P4840P-7R-E77 WN15 Wendeplatten - Walter Tools

Efficient combination of the uncoated carbide WN15 grade and the 7R‑E77 chipbreaker ensures reliable chip control and consistent performance in drilling and bore‑enlarging operations; suitable machining ranges should be verified in the product matrix. Order the P4840P-7R-E77 WN15 via Metav Werkzeuge or consult our technical advisors for application-specific support.

P4840P-7R-E77 WN15 – Indexable insert for drilling and boring, chipbreaker 7R‑E77 (Walter Tools)

The P4840P-7R-E77 WN15 is an indexable insert developed for drilling and bore‑enlarging tasks, combining an uncoated carbide grade with a specialised 7R‑E77 chipbreaker to support stable material removal in industrial machining contexts.

• Drilling and boring indexable insert
• Uncoated carbide grade WN15
• Chipbreaker 7R‑E77 for reliable chips
• Walter Tools open-series cutting grade

Proven stability and measurable productivity gains

The combination of the WN15 cutting grade and the 7R‑E77 chipbreaker gives the insert dependable chip control and predictable wear characteristics during interrupted or continuous drilling cycles. The uncoated carbide substrate provides a straightforward cutting edge behaviour, which helps maintain repeatable results during serial production. For operations that prioritise cycle time and tool life, the insert’s geometry reduces the likelihood of unstable chip formation, contributing to fewer stoppages and more consistent part quality. This focus on process efficiency supports rational decision‑making when selecting tooling for high‑volume or regulated production lines.

Clear guidance on material suitability and application limits

This insert belongs to the Walter open series and is specified as an uncoated hardmetal grade; material compatibility must be established using the product matrix supplied by the manufacturer. Instead of generalised claims, the grade description directs users to verify the matching of workpiece material and cutting data for optimal performance. The absence of a coating often means predictable flank wear and simpler reconditioning, which can be advantageous in stable machining scenarios. Where higher thermal or adhesive wear resistance is required, users should compare the WN15 grade against alternative coated grades in the Walter range to determine the most economical option for the intended application.

Practical integration and handling in production environments

As an indexable solution for drilling and bore‑enlarging, the insert is designed for straightforward mounting into compatible holders and quick index changes, supporting short tool-change routines and minimal downtime. The geometry of the chipbreaker contributes to controlled chip flow and reduced risk of built‑up edge, which aids safe swarf evacuation and machine cleanliness. For parameter selection and to ensure compatibility with specific spindle speeds and feeds, consult the product matrix or Metav Werkzeuge’s technical documentation; tailored recommendations help align cutting data with machine capability and workpiece characteristics, improving overall process reliability.

For application-specific advice on Walter Tools indexable inserts or to arrange fast supply of the P4840P-7R-E77 WN15, contact Metav Werkzeuge’s technical consultants via info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: P4840P-7R-E77-WN15-WALTER
• Designation: P4840P-7R-E77 WN15
• Product type: Indexable insert for drilling/boring
• Manufacturer: Walter Tools

Core data

• Chipbreaker: 7R‑E77
• Grade: WN15
• Series: Walter Schneidstoffsorte - Serie offen
• Material specification: Katalogabhängig

Special features

• Uncoated carbide (unbeschichtetes Hartmetall)
• Designed for stable chip control in drilling/boring
• Sorteneinsatz: check material suitability in product matrix
• Quick index capability for reduced downtime

FAQ

What applications is this insert designed for?
The P4840P-7R-E77 WN15 indexable insert from Walter Tools is designed for drilling and bore‑enlarging operations where consistent chip control and predictable wear are essential.

Is the WN15 grade coated or uncoated?
WN15 is specified as an uncoated carbide grade; the product description indicates unbeschichtetes Hartmetall and advises verification of material suitability in the product matrix.

How does the 7R‑E77 chipbreaker affect machining?
The 7R‑E77 chipbreaker promotes controlled chip formation and safe swarf evacuation, supporting stable machining conditions and helping to reduce interruptions in production.

Can the insert be reconditioned or reground?
The uncoated carbide substrate of the insert typically offers predictable wear patterns and can be considered for reconditioning depending on service policies and cost analysis; consult Walter Tools guidance and Metav Werkzeuge for specific options.

Which documentation should be consulted for cutting data?
Refer to the Walter product matrix and technical data sheets to identify recommended cutting speeds, feeds and compatible workpiece materials for the P4840P-7R-E77 WN15.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen Protected trademarks and trade names are the property of their respective owners and are mentioned solely for clarification. There is no affiliation between Metav Werkzeuge and the trademark owners. The offered item is original, factory‑new product of the manufacturer.