P4840P-5R-E77 WNN15 Wendeplatten - Walter Tools

Efficient production through the combination of coated carbide durability and the 5R‑E77 chipbreaker for improved chip control; order the P4840P‑5R‑E77 WNN15 directly via Metav Werkzeuge or consult their specialists for application-specific guidance.

P4840P-5R-E77 WNN15 indexable drill/reaming insert, coated carbide, 5R‑E77 chipbreaker — Walter Tools

The P4840P‑5R‑E77 WNN15 is an indexable drill/reaming insert engineered for productive metalcutting, featuring a coated carbide grade and the 5R‑E77 chipbreaker to promote stable chip formation in serial machining environments

• Coated carbide grade WNN15
• 5R‑E77 chipbreaker for stable chips
• Designed for productive drilling and boring

Increased throughput with consistent cutting performance

The combination of a coated carbide grade and a purpose‑designed chipbreaker supports longer productive runs and predictable tool life. The WNN15 grade offers an engineered balance between wear resistance and toughness, which reduces unplanned tool changes and helps maintain cycle-time stability. The 5R‑E77 geometry shapes chips reliably to avoid entanglement and assist coolant flow; this lowers the risk of surface damage and contributes to steady process output. For workshops aiming to raise on‑machine availability, these design choices deliver measurable operational benefits without complex process changes.

Process security through reliable chip control and geometry

The insert’s 5R‑E77 chipbreaker is tuned to break and evacuate chips during drilling and reaming operations, improving hole quality and reducing clogging. Chipbreaker function is central to chip morphology: controlled fragmentation eases evacuation from the bore and reduces thermal load on the cutting edge. The insert geometry marked by the P4840P designation provides a stable seating and repeatable indexation in compatible tool holders, enabling quick insert changes and minimised downtime. Those looking for reproducible hole finish and dimensional consistency will value the engineered chip control.

Material suitability and selection guidance

This coated carbide grade is a standard technical solution within Walter’s open series; material suitability should be verified against the specific product matrix to match component material and cutting conditions. The insert’s coating enhances surface hardness and wear resistance, which is advantageous when facing abrasive or mixed‑alloy batches. For unfamiliar workpiece materials or hardened steels, consult the product matrix to determine whether WNN15 is optimal or if an alternative grade is recommended. Correct grade selection ensures stable cutting forces, improved surface finish and extended edge life.

Integration into the production cell and handling advantages

Indexable inserts of this designation permit rapid replacement without reground tooling, promoting lean spare‑parts management and straightforward inventory control. The insert is intended for use in modular indexable holders that allow secure clamping and consistent seating for repeat work. Less time spent on tool dressing and more time at cutting speeds directly enhances throughput. In combination with appropriate coolant strategies and holder stiffness, the insert supports predictable cycle times and repeatable hole tolerances, which are key drivers for productive machining cells.

For application advice tailored to a specific component or to secure the P4840P‑5R‑E77 WNN15 from Metav Werkzeuge, contact Metav Werkzeuge for expert guidance and fast supply coordination.

Technical data

• Article number: P4840P-5R-E77-WNN15-WALTER
• SKU: P4840P-5R-E77-WNN15-WALTER
• Designation: P4840P-5R-E77 WNN15
• Product type: Bohr-/Aufbohrwendeschneidplatte (indexable drill/reaming insert)
• Manufacturer: Walter Tools

Facts

• Grade family: Walter Schneidstoffsorte - Serie offen
• Grade: WNN15
• Chipbreaker: 5R‑E77
• Coating / material: beschichtetes Hartmetall (coated carbide) — catalogue dependent
• Series: Walter Schneidstoffsorte - Serie offen

Special features

• Stable chip formation through 5R‑E77 geometry
• Designed for drilling and reaming applications
• Quick indexation for reduced tool change time
• Sorteneinsatz: verify material suitability with the product matrix

FAQ

What materials is this insert suitable for?
Material suitability for the P4840P‑5R‑E77 WNN15 must be checked against the specific product matrix; the grade is a coated carbide class intended for a broad range of applications, but the matrix defines optimal use.

How does the 5R‑E77 chipbreaker improve hole quality?
The 5R‑E77 chipbreaker promotes controlled chip fragmentation and evacuation, reducing chip congestion in the bore and helping to maintain consistent surface finish and dimensional accuracy.

Is the insert suitable for regrinding or resharpening?
The P4840P‑5R‑E77 is an indexable insert designed for replacement rather than regrinding; its value is realised through rapid indexation and consistent seating for repeatable results.

How does the WNN15 grade influence tool life?
The WNN15 coating and carbide combination aims to balance wear resistance and toughness, contributing to longer usable edge life under appropriate cutting parameters and material selection.

What does the product designation signify?
The designation P4840P‑5R‑E77 identifies the insert geometry and the integrated chipbreaker style; this aids in selecting the correct insert for holder compatibility and intended holemaking tasks.

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

The Walter AG (brand: Walter Tools) with headquarters in Tübingen is a leading manufacturer of precision cutting tools and is part of the Sandvik group. Protected trademarks and trade names are the property of their respective owners. The mentioned brand names serve explanatory purposes only. There is no affiliation between Metav Werkzeuge and the trademark owners. The offered article is original, factory‑new merchandise of the manufacturer.