Walter USA's WKV10, WKV20 Insert Grades Benefit Cast Iron Turning


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Walter USA’s WKV10 and WKV20 ​​​​insert grades for the Perform line of turning tools are marketed as versatile and cost-effective for small- and medium-batch applications in cast iron (ISO K).  These negative-geometry grades supplement corresponding grades for steels that the company introduced last year.

The inserts are designed to benefit shops that have difficulties measuring the tool life of an insert and change inserts at set intervals. Both the WKV10 and WKV20 grades feature a CVD coating said to be extremely wear-resistant. As such, they can be used for a range of materials and applications.

The grades are available in two geometries: MV7 (medium machining) and RV7 (roughing). In field testing, the inserts demonstrated process reliability with good chip control and tool life. 

Along with these new grades for cast iron, Walter has also introduced the FV4 (finishing) and MV4 (medium) positive geometries. These geometries are primarily designed for steel and associated with the WPV10 and WPV20 grades.


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