P4840P-6R-E77 WNN15 WNN15 Wendeplatten - Walter Tools

Take advantage of the combination of high-performance WNN15 grade, a precisely engineered 6R-E77 chipbreaker and the proven P4840P geometry to improve machining stability and reduce downtime; order original Walter Tools inserts through Metav Werkzeuge or request advice from their consultants for application matching.

P4840P-6R-E77 WNN15 — Drilling/boring indexable insert by Walter Tools, coated carbide grade with 6R-E77 chipbreaker

The P4840P-6R-E77 WNN15 is an indexable cutting insert for drilling and boring operations, engineered to combine controlled chip formation with consistent edge stability for production environments.

• Coated carbide grade WNN15 for broad applications
• 6R-E77 chipbreaker for consistent chip control
• Geometry P4840P-6R-E77 for drilling and boring
• Original Walter Tools indexable insert

Controlled chips for faster, safer material removal

The integrated 6R-E77 chipbreaker delivers predictable chip control, reducing the risk of chip congestion and re-cutting. This results in steadier cutting forces, fewer interruptions for chip clearing and more consistent cycle times across batches. The chip management capability also supports safer unattended shifts and helps to protect the workpiece surface from damage caused by uncontrolled swarf. For workshops aiming to raise throughput without compromising process reliability, the controlled chip flow is a direct contributor to measurable productivity gains.

Coated carbide composition that extends tool life

The insert is furnished in the WNN15 grade, a coated carbide class designed to enhance wear resistance and preserve the cutting edge under typical drilling and boring loads. Coating technology improves abrasion resistance and reduces flank wear, which in turn supports longer tool life and fewer insert changes during production. Material suitability depends on the specific workpiece and cutting conditions; therefore the product matrix should be consulted to match the WNN15 grade with the intended application and machining parameters to achieve the best balance of life and surface quality.

Geometry optimised for precision and repeatability

The P4840P geometry provides a stable cutting interface for centreline and peripheral engagement typical of drill-bodied and boring-holder assemblies. The form is configured to promote precision and repeatability in hole quality, helping to maintain concentricity and bore tolerance over runs. The indexable format simplifies tool handling: inserts are replaced rather than re-ground, which reduces setup variation and supports consistent process capability across shifts. Where bore finish and dimensional control are priorities, geometry and grade pairing are decisive factors in securing reproducible results.

Smooth integration into machining systems and production planning

The insert is supplied as an original Walter Tools component and is intended for integration into compatible drilling and boring toolholders that accept the P4840P designation. Inventory and tool-change strategies benefit from standardised insert codes and predictable wear characteristics. For optimal implementation, confirm holder compatibility and cutting parameters against the manufacturer’s product matrix; Metav Werkzeuge consultants can provide the necessary technical data and selection support to align insert choice with machining goals and cycle forecasts.

For technical confirmation of suitability, specification sheets or the product matrix for the Walter Tools WNN15 grade, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 — Metav Werkzeuge will advise on selection and supply.

Technical Data

• SKU: P4840P-6R-E77-WNN15-WALTER
• Designation: Drilling/boring indexable insert P4840P-6R-E77 WNN15
• Manufacturer: Walter Tools
• Grade: WNN15
• Geometry: 6R-E77
• Series: Walter Schneidstoffsorte - Serie offen
• Material: catalogue-dependent

Facts

• ISO designation: P4840P-6R-E77 WNN15
• SKU: P4840P-6R-E77-WNN15-WALTER
• Chipbreaker code: 6R-E77
• Series code: Walter Schneidstoffsorte - Serie offen

Special features

• Coated carbide grade
• Designed for drilling and boring
• Check product matrix for material suitability
• Original Walter Tools component
• Wendeplatte designation: P4840P-6R-E77

FAQ

Which materials can this insert machine effectively?
The suitability of the P4840P-6R-E77 WNN15 insert depends on the workpiece material and cutting conditions; the WNN15 grade is a coated carbide class and the specific material matches should be verified in the manufacturer’s product matrix before use.

How does the 6R-E77 chipbreaker affect machining performance?
The 6R-E77 chipbreaker on the P4840P-6R-E77 promotes controlled chip segmentation and evacuation, which reduces chip-related interruptions and supports steadier cutting forces during drilling and boring with the Walter Tools insert.

Is this insert suitable for finishing operations such as reaming?
The insert is intended for drilling and boring operations; for finishing passes or reaming, application parameters and the product matrix should be consulted to determine whether the P4840P-6R-E77 WNN15 achieves the required surface finish and tolerance.

What toolholders are compatible with the P4840P-6R-E77 geometry?
Holders designed for the P4840P family and for the 6R-E77 geometry will accept this indexable insert; confirmation of holder compatibility and clamping style is recommended prior to ordering to ensure correct fit and secure seating.

How can tool life be optimised with this insert?
Optimise cutting speed, feed and depth of cut according to the product matrix, maintain stable clamping and monitor tool wear; selecting the P4840P-6R-E77 WNN15 insert for the correct application contributes to extended service life and predictable replacement intervals.

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

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