LMT Kieninger Launches WPR-AP Finishing Insert
The new indexable insert targets steel and hardened-steel finishing with a claimed 30 percent gain in tool life.
Updated on Nov. 4, 2026 in Materials Science
LMT Kieninger has released the WPR-AP indexable insert for finishing operations. The insert uses a newly developed LCHK05M cutting material and Nanomold Red³ coating, and is available in sizes from 10 mm to 32 mm.
Why it matters
The insert is compatible with LMT Kieninger's existing screw-in, steel, and solid carbide holder systems, letting users keep current holders when switching. It may reduce tooling costs in applications typically performed with solid carbide tools.
The 30 percent tool-life gain is a manufacturer-reported figure, with the comparison baseline and test conditions not specified in the source. The insert is rated for steels, cast steels, high-temperature-resistant materials and hardened steels up to 60 HRC, but independent validation of these claims is not provided.
The players
LMT Kieninger
A German manufacturer of machining tools and tool-holding systems, known for its screw-in and solid carbide holder platforms.
The details
The WPR-AP features an optimised cutting edge geometry and is designed for machining steel, cast steel, high-temperature-resistant materials, and hardened steels. It is positioned as a spherical copying cutter that works within existing holder systems.
The Tech Race
The WPR-AP extends LMT Kieninger's established holder platforms by adding an insert that works with screw-in, steel and solid carbide holders already in use. It positions the company to compete on tooling cost against solid carbide tools in finishing work.
Machinists who already own LMT Kieninger holders can adopt the WPR-AP without replacing their toolholding. The insert may reduce per-part tooling costs where solid carbide tools are currently used.
The takeaway
Tool-life claims are most useful when compared against your own cutting data. Testing the WPR-AP on your steel grades before changing tooling will show whether the claimed 30 percent gain holds in your shop.
Further reading
Explore more on Materials Science and how new cutting materials are changing machining.
