All-directional turning takes another turn

Global metal cutting leader, Sandvik Coromant introduces its second generation of CoroTurn® Prime B-type inserts. The new, double-sided negative insert features four cutting edges and is designed for roughing and finishing in steel, stainless and duplex stainless steel, HRSA and titanium.

PrimeTurning™ has, since its introduction in 2017, aptly been called the biggest innovation in turning, since turning. The method enables turning in all directions and is a productive and efficient alternative to conventional machining. The concept is comprised of 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™ offer,” 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 new insert is negative and double-sided. Four cutting edges — twice the edges compared to the previous insert — allow more cost-efficient machining. The tool is also equipped with a new robust tip seat design, which prevents tool breakage if the insert breaks and enables shifting feed directions without insert movements. Furthermore, the geometries are updated for better chip control even in very challenging materials, such as duplex stainless steel and ductile steels. 

Comprehensive test results have shown productivity increases ranging from 50% up to over 100%. One example is an automotive customer producing pump housings, where the new 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 new CoroTurn® Prime B-type inserts are available for external and internal turning in a range of high-performing grades, including new steel turning grades GC4415 and GC4425. Programming support is offered in the most common CAM platforms and with CoroPlus® Tool Path for PrimeTurning™.