P4840C-7R-E77 WNN15 Wendeplatten - Walter Tools

Benefit from stable chip formation and the coated carbide WNN15 grade for consistent performance in drilling and counterboring. The optimised 7R-E77 chipbreaker increases productivity and reduces rework, while the indexable design keeps maintenance straightforward. Order the insert directly via Metav Werkzeuge or consult our specialists for application support.

P4840C-7R-E77 WNN15 — Drilling/Counterboring Indexable Insert by Walter Tools

P4840C-7R-E77 WNN15 is an indexable insert designed for drilling and counterboring applications, offering a coated carbide grade and a specialised chipbreaker for process-stable metalcutting.

Coated carbide grade WNN15
Optimised chipbreaker 7R-E77
For drilling and counterboring
Open-series Walter cutting grade

Maximised process reliability through material and grade

The WNN15 grade is a coated carbide class developed for broad industrial use; it aims to deliver stable chip formation and good tool life in a variety of machining tasks. Coatings reduce flank wear and help maintain cutting-edge integrity, which in turn supports repeatable part quality and longer intervals between index changes. For production environments where consistency matters, the combination of a wear-resistant grade and a tailored coating reduces scrap rates and increases throughput.

Geometry and chip control that cut cycle time

The 7R-E77 chipbreaker is engineered to control chip shape and evacuation during both drilling and counterboring cycles. Controlled chips lower the risk of surface damage and facilitate automated chip removal, improving component finish and reducing manual intervention. The indexable format allows quick replacement of the cutting edge without regrinding, supporting high machine utilisation and predictable maintenance planning.

Practical integration and application guidance

Dimensions and holder compatibility are catalogue-dependent, so confirming the exact insert size and clamping arrangement against the toolholder matrix is essential before specification. The insert is intended for use in indexable drilling assemblies and is supplied in the Walter open series; the exact workpiece material suitability should be verified against the product matrix. For additional machining data or to confirm suitability for specific materials, technical support is available.

Contact Metav Werkzeuge for tailored advice on Walter Tools inserts and to request application recommendations for the P4840C-7R-E77 WNN15 insert

Technical Data

• Article number: P4840C-7R-E77-WNN15-WALTER
• SKU: P4840C-7R-E77-WNN15-WALTER
• Product designation: P4840C-7R-E77 WNN15
• Product type: Drilling/counterboring indexable insert
• Manufacturer: Walter Tools
• Series: Walter Schneidstoffsorte - Serie offen
• Material (grade): Katalogabhängig

Facts

• Chipbreaker: 7R-E77
• Grade: WNN15
• Coating class: coated carbide
• UID: P4840C-7R-E77-WNN15-WALTER

Special features

• Optimised chip control geometry
• Indexable insert for economical edge replacement
• Catalogue-dependent dimensions and variants
• Sorteneinsatz: check product matrix for workpiece suitability

FAQ

What materials is this insert suited for?
The P4840C-7R-E77 WNN15 insert is a coated carbide grade intended for a broad range of materials; specific suitability should be checked in the product matrix for this Walter Tools insert.

How does the 7R-E77 chipbreaker improve performance?
The 7R-E77 geometry controls chip shape and evacuation, which helps maintain surface finish and reduces the need for secondary operations when using the Walter Tools drilling/counterboring insert.

Can the insert be used in existing indexable drilling holders?
Yes, the insert is designed for indexable drilling assemblies; confirm the exact size and clamping compatibility as dimensions are catalogue-dependent.

What are the main maintenance benefits of this indexable insert?
Exchangeable cutting edges minimise downtime and tooling costs; the WNN15 coated grade supports longer edge life and predictable maintenance intervals for production lines.

Where can machining data and application sheets be obtained?
Application data and machining recommendations for the P4840C-7R-E77 WNN15 insert are available from Metav Werkzeuge; technical enquiries can be made to the contact below.

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

Trademarks and trade names are the property of their respective owners. Brand names and protected product designations are mentioned solely for explanation and identification purposes. There is no affiliation between our company and the named brands; the offered article is an original, factory-new product of the manufacturer.