ductile steels.

The company’s test results have shown productivity increases ranging from 50% up to over 100%. One example is an automotive customer producing pump housings, where the CoroTurn Prime B-type inserts with turning grade GC4415, the -M7 geometry and R1.6 mm gave predictable edge wear and better chip control. Productivity and tool life increased by 115% and 200%, respectively.

The CoroTurn Prime B-type inserts are available for external and internal turning in a range of high-performing grades, including the new steel turning grades GC4415 and GC4425. Programming support is available in the most common CAM platforms and with CoroPlus Tool Path for PrimeTurning.

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