Hard turning made more cost effective with latest Kennametal inserts

The Kennametal KBH10B and KBH20B PcBN grade inserts for materials up to 65 HRc are designed to deliver higher productivity and longer tool life when turning tool steels and other hardened materials.

“Our double-sided KBH10B and KBH20B grade inserts are an excellent choice for high-volume production of hardened gears, shafts, bearings, housings and other drivetrain components, where tooling cost per part is an important metric,” says Robert Keilmann, product manager - turning.

Polycrystalline cubic boron nitride (PcBN) mini-tipped inserts have long been recognised as a good option for reducing part costs when turning hardened steel components. Kennametal’s latest PcBN grade inserts improve upon that value proposition by claiming to deliver increased productivity with a lower cost per part.

Features include a patented ceramic binder structure and TiN/TiAlN/TiN coating that provides high levels of wear resistance, even at elevated cutting speeds, says Kennametal. A gold PVD coating makes it easy to identify when an insert needs indexing, while the numbered corners ensure that a machine operator does not inadvertently switch to a used edge.

Two edge preparations in a ‘trumpet’ style hone allow for heavier and interrupted cuts, along with a light hone for continuous turning. Both are free-cutting, further extending tool life and generating surface finishes down to 0.2 Ra.

The PcBN mini tips are offered in four insert shapes – three rhomboidal and one triangular – which means up to six cutting edges per insert.