P4840P-8R-E67 WKP25S Wendeplatten - Walter Tools

Benefit from the combination of the Tiger‑tec Silver coating and the WKP25S grade for extended tool life and reliable chip control in demanding holemaking tasks. The coated carbide construction ensures stable edge performance when machining steel and cast iron, enabling productive drilling and hole enlargement operations. Order the P4840P-8R-E67 WKP25S via Metav Werkzeuge or consult our technical advisors for application-specific guidance.

P4840P-8R-E67 WKP25S — Indexable insert for drilling and hole enlargement, Tiger‑tec Silver, for steel and cast iron | Walter Tools

The P4840P-8R-E67 WKP25S is an indexable cutting insert designed for drilling and hole‑enlarging operations, optimised to handle a broad range of steel and cast iron applications with a focus on consistent chip formation and long tool life.

• Tiger‑tec Silver coating for longer tool life
• WKP25S grade for steel and cast iron
• 8R‑E67 chipbreaker for controlled chip formation
• Coated carbide construction with edge stability

Reliable performance for holemaking with measurable productivity gains

The coated grade delivers a clear productivity argument: WKP25S is a coated carbide grade developed to balance wear resistance and toughness. In practice, this means fewer tool changes and a lower rate of unexpected stoppages during drilling or hole enlargement, translating into measurable uptime improvements. The combination of the Tiger‑tec Silver surface technology and the insert geometry supports productive machining of unalloyed and alloyed steels as well as cast iron, providing consistent results across batch and single‑piece production.

Controlled chips and improved surface quality reduce secondary operations

The insert geometry together with the 8R‑E67 chipbreaker is designed to influence chip formation positively, producing short, controllable chips in cast iron and managed swarf in steel. Better chip control reduces the risk of tool jamming and component damage, which in turn cuts down on manual intervention and rework. For operations where surface integrity matters, the stable cutting edge and predictable chip behaviour contribute to improved surface finish and reduced downstream polishing or grinding.

Coating technology that extends service life and process stability

The Tiger‑tec Silver series is engineered for thermal stability and abrasion resistance, attributes that are particularly valuable in interrupted cuts or variable feed conditions often encountered in holemaking. The coating reduces flank and crater wear, helping to maintain a stable cutting edge over longer cycles. This technical profile supports economic machining: the initial investment in a coated insert is offset by extended tool life and consistent part quality over time.

Practical application scope and handling recommendations

The grade is specified for material groups P and K according to ISO classifications, i.e. steel and cast iron, making it suitable for a wide range of drilling and hole‑enlargement tasks. Selection of proper toolholders and secure clamping remains essential to take full advantage of the insert's properties. The insert is a practical choice for applications requiring a balance between resistance to abrasive wear (common in cast iron) and toughness for heat‑generating cuts in steel, enabling reliable tool performance across mixed production runs.

For assured process reliability with Walter Tools' Tiger‑tec Silver grade, contact Metav Werkzeuge for application advice and procurement assistance at info@metav-werkzeuge.com or call +49 2822 7131930 — our specialists will advise on optimal integration into existing processes.

Technical data

• Article number: P4840P-8R-E67-WKP25S-WALTER
• SKU: P4840P-8R-E67-WKP25S-WALTER
• Product: Bohr-/Aufbohrwendeschneidplatte (indexable insert for drilling/enlargement)
• Type designation: P4840P-8R-E67
• ISO designation: P4840P-8R-E67 WKP25S
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver

Facts

• Grade: WKP25S
• Chipbreaker: 8R‑E67
• Material groups (ISO): P, K
• Material of insert: coated carbide

Special features

• Coating: Tiger‑tec Silver
• Material suitability: steel and cast iron
• Design: indexable cutting insert for drilling/hole enlargement
• Application focus: stable chip formation and production drilling

FAQ

What materials is this insert suitable for? The P4840P-8R-E67 WKP25S is specified for ISO groups P and K, making it suitable for machining steel and cast iron in drilling and hole‑enlargement tasks.

What does the WKP25S grade offer? The WKP25S grade provides a coated carbide composition with a balance of wear resistance and toughness, enabling longer tool life and consistent cutting performance under typical steel and cast iron cutting conditions.

Which chipbreaker is used and why does it matter? The insert features the 8R‑E67 chipbreaker, designed to produce short, controllable chips to reduce the risk of tool clogging and improve operational continuity during holemaking.

Is the insert suitable for interrupted cuts or varying feeds? Yes, the combination of coating and grade stability supports interrupted cuts and variable feed conditions; the Tiger‑tec Silver coating helps to protect the cutting edge from thermal and abrasive wear.

Can this insert be used for both drilling and hole enlargement? The geometry and design make the insert appropriate for drilling and subsequent enlargement operations where an indexable insert solution is required.

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

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