P4840C-4R-E77 WNN15 Wendeplatten - Walter Tools

Take advantage of the WNN15 coated‑carbide grade together with the 4R‑E77 chipbreaker to achieve stable chip formation and extended tool life; order the insert directly via Metav Werkzeuge or contact our consultants for application advice.

P4840C-4R-E77 WNN15 Walter Tools – indexable insert for drilling and bore‑enlargement with WNN15 coated carbide and 4R‑E77 chipbreaker

The P4840C-4R-E77 WNN15 is an indexable insert engineered for drilling and bore‑enlargement operations, combining a coated‑carbide substrate with a dedicated chipbreaker for consistent metal removal

*Coated carbide grade WNN15 for durability
*4R‑E77 chipbreaker for controlled chip formation
*Designed for drilling and bore‑enlargement inserts

Consistent throughput through material‑friendly geometry

The insert features the WNN15 coated‑carbide grade, which is formulated to offer a balance of wear resistance and toughness; this material composition helps maintain a stable cutting edge under variable cutting conditions. The geometry prioritises efficient metal removal while reducing the risk of premature flank wear, which in turn supports reliable cycle times on production lines. For workshops seeking predictable performance, the coated substrate contributes directly to longer intervals between index changes and lower overall tooling costs.

Controlled chips and improved surface quality

Integrated with the 4R‑E77 chipbreaker, the cutting edge promotes consistent chip control, breaking chips into manageable segments to reduce interruptions and cleaning time. Controlled chip formation lowers the likelihood of chip recutting and helps preserve the machined bore surface, resulting in improved surface finish and reduced rework. The chipbreaker design also aids coolant access and heat dissipation, supporting stable process conditions during deep drilling or bore enlargement.

Economical handling and reduced downtime

As an indexable solution, this insert reduces tool change time compared with solid‑tool alternatives. The combination of the coated grade and the chipbreaker delivers enhanced tool life, so fewer inserts are required over comparable campaigns. The insert format simplifies inventory management: keeping a small number of reference SKUs such as P4840C‑4R‑E77‑WNN15‑WALTER can cover many jobs. Where toolholders and clamping systems are already in place, replacement is fast and cost‑effective, improving overall shop productivity.

Application guidance and compatibility checks

Material suitability should be verified against the specific product matrix; the grade is described as coated carbide, and the series is listed as "open", so compatibility depends on the workpiece material and machining parameters. For reliable integration into existing tool systems, confirm clamping specifications and cooling strategy. If further technical data or tailored recommendations are required, Metav Werkzeuge can advise on feeds, speeds and holder compatibility to ensure the insert meets the desired manufacturing goals.

Contact Metav Werkzeuge to request technical clarification or to procure the P4840C-4R-E77 WNN15 insert; please quote SKU P4840C-4R-E77-WNN15-WALTER for rapid handling

Technical Data

• Article number: P4840C-4R-E77-WNN15-WALTER
• Product name: Bohr-/Aufbohrwendeschneidplatte P4840C-4R-E77 WNN15 Walter Tools
• ISO designation: P4840C-4R-E77 WNN15
• Manufacturer: Walter Tools

Core data

• SKU: P4840C-4R-E77-WNN15-WALTER
• Grade: WNN15
• Chipbreaker code: 4R‑E77
• Series: Walter Schneidstoffsorte - Serie offen

Special features

• Material: catalogue‑dependent
• Coating: coated carbide (described as beschichtetes Hartmetall)
• Product type: indexable insert for drilling / bore enlargement
• Note: check product matrix for workpiece suitability

FAQ

What materials is this insert suitable for?
Material suitability must be checked against the product matrix; the P4840C-4R-E77 WNN15 is a coated carbide grade and its compatibility with specific steels or non‑ferrous alloys depends on the machining parameters.

How does the 4R‑E77 chipbreaker affect machining?
The 4R‑E77 chipbreaker promotes controlled chip segmentation and smoother evacuation, which supports consistent bore quality and reduces the chance of chip‑related interruptions when using the P4840C‑4R‑E77 insert.

Can the insert be re‑ground or resharpened?
As a coated, indexable plate, the P4840C‑4R‑E77 WNN15 is intended for index replacement rather than repeated re‑grinding; tool life is managed through indexing and replacement to preserve coating integrity and edge geometry.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and protected trademarks are mentioned for explanatory purposes only. There is no connection between our company and the mentioned brands. The offered article is original factory‑new goods of the manufacturer.