Walter CBN Indexable Inserts Designed for ISO K, ISO H Materials

Walter’s WBK20 and WBK30 cubic boron nitride (CBN) indexable inserts for turning ISO H and ISO K materials are said to bring higher levels of productivity and reliability to the machining of materials such as cast iron and hardened steel. Both CBN grades are made from a substrate with a high CBN content and are suitable for roughing and finishing sintered steel with edge-preparation designs that have been optimized for their target applications. 

The WBK20 indexable inserts are tipped with the BN tip applied to the corners of the insert with high tensile strength by means of vacuum soldering. With its tipped configuration, WBK20 is exceptionally wear resistant and well suited for finishing of cast iron or powdered metal workpieces, the company says. Because of the higher CBN content, it is also well suited for roughing in hard turning applications.

The WBK30 grade is made from a solid CBN substrate that enables higher cutting speeds and, therefore, higher productivity in cast iron than indexable inserts made from carbide. The insert is well suited for heavy depth of cuts, roughing in cast irons, powdered metals and exceptionally tough applications (such as finishing with heavily interrupted cuts) in hard turning. 

In addition to the precision tool manufacturing process, a strong microgeometry on the cutting edge also contributes to the quality, productivity and process reliability of these turning inserts, with the microgeometry matched to the respective application. Walter offers both WBK20 and WBK30 CBN grades in all of the most popular ISO sizes and radii to complement its CBN turning range. These grades are said to be particularly beneficial for users from the automotive industry, general mechanical engineering and energy industry.