P4840C-8R-E77 WN15 Wendeplatten - Walter Tools

With a focus on consistent drilling and boring performance, this indexable insert combines the uncoated carbide WN15 grade and the 8R‑E77 chipbreaker to deliver reproducible cutting behaviour and stable chip formation. The result is improved cycle reliability and predictable tool life, supporting efficient production planning. Order directly via Metav Werkzeuge or consult the technical team for application-specific advice.

P4840C-8R-E77 WN15 — Drilling/Boring indexable insert by Walter Tools (uncoated carbide, 8R‑E77)

P4840C-8R-E77 WN15 is an indexable insert designed for drilling and boring applications in industrial machining, providing a balance of robustness and chip control for general cutting tasks.

• Uncoated carbide grade WN15
• Designed for drilling and boring operations
• Walter open-series for versatile use
• Stable chip formation and productivity

Reliable cutting performance for consistent production

The insert is made in the Walter open series and uses the WN15 uncoated carbide grade, which is intended to provide a dependable cutting edge across a broad range of applications. The composition and geometry are chosen to promote consistent machining results, reducing scatter in cycle times. For users who require predictable outcomes, the material and design minimise the need for frequent process adjustments while maintaining repeatable hole quality and dimensional stability.

Controlled chip formation for safer, faster machining

Equipped with the 8R‑E77 chipbreaker, this insert is engineered to shape and evacuate chips effectively under many cutting conditions. Improved chip control reduces the risk of tool or workpiece damage and helps to maintain surface integrity during drilling and boring operations. The chipbreaker geometry supports steadier cutting forces, which can translate into higher achievable feed rates and improved productivity without compromising component finish.

Straightforward integration and application advice

The insert is supplied under the Walter Tools designation and fits into standard indexable tool systems compatible with the specified geometry. Selection of the correct grade and matching holder should be verified against the specific workpiece material, as the WN15 grade is an uncoated hardmetal and its suitability depends on the application matrix. For optimisation of machining parameters and holder configuration, Metav Werkzeuge offers detailed consultation to ensure the cutting solution is aligned with production goals.

For application support or to source the Walter Tools P4840C-8R-E77 WN15 insert directly, please contact Metav Werkzeuge for tailored advice and fast delivery options

Technical Data

• Article number: P4840C-8R-E77-WN15-WALTER
• Product name: Bohr-/Aufbohrwendeschneidplatte P4840C-8R-E77 WN15 Walter Tools
• Product type: Drilling/boring indexable insert
• Grade: WN15
• ISO designation: P4840C-8R-E77 WN15
• Manufacturer: Walter Tools
• Chipbreaker: 8R‑E77
• Series: Walter Schneidstoffsorte - Serie offen
• Material information: Katalogabhängig

Numbers / Core technical data

• No numerical specifications provided in the data

Special features / Designs

• Uncoated carbide (hardmetal) grade as indicated in the series description
• Intended for drilling and boring applications
• Versatile use across multiple workpiece materials — verify suitability against product matrix
• Designed for stable chip formation and productive cutting performance

FAQ

What materials is the P4840C-8R-E77 WN15 insert suitable for?
The WN15 grade is an uncoated carbide designed for versatile use; suitability for specific workpiece materials should be checked against the product matrix before application.

How does the 8R‑E77 chipbreaker improve machining?
The 8R‑E77 chipbreaker is shaped to control chip breakage and evacuation, supporting steadier cutting forces and reduced risk of chip-related damage when drilling or boring.

Is the insert compatible with standard toolholders?
Yes, the insert is intended for common indexable holder systems that accept the P4840C geometry; confirmation of holder compatibility is recommended prior to ordering.

Can the Walter Tools insert be used for finishing operations?
The insert is primarily specified for drilling and boring; finishing capability depends on machine setup, feed and speed settings, and the selected holder configuration.

What designation should be referenced when ordering replacement inserts?
Reference the full ISO designation P4840C-8R-E77 WN15 and the article number P4840C-8R-E77-WN15-WALTER to ensure correct item selection.

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

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