LNMU201012-F57T WKP25S Wendeplatten - Walter Tools

Benefit from a balance of high productivity, broad material coverage and robust edge stability to keep machining processes running reliably; order or request tailored cutting data via Metav Werkzeuge when required.

LNMU201012-F57T WKP25S indexable milling insert by Walter Tools — Tiger·tec Silver, for steel and cast iron (F57T)

The LNMU201012-F57T WKP25S is a rectangular indexable milling insert designed for heavy-duty and general-purpose milling of steel and cast iron, offering a wear-resistant coating and an optimised chipbreaker for stable, repeatable performance.

• Tiger·tec Silver coating technology
• Optimised chip control with F57T chipbreaker
• Rectangular 20 mm insert with 1.2 mm corner radius
• Negative rake 0° for robust cutting

Increased process efficiency through advanced coating and grade

The Tiger·tec Silver coating combined with the WKP25S grade provides a measurable improvement in wear resistance and thermal stability when machining ferrous materials. Designed for ISO group P (steel) and K (cast iron), the insert's coated cemented carbide substrate resists abrasive wear and reduces crater formation under typical steel cutting temperatures. This results in longer edge life, fewer indexings and a more predictable tool cycle — advantages that directly support higher throughput and lower per-part tooling costs.

Stable cutting edge geometry for consistent surface quality

A rectangular plate form with a 1.2 mm corner radius and a 0° (negative) free angle gives a strong, supporting cutting edge that tolerates interrupted cuts and heavy radial engagement. The geometry promotes consistent workpiece finish while protecting the cutting edge from mechanical overload. For operations where robustness matters more than the smallest achievable corner radii, this configuration reduces the risk of premature edge chipping and maintains dimensional accuracy over longer tool life.

Reliable chip control and reduced downtime

The F57T chipbreaker is engineered to manage the typical chip forms of steel and cast iron, producing short, controlled chips that evacuate reliably from the cut. Better chip control lowers the chance of surface re-cutting and tool interference, which in turn reduces machine stoppages for cleaning and rework. The combination of grade and chipbreaker therefore not only improves machining stability but also simplifies process parameters, making it easier to establish repeatable cutting data for series production.

Practical applications and integration into milling systems

Suited for a range of milling operations on unalloyed and alloyed steels as well as grey and nodular cast irons, this insert is appropriate for slotting, face milling and shoulder milling where a robust edge and consistent chip control are required. The plate thickness and 20 mm seat dimension allow straightforward integration into standard rectangular cutter bodies that accept this ISO-style designation. For process planners, the clear ISO material group alignment and the proven Tiger·tec Silver technology enable quick selection and reduced trial time during process development.

Contact Metav Werkzeuge for specific cutting data, availability and an application consultation tailored to Walter Tools LNMU201012-F57T WKP25S and production requirements

Technical data

• Article number: LNMU201012-F57T-WKP25S-WALTER
• SKU: LNMU201012-F57T-WKP25S-WALTER
• Series: Tiger·tec Silver
• Grade: WKP25S
• Chipbreaker: F57T

Facts

• Plate form: Rectangular
• Plate size: 20 mm
• Plate thickness: 10 mm
• Corner radius: 1.2 mm
• Free angle: 0° (negative)
• Tolerance class: M

Special features

• Suitable for ISO P (steel) and ISO K (cast iron)
• Coated cemented carbide grade
• Robust edge for interrupted cuts
• Designed for process-stable milling applications
• Manufacturer: Walter Tools

FAQ

What materials is this insert designed to machine?
The LNMU201012-F57T WKP25S insert from Walter Tools is intended for machining steel (ISO group P) and cast iron (ISO group K), reflecting the grade's optimisation for those material families.

What is the advantage of the Tiger·tec Silver coating?
The Tiger·tec Silver coating on the WKP25S grade improves wear resistance and thermal stability, providing more consistent tool life and fewer unscheduled indexings during serial milling.

How does the F57T chipbreaker affect machining?
The F57T chipbreaker produces short, controlled chips for both steel and cast iron, reducing the chance of re-cutting and improving evacuation, which helps maintain stable cutting conditions and surface quality.

Why is the 0° negative free angle beneficial?
A 0° (negative) free angle creates a stronger cutting edge that better resists mechanical shock and edge chipping, making the insert suitable for heavy engagement and interrupted cuts.

Can this insert be used in standard rectangular cutter bodies?
Yes, the 20 mm rectangular form and 10 mm thickness correspond to common cutter seat geometries for this ISO-style designation, allowing straightforward replacement in compatible milling bodies.

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned solely for explanation. There is no affiliation between our company and the mentioned manufacturers. The described article is an original, factory-new product of the manufacturer. Manufacturer: Walter Tools; part of the Sandvik Group. Manufacturer/Responsible: AB Sandvik Coromant, Mossvägen 10, 811 34 Sandviken, Sweden; support.coromant@sandvik.com