P4840P-8R-E77 WNN15 WNN15 Wendeplatten - Walter Tools

Take advantage of the combination of coated carbide WNN15, 8R‑E77 chipbreaker geometry and an open-series Walter grade for predictable cutting performance; order the insert directly via Metav Werkzeuge or consult our application specialists for matching recommendations.

P4840P-8R-E77 WNN15 – Indexable insert for drilling/reaming by Walter Tools

P4840P-8R-E77 WNN15 is an indexable insert designed for drilling and boring applications in industrial machining, offering a coated carbide grade and a chipbreaker optimised for consistent chip control.

• P4840P-8R-E77 indexable insert
• Coated carbide grade WNN15
• 8R‑E77 chipbreaker geometry
• Walter open-series grade

Reliable cutting performance for consistent cycle times

The insert delivers stable cutting behaviour through the WNN15 coated carbide grade, which is specified as a coated hardmetal material in the product matrix. The combination of grade and geometry aims to provide repeatable results in production environments where process stability is essential. The 8R‑E77 chipbreaker is engineered to improve chip formation and evacuation, reducing the risk of clogging and enabling steadier feed and speed choices. This translates into fewer interruptions and more predictable cycle times on the shopfloor.

Practical guidance for application and material selection

This indexable solution is intended for use in drilling and boring operations; suitability for specific workpiece materials must be verified in the product matrix. The P4840P-8R-E77 WNN15 designation identifies insert geometry, chip control form and Walter’s material grade—consult the technical matrix to confirm compatibility with particular alloys. For operations requiring high process reliability, selecting the correct grade and chipbreaker has a direct effect on tool life and surface finish, so matching the insert to the machining task is recommended.

Secure procurement and process integration

The open-series Walter grade offers flexibility for integration into existing tool holders and production setups. Using a standardised insert code simplifies inventory management and replacement procedures in a production context, supporting just-in-time replenishment and stable tool change routines. The coated carbide construction is aimed at enhancing wear resistance under typical cutting loads; for complex or high-demand applications, Metav Werkzeuge’s consultants can advise on the optimal cutting data and holder selection to preserve the tool edge and maintain throughput.

Contact Metav Werkzeuge for tailored application advice on the P4840P-8R-E77 WNN15 insert and to discuss stocking options at info@metav-werkzeuge.com or +49 2822 7131930

Technical Data

• SKU: P4840P-8R-E77-WNN15-WALTER
• Designation: P4840P-8R-E77 WNN15
• Label: Bohr-/Aufbohrwendeschneidplatte P4840P-8R-E77 WNN15 Walter Tools
• UID: P4840P-8R-E77-WNN15-WALTER

Facts

• Chipbreaker code: 8R‑E77
• Grade: WNN15
• Material specification: coated carbide (as per product matrix)
• Series: Walter Schneidstoffsorte - Serie offen

Special features

• Coating: coated hardmetal (beschichtetes Hartmetall)
• Application: drilling / boring operations (indexable insert)
• Recommendation: check product matrix for material suitability
• Manufacturer brand: Walter Tools

FAQ

What materials is the P4840P-8R-E77 WNN15 insert suitable for?
Suitability depends on the detailed product matrix; the P4840P-8R-E77 WNN15 is a coated carbide grade and material compatibility should be checked against the machining application before selection.

How does the 8R‑E77 chipbreaker improve machining?
The 8R‑E77 chipbreaker promotes controlled chip segmentation and evacuation, improving chip flow during drilling/boring and supporting more consistent cutting conditions.

Is the insert compatible with standard drilling holders?
The P4840P geometry follows common indexable insert conventions for drilling/boring; compatibility with a specific holder should be verified by matching the insert code and seating geometry.

What are the benefits of the WNN15 grade?
WNN15 is a Walter tools grade specified as a coated hardmetal that aims to balance wear resistance and versatility; confirmation of its suitability for a particular alloy is advised via the product matrix.

How should the P4840P-8R-E77 be specified in orders?
Specify the full designation P4840P-8R-E77 WNN15 and the Walter Tools brand to ensure correct grade and chipbreaker selection.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and protected trade names are mentioned solely for explanatory purposes. There is no connection between our company and the mentioned brands. The item offered is an original, factory-new product from the manufacturer.