MPHW120408-A57 WKP25S Wendeplatten - Walter Tools

Benefit from the combination of the Tiger‑tec Silver coating and the WKP25S grade for productive machining of steel and cast iron; the insert delivers stable chip control and extended tool life. Order the insert directly via Metav Werkzeuge or consult our specialists for application-specific recommendations.

MPHW120408-A57 WKP25S indexable milling insert, Tiger‑tec Silver — for steel and cast iron | Walter Tools

The MPHW120408-A57 WKP25S indexable milling insert provides abrasion-resistant, high-productivity cutting for general milling applications in steel and cast iron, using a coated carbide grade optimised for demanding industrial use.

• Tiger‑tec Silver coating for long tool life
• WKP25S grade optimised for steel and cast iron
• A57 chipbreaker for stable chip control
• 11° relief angle with 0.8 mm corner radius

Improve productivity with advanced coating and grade

The combination of Tiger‑tec Silver and the WKP25S carbide grade is engineered to extend tool life under typical milling stresses. The coating reduces flank and crater wear, which in turn lowers the frequency of index changes and tooling downtime. For production environments this translates into a measurable increase in machining uptime and a reduced cost per component, since fewer inserts are exchanged over the life of a toolholder. The result is a robust balance of durability and consistent cutting performance.

Consistent chip formation and surface quality

The A57 chipbreaker geometry is designed to control chip flow and reduce burr formation, delivering a more consistent surface finish on the workpiece. Combined with the 11° relief angle and a 0.8 mm corner radius, the geometry moderates cutting forces and helps prevent premature edge chipping. For machinists unfamiliar with chipbreaker terminology: the chipbreaker interrupts and shapes the metal chips so they eject safely and predictably, improving both process reliability and component quality.

Versatile use across steel and cast iron (ISO P/K)

This insert is specified for machining groups P and K, meaning it is suitable for a wide range of steel and cast iron applications as classified by ISO 513. The grade’s wear behaviour is tuned to the thermal and abrasive conditions typically encountered when cutting these materials. In practice, this versatility supports mixed-production environments where batches include both unalloyed or alloyed steels and various cast irons, reducing the need for frequent tool changes and simplifying inventory.

Precision fit and repeatable positioning for production tools

The MPHW geometry and the tolerance class H ensure precise seating in compatible cutter bodies, supporting repeatable indexability and reliable clamping accuracy. Key dimensions such as the plate size 12 and the plate thickness 04 describe the insert form factor for correct toolholder matching; adherence to these dimensions helps maintain cutter balance and predictable cutting behaviour in automated or high-feed setups. Where process stability is essential, the proven insert geometry assists in achieving consistent cycle times and predictable tool life.

For tailored cutting data, holder compatibility checks or delivery options for the Walter Tools Tiger‑tec Silver MPHW120408-A57 WKP25S insert, contact Metav Werkzeuge for fast, application-focused advice — eMail: info@metav-werkzeuge.com / Tel: +49 2822 7131930

Technical data

• Article number: MPHW120408-A57-WKP25S-WALTER
• Designation: MPHW120408-A57 WKP25S
• Manufacturer: Walter Tools
• Product type: Indexable milling insert (milling insert)

Numbers / Core technical data

• Relief angle: 11°
• Corner radius: 0.8 mm
• Plate size: 12
• Plate thickness: 04
• Tolerance class: H

Special features / Versions

• Series: Tiger‑tec Silver
• Grade: WKP25S (coated carbide)
• Chipbreaker: A57
• Material suitability: P (steel) / K (cast iron)
• Execution: W

FAQ

What materials is this insert suitable for?
The MPHW120408-A57 WKP25S insert is specified for ISO groups P and K, making it suitable for machining steel and cast iron in a variety of production tasks.

How does the A57 chipbreaker affect machining?
The A57 chipbreaker shapes and controls chip formation to reduce burrs and improve surface finish; this leads to more predictable chip evacuation and better process reliability when using the WKP25S grade.

What does the Tiger‑tec Silver series provide?
The Tiger‑tec Silver coating enhances wear resistance and thermal stability, which extends the insert’s service life and supports higher productivity in continuous milling operations.

Which geometric features help prevent edge damage?
A combination of the 11° relief angle and 0.8 mm corner radius reduces cutting forces at the edge and improves edge robustness, helping to avoid chipping under moderate interrupted cuts.

Is the insert compatible with standard MPHW toolholders?
The MPHW120408-A57 form follows standard MPHW geometry; matching toolholders designed for MPHW inserts will deliver correct seating and repeatable clamping for consistent performance.

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

Die Walter AG (brand appearance: Walter Tools) is one of the world’s leading manufacturers of precision tooling for metalworking and is part of the Sandvik Group. Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanatory purposes only. There is no affiliation between our company and the named brands. The item offered is an original, factory-new product from the manufacturer.