P4840P-3R-E77 WNN15 WNN15 Wendeplatten - Walter Tools

Take advantage of the combination of coated carbide performance, 3R‑E77 chip control, and a Walter production standard for predictable machining and high process reliability; order the insert directly via Metav Werkzeuge or consult our specialists for application-specific guidance.

P4840P-3R-E77 WNN15 drilling/boring indexable insert – Walter Tools, 3R‑E77 chipbreaker

P4840P-3R-E77 WNN15 is a coated carbide indexable insert engineered for drilling and bore-enlargement operations in industrial machining, offering reliable chip control and repeatable edge stability.

• Coated carbide grade WNN15 for stable edge
• 3R‑E77 chipbreaker for reliable chip control
• Designed for drilling and bore‑enlargement

Predictable chip behaviour for uninterrupted cycles

The insert combines a dedicated 3R‑E77 chipbreaker with a coated carbide cutting material to reduce chip packing and improve evacuation in through‑hole and bore‑enlargement tasks. This leads to more consistent machining cycles and fewer stoppages for cleaning or rework. The chipbreaker geometry actively shapes chips to reduce spatter and surface marking, helping maintain cycle times and lowering scrap rates in repetitive operations.

Longer tool life and steady surface quality

Using the WNN15 grade supports a stable cutting edge under typical drilling loads, which translates into extended tool life and more predictable replacement intervals. The coating and carbide combination provides wear resistance that preserves dimensional accuracy and surface finish across batches, so machinists and production planners can expect fewer process variations and better uptime from tool programmes.

Easy process integration and selection guidance

The insert is intended for integration into standard drilling toolholders and bore‑enlargement assemblies as an indexable insert, enabling quick edge changes and minimal downtime. Material suitability should be checked against the provided product matrix; the grade and chipbreaker are optimised for a broad range of cutting tasks but require verification for specialised alloys. For application recommendations and cutting data, Metav Werkzeuge can provide tailored support and documentation.

For tailored application advice or to request a technical data sheet for the Walter Tools P4840P-3R-E77 WNN15, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss the optimal setup for the intended machining task

Technical data

• Article number: P4840P-3R-E77-WNN15-WALTER
• SKU: P4840P-3R-E77-WNN15-WALTER
• Product type: drilling/boring indexable insert
• Brand: Walter Tools
• Grade: WNN15
• Chipbreaker: 3R‑E77
• Series: Walter Schneidstoffsorte – Serie offen

Core data

• No measurable numerical parameters provided in source data

Special features

• Coating: coated carbide (as per grade description)
• Material information: catalogue dependent
• Application: drilling and bore‑enlargement
• Insert designation: P4840P‑3R‑E77 WNN15
• Mounting: indexable insert format for standard holders

FAQ

What materials is this insert suited for?
The P4840P‑3R‑E77 WNN15 insert is a coated carbide grade intended for a broad range of machining tasks; specific material suitability should be checked against the product matrix before use.

How does the 3R‑E77 chipbreaker improve drilling performance?
The 3R‑E77 geometry actively controls chip formation, promoting shorter, breakable chips and improved evacuation during drilling and bore enlargement, which reduces interruptions and enhances surface quality.

Can the insert be used in standard drill holders?
Yes, the insert is designed as an indexable format compatible with conventional drilling and bore‑enlargement toolholders; confirm seat and clamping compatibility with the holder specifications.

How often should the insert be indexed or replaced?
Indexing and replacement intervals depend on workpiece material, cutting data and machining conditions; the WNN15 grade is chosen for wear resistance to extend edge life under typical loads.

Is the insert coated and what does that mean for wear resistance?
The insert is specified as a coated carbide grade (WNN15), providing improved abrasion resistance and a more durable cutting edge in industrial drilling operations.

Hersteller: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen

Protected trademarks and trade names are the property of their respective owners. Brand names and registered marks are mentioned solely for explanation. There is no affiliation between our company and the brands cited. The offered article is an original, factory‑new product of the named manufacturer. The Walter AG (marketed as Walter Tools) is part of the Sandvik Group and is recognised for precision cutting solutions.