P4840C-8R-E77 WNN15 Wendeplatten - Walter Tools

Benefit from the combination of WNN15 coated carbide and the 8R-E77 chipbreaker for reliable chip control and consistent hole quality; this delivers productive machining with controlled wear. Order the insert directly via Metav Werkzeuge or consult the technical team for application-specific advice.

P4840C-8R-E77 WNN15 — Drill/boring indexable insert, coated carbide, 8R-E77 by Walter Tools

P4840C-8R-E77 WNN15 is an indexable insert engineered for drilling and boring operations, combining a coated cemented carbide grade with a dedicated chipbreaker geometry for stable machining performance

• Coated carbide grade WNN15
• 8R-E77 chipbreaker geometry
• Designed for drilling and boring
• Stable cutting edge, consistent holes

Enhanced process stability through a dedicated grade and chip control

The combination of the WNN15 coated carbide grade and the 8R-E77 chipbreaker is designed to deliver process stability during interrupted and continuous drilling routines. The coated cemented carbide provides a balance between wear resistance and toughness, while the chipbreaker geometry supports efficient chip formation and evacuation. As a result, the machining process benefits from reduced risk of built-up edge and fewer unplanned interruptions, which helps maintain cycle times and part tolerances. Material suitability should be verified in the manufacturer product matrix to ensure optimal results.

Improved hole quality with consistent cutting behaviour

The optimised geometry promotes a steady cutting action that contributes to consistent hole quality and improved surface finish. By controlling chip form and direction, the insert reduces the likelihood of poor surface appearance and hole deviation. The indexable design allows for predictable changeover and repeatable positioning of the cutting edge, which supports tighter manufacturing tolerances. These characteristics make the insert a suitable option where reproducibility and low reject rates are priorities in production.

Economical machining strategy and application guidance

Using an indexable solution like this insert supports an economical machining strategy through straightforward edge replacement rather than full-tool exchange. The specification P4840C-8R-E77 WNN15 indicates a standardised designation that assists in stock management and quick identification during tool changes. For specific component materials and cutting parameters, refer to the Walter Tools documentation and the product matrix; this ensures that the combination of grade, coating and geometry is matched to the intended application and contributes to the most cost-effective machining outcome

For application support or to discuss the Walter Tools P4840C-8R-E77 WNN15 in detail, contact Metav Werkzeuge GmbH at info@metav-werkzeuge.com or +49 2822 7131930 for tailored technical advice

Technical Data

• Article number: P4840C-8R-E77-WNN15-WALTER
• Product type: Drill/boring indexable insert
• Insert designation: P4840C-8R-E77 WNN15
• Grade: WNN15
• Series: Walter Schneidstoffsorte - Serie offen
• Chipbreaker: 8R-E77
• Material: Katalogabhängig
• Manufacturer: Walter Tools

Facts

• No dimensional data provided in the dataset
• No cutting parameter values supplied
• No weight or coating thickness figures available

Special features

• Coated cemented carbide
• Dedicated chipbreaker geometry 8R-E77
• Indexable insert for drilling and boring
• Sorteneinsatz: verify material suitability in product matrix

FAQ

Which materials is the insert suitable for?
Material suitability for the P4840C-8R-E77 WNN15 is not fully specified in the dataset; the WNN15 coated grade is formulated for a broad range of applications, but the exact workpiece materials should be checked in the manufacturer's product matrix.

What function does the 8R-E77 chipbreaker provide?
The 8R-E77 chipbreaker controls chip formation and evacuation, improving chip control and contributing to process stability and better surface finish when machining holes.

Is regrinding or recoating specified for this insert?
The dataset does not provide information on regrinding or recoating procedures for the insert; refer to Walter Tools’ technical documents for guidance on edge refurbishment or replacement policies.

For which operations is this insert primarily intended?
This indexable insert is intended for drilling and boring applications where consistent hole quality and controlled wear are required; consult the product matrix for recommended cutting conditions.

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 are mentioned for explanatory purposes only and imply no affiliation or endorsement by Metav Werkzeuge. The offered item is an original, factory-new product of the manufacturer Walter Tools. The Walter AG (brand appearance: Walter Tools) is part of the Sandvik Group and is referenced here solely to describe the product provenance.