P4840P-4R-E77 WNN15 WNN15 Wendeplatten - Walter Tools

Take advantage of the combination of coated carbide performance and a dedicated 4R‑E77 chipbreaker for consistent chip control and stable machining. Order the P4840P-4R-E77 WNN15 directly via Metav Werkzeuge or consult our advisors for application matching.

P4840P-4R-E77 WNN15 — Drill/Boring indexable insert with 4R‑E77 chipbreaker by Walter Tools

The P4840P-4R-E77 WNN15 is a coated‑carbide indexable insert tailored for drilling and boring operations, offering controlled chip formation and reliable cutting performance in a Walter open series grade.

• Coated carbide grade WNN15
• 4R‑E77 chipbreaker for stable chip control
• Designed for drilling and boring inserts
• Open-series grade for broad application range

Reliable chip control for uninterrupted production

The combination of the WNN15 grade and the 4R‑E77 chipbreaker creates a balance between wear resistance and predictable chip formation. The coated‑carbide construction provides improved surface hardness and thermal stability compared with uncoated grades, which helps maintain edge integrity during continuous drilling and boring cycles. For production environments where repeatability matters, this indexable insert reduces the frequency of unexpected tool changes and supports a smoother machining rhythm, helping to protect spindle time and minimise scrap rates.

Versatility across drilling and boring tasks

Built as part of an open series Walter grade, the insert is intended for versatile use across a range of drilling and enlargement operations; however, specific material suitability depends on the chosen machining parameters. Coated carbide typically performs well in interrupted cuts and higher temperatures than uncoated alternatives, delivering a practical compromise between toughness and wear resistance. For acceptance into a machining process, check the product matrix to confirm the WNN15 grade suits the target workpiece material and desired cutting data.

Clear identification and straightforward integration

The ISO designation and part coding, such as the P4840P‑4R‑E77 identifier, simplify inventory control and ensure correct replacement in multi‑tool assemblies. The insert’s chipbreaker geometry is optimised for controlled evacuation during drilling and boring, helping to avoid rework caused by poor chip disposal. Where toolholding systems require precise indexing, the standardised designation assists with rapid selection and replacement, supporting stable cycle times and predictable tool life in production workflows.

For technical matching of Walter Tools grades and to discuss how the P4840P‑4R‑E77 WNN15 fits specific drilling or boring applications, please contact Metav Werkzeuge for tailored advice and ordering support.

Technical Data

• Article number: P4840P-4R-E77-WNN15-WALTER
• Part designation: P4840P-4R-E77 WNN15
• Product type: Bohr-/Aufbohrwendeschneidplatte
• Series: Walter Schneidstoffsorte - Serie offen
• Chipbreaker: 4R-E77
• Material: Katalogabhängig

Facts

• ISO designation: P4840P-4R-E77 WNN15
• Grade: WNN15 (coated carbide)
• Designation without grade: P4840P-4R-E77
• SKU: P4840P-4R-E77-WNN15-WALTER

Special features

• Coated carbide grade WNN15
• Optimised chip control via 4R‑E77 chipbreaker
• Intended use: drilling and boring inserts
• Compatibility: check product matrix for material suitability
• Series description: Walter Schneidstoffsorte - Serie offen

FAQ

What is the primary advantage of the 4R‑E77 chipbreaker?
The 4R‑E77 chipbreaker on the P4840P‑4R‑E77 WNN15 promotes stable chip formation and easier evacuation during drilling and boring, reducing the risk of chip‑related interruptions.

Which materials is this insert suitable for?
The WNN15 grade is a coated‑carbide option; suitability for specific materials must be verified using the product matrix and machining data to ensure optimal performance.

How is the P4840P‑4R‑E77 identified for stock and replacement?
Identification uses the ISO designation P4840P‑4R‑E77 WNN15 and the SKU P4840P-4R-E77-WNN15-WALTER, which helps ensure correct replacement and integration into tooling systems.

Does the grade require special cutting parameters?
As a coated grade, WNN15 typically benefits from parameters tuned for carbide inserts and the particular chipbreaker geometry; consult tooling recommendations and the product matrix for exact cutting data.

Can the insert be used for both drilling and boring operations?
Yes; the design is intended for drilling and boring inserts, but final application suitability should be confirmed against the product matrix for the target workpiece material.

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

Mark protected names and trademarks are the property of their respective owners and are mentioned here for identification and explanatory purposes only. There is no affiliation between our company and the trademark holders. The offered article is an original, factory‑new product from the stated manufacturer.