P4840P-4R-A57 WKP25S WKP25S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and the WKP25S grade for consistent tool life and stable chip control when machining steel and cast iron; order directly via Metav Werkzeuge or consult the specialists for application support.

P4840P-4R-A57 WKP25S drilling/boring indexable insert — Tiger·tec Silver, 4R-A57 chipbreaker — Walter Tools

The P4840P-4R-A57 WKP25S is a drilling/boring indexable insert designed to deliver productive machining of steel and cast iron in industrial metal-cutting operations.

• Tiger·tec Silver coating for extended tool life
• WKP25S grade optimised for steel and cast iron
• 4R-A57 chipbreaker for controlled chip formation
• Designed for productive drilling and boring operations

Extended endurance through advanced coating technology

The Tiger·tec Silver coating is engineered to provide improved wear resistance and maintain a stable cutting edge over longer tool life. As a coated carbide grade, WKP25S combines a tough substrate with the coating’s thermal and abrasive protection to reduce flank and crater wear during continuous or interrupted cuts. For process planners this means fewer indexable insert changes, reduced downtime and a more predictable tool cycle time. The coating behaviour also contributes to consistent surface finishes, which supports downstream processes and reduces rework.

Geometry and chip control that boost productivity

The insert’s chip control is defined by the 4R-A57 chipbreaker, which shapes and breaks swarf to facilitate safe evacuation from the hole or bore. Controlled chip formation lowers the risk of built-up edge and reduces cutting forces, improving dimensional stability during drilling and boring cycles. The P4840P-4R-A57 designation indicates the specific geometry and seating form compatible with drilling/boring tool systems accepting this insert family, enabling straightforward integration into existing tool holders and reducing setup complexity. The net result is measurable gains in cycle-time efficiency and repeatability.

Application scope and machining advantages

This indexable insert is formulated for the ISO groups P (unalloyed and alloyed steel) and K (cast iron), addressing typical heat and chip characteristics of these material classes. The WKP25S grade is tuned for abrasive and adhesive wear modes common in steel and cast iron machining, offering a balance between toughness and edge stability. For production environments focused on throughput, the combination of grade, coating and chipbreaker supports stable performance across batches and helps maintain consistent component tolerances without continual process tweaking.

Contact Metav Werkzeuge for tailored application advice on Walter Tools Tiger·tec Silver inserts and availability — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• SKU: P4840P-4R-A57-WKP25S-WALTER
• Item designation: P4840P-4R-A57 WKP25S
• Type: drilling/boring indexable insert
• Grade: WKP25S
• Series: Tiger·tec Silver
• Chipbreaker: 4R-A57
• Material groups: P (steel), K (cast iron)
• Manufacturer: Walter Tools

Core specifications

• ISO designation: P4840P-4R-A57 WKP25S
• Designation without grade: P4840P-4R-A57
• Applicable materials flag: steel true, cast iron true
• UID: P4840P-4R-A57-WKP25S-WALTER

Special features

• Coating technology: Tiger·tec Silver
• Coated carbide grade
• Chip control geometry: 4R-A57
• Intended applications: drilling and boring operations

FAQ

What materials is this insert suitable for?
The P4840P-4R-A57 WKP25S insert from Walter Tools is intended for ISO groups P and K, meaning it is suitable for machining steel and cast iron.

How does the Tiger·tec Silver coating benefit production?
The Tiger·tec Silver coating on the WKP25S grade increases wear resistance and cutting-edge stability, which supports longer tool life and more consistent cycle times in industrial production.

What role does the 4R-A57 chipbreaker play?
The 4R-A57 chipbreaker promotes controlled chip formation, easing chip evacuation during drilling and boring and reducing the risk of built-up edge and tool overload.

Is this insert compatible with standard drilling/boring holders?
The designation P4840P-4R-A57 indicates a standardised insert geometry for drilling and boring tool systems that accept this insert family; compatibility should be verified against the tool holder catalogue.

What measurable production benefits can be expected?
Using the WKP25S grade with Tiger·tec Silver coating and a 4R-A57 chipbreaker generally delivers improved tool life, more stable cutting forces and greater repeatability in hole-making processes.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are used solely for explanation and identification purposes. The offered item is original, factory-new merchandise of the manufacturer.