P4840C-7R-E77 WN15 Wendeplatten - Walter Tools

Take advantage of the combination of stable chip formation and process-oriented chip control provided by the uncoated carbide grade WN15 and the 7R-E77 chipbreaker for consistent drilling and boring results. Order or request advice via Metav Werkzeuge for a seamless integration into production tooling.

P4840C-7R-E77 WN15 – Drilling/Boring Indexable Insert, 7R-E77 Chipbreaker – Walter Tools

A P4840C-7R-E77 WN15 indexable insert for drilling and bore-enlargement applications, engineered to deliver consistent chip formation and predictable cutting behaviour in industrial machining.

Drilling and boring indexable insert P4840C
Uncoated carbide grade WN15
7R-E77 chipbreaker for chip control
Engineered for process stability

Consistent drilling performance and predictable tool life

The P4840C-7R-E77 WN15 is designed to provide predictable cutting behaviour in drilling and bore-enlargement operations. The combination of uncoated carbide in grade WN15 and the 7R-E77 chipbreaker reduces the risk of uncontrolled chip formation, which in turn lowers the likelihood of tool failure and rework. For production environments that demand repeatability, the insert’s geometry and grade support steady wear progression and consistent hole quality, helping maintain cycle times and reduce scrap rates.

Improved chip control for safer, cleaner machining

Effective chip control is essential where reliability and surface finish matter. The 7R-E77 chipbreaker is tailored to break and evacuate chips efficiently during drilling and boring, which reduces heat concentration and minimises workpiece contamination. Better chip management translates into improved surface finish and reduced machine downtime for manual clearing. For operators who need straightforward explanations, a chipbreaker shapes the chips into shorter, manageable segments, preventing long swarf from obstructing the tool path or damaging the hole wall.

Practical application notes and selection guidance

The insert suits a range of machining scenarios but requires verification against the specific application matrix for material suitability; consult the product matrix before selection. The grade WN15 is an uncoated carbide formulation aimed at broad applicability—check compatibility with the workpiece material and operating speeds. When integrating the insert into a toolholder, ensure correct clamping and axial alignment to preserve process stability and repeatable results. For parameter setting, start with conservative feed rates and increase as stability is confirmed; the insert’s design supports controlled escalation of cutting data while maintaining repeatable performance.

For reliable drilling and boring operations with the Walter Tools P4840C-7R-E77 WN15, contact Metav Werkzeuge for ordering and detailed application advice at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: P4840C-7R-E77-WN15-WALTER
• Name: Bohr-/Aufbohrwendeschneidplatte P4840C-7R-E77 WN15 Walter Tools
• Type: Drilling/boring indexable insert
• Brand: Walter Tools

Core specifications

• Grade: WN15
• Chipbreaker: 7R-E77
• Designation: P4840C-7R-E77 WN15
• Series: Walter Schneidstoffsorte - Serie offen

Materials & features

• Material: Katalogabhängig (catalogue dependent)
• Coating: uncoated carbide
• Application: drilling and boring
• Product family: Wendeplatten (indexable inserts)

FAQ

What materials is this insert intended for?
The P4840C-7R-E77 WN15 is supplied as an uncoated carbide grade; suitability for specific materials should be verified against the product matrix to ensure the grade matches the workpiece.

How does the 7R-E77 chipbreaker improve hole quality?
The 7R-E77 chipbreaker shapes and fractures chips to aid evacuation during drilling and boring, which reduces heat concentration and supports a better surface finish and dimensional stability.

Is this insert suitable for high-speed applications?
The insert’s uncoated carbide grade provides versatility; however, high-speed suitability depends on the exact workpiece material and cutting conditions—refer to the product matrix for recommended cutting data.

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

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