SPMT120408-D51 WKP25S Wendeplatten - Walter Tools

Take advantage of a Tiger·tec Silver grade that balances wear resistance with stable chip formation and a D51 chipbreaker for predictable evacuation; the result is reliable productivity across steel and cast iron components. Order the insert via Metav Werkzeuge or consult our specialists for application advice.

SPMT120408-D51 WKP25S indexable milling insert — Walter Tools, Tiger·tec Silver, D51 chipbreaker

The SPMT120408-D51 WKP25S is a square 90° indexable milling insert designed for machining steel (P) and cast iron (K) in general industrial milling applications.

• Tiger·tec Silver coated for durable performance
• D51 chipbreaker for consistent chip control
• Square 90° geometry with 0.8 mm corner radius
• Suitable for steel (P) and cast iron (K) machining

Higher throughput through durable coating and controlled chips

The combination of the Tiger·tec Silver coating and the WKP25S grade improves wear resistance and contributes to stable chip formation, which reduces unplanned interruptions. The insert’s D51 chipbreaker is engineered to produce predictable chip shapes under the thermal and mechanical conditions typical when machining steel and cast iron, helping to maintain process stability. This leads to fewer tool changes and steadier cycle times in production environments where consistent output is critical.

Robust geometry for repeatable edge strength and surface quality

A square 90° plate geometry with a 0.8 mm corner radius delivers a strong cutting edge that resists edge chipping while maintaining a defined contact profile. The 11° clearance angle supports effective cutting action and contributes to repeatable part tolerances across multiple indexings of the edge. Because the specimen conforms to a tolerance class M, dimensional consistency is maintained, helping to reduce the need for rework and supporting quality assurance practices in serial machining.

Versatile grade tailored for industrial milling routines

The WKP25S grade is a coated carbide designed for a broad material spectrum according to ISO classifications P and K, so the insert is suitable for a wide variety of shop-floor tasks where abrasion resistance and edge stability are priorities. The combination of coating technology and chipbreaker geometry simplifies application selection: shop engineers benefit from a predictable performance window for both finishing and more demanding intermittent cuts. Integration into existing tool systems is straightforward when holders accept the SPMT120408 format, allowing quick swaps and minimised downtime.

For application recommendations, availability or to discuss the best insert selection for specific materials, contact Metav Werkzeuge by e‑mail at info@metav-werkzeuge.com or by phone at +49 2822 7131930 — our advisers will assist with technical fitment and delivery options.

Technical data

• Article number: SPMT120408-D51-WKP25S-WALTER
• SKU: SPMT120408-D51-WKP25S-WALTER
• Product: Indexable milling insert (square)

Facts

• Size: 12 mm
• Thickness: 04
• Corner radius: 0.8 mm
• Clearance angle: 11°
• Geometry: Square 90°
• Tolerance class: M

Special features

• Grade: WKP25S
• Series: Tiger·tec Silver
• Chipbreaker: D51
• Insert material: Coated carbide
• Applicable materials: Steel (P), Cast iron (K)
• Execution: T
• Manufacturer: Walter Tools

FAQ

Which materials is the insert suitable for?
The WKP25S grade is intended for steel (P) and cast iron (K) machining as classified by ISO 513; the insert delivers balanced wear resistance and chip control for these groups.

What benefits does the Tiger·tec Silver coating provide?
The Tiger·tec Silver coating improves surface hardness and wear resistance of the cutting edge, helping the insert maintain performance under the thermal loads encountered during steel and cast iron machining.

How does the D51 chipbreaker affect machining?
The D51 chipbreaker is designed to produce short, controlled chips and to support reliable chip evacuation, which reduces the risk of built-up edge and improves process stability.

What does a 0.8 mm corner radius mean for cutting tasks?
A 0.8 mm corner radius increases edge strength compared with smaller radii, making the insert more robust in interrupted cuts while still enabling a reasonable surface finish.

Will the insert fit standard SPMT120408 toolholders?
The insert follows the SPMT120408 format and is compatible with toolholders designed for that standard form factor, enabling straightforward replacement in existing milling bodies.

Manufacturer / Responsible: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen; Germany

Protected trademarks and trade names remain the property of their respective owners. Brand names are mentioned for explanatory purposes only; no connection between our company and the named brands is implied. The offered article is an original, factory-new product from the manufacturer.